Type | Journal Article |
---|---|
Author | Hervé Etienne |
Author | David Breton |
Author | Jean-Christophe Breitler |
Author | Benoît Bertrand |
Author | Eveline Déchamp |
Author | Rayan Awada |
Author | Pierre Marraccini |
Author | Sophie Léran |
Author | Edgardo Alpizar |
Author | Claudine Campa |
Author | Philippe Courtel |
Author | Frédéric Georget |
Author | Jean-Paul Ducos |
URL | https://www.frontiersin.org/articles/10.3389/fpls.2018.01630/full |
Volume | 9 |
Publication | Frontiers in Plant Science |
ISSN | 1664-462X |
Date | 2018 |
Extra | 00000 Publisher: Frontiers |
Journal Abbr | Front. Plant Sci. |
DOI | 10.3389/fpls.2018.01630 |
Accessed | 6/1/2021, 6:43:28 PM |
Library Catalog | Frontiers |
Language | English |
Abstract | Since the 1990s, somatic embryogenesis (SE) has enabled the propagation of selected varieties, Arabica F1 hybrid and Robusta clones, originating from the two cultivated coffee species, Coffea arabica and C. canephora, respectively. This paper shows how mostly empirical research has led to successful industrial transfers launched in the 2000s in Latin America, Africa and Asia. Coffee SE can be considered as a model for other woody perennial crops for the following reasons: (i) a high biological efficiency has been demonstrated for propagated varieties at all developmental stages, and (ii) somaclonal variation is understood and mastered thanks to intensive research combining molecular markers and field observations. Coffee SE is also a useful model given the strong economic constraints that are specific to this species. In brief, SE faced five difficulties: (i) the high cost of SE derived plants compared to the cost of seedlings of conventional varieties, (ii) the logistic problems involved in reaching small-scale coffee growers, (iii) the need for certification, and (iv) the lack of solvency among small-scale producers. Nursery activities were professionalized by introducing varietal certification, quality control with regard to horticultural problems and somaclonal variation, and sanitary control for Xylella fastidiosa. In addition, different technology transfers were made to ensure worldwide dissemination of improved F1 Arabica hybrids and Robusta clones. Innovations have been decisive for successful scaling-up and reduction of production costs, such as the development of temporary immersion bioreactors for the mass production of pre germinated embryos, their direct sowing on horticultural soil, and their propagation of rejuvenated SE plants by rooted mini-cuttings. Today, SE is a powerful tool that is widely used in coffee for biotechnological applications including propagation and genetic transformation. Basic research has recently started taking advantage of optimized SE protocols. Based on omics methodologies, research aims to decipher the molecular events involved in the key developmental switches of coffee SE. In parallel, a high-throughput screening of active molecules on SE appears to be a promising tool to speed-up the optimization of SE protocols. |
Short Title | Coffee Somatic Embryogenesis |
Date Added | 6/1/2021, 6:43:28 PM |
Modified | 6/1/2021, 6:43:29 PM |
Type | Journal Article |
---|---|
Author | Jean-Paul Ducos |
Author | Charles Lambot |
Author | Vincent Pétiard |
URL | http://www.globalsciencebooks.info/Online/GSBOnline/images/0706/IJPDB_1(1)/IJPDB_1(1)1-12o.pdf |
Volume | 1 |
Issue | 1 |
Pages | 1-12 |
Publication | International Journal of Plant Developmental Biology |
Date | 2007 |
Extra | 00073 |
Library Catalog | Zotero |
Language | en |
Abstract | Coffee somatic embryogenesis in liquid medium is a powerful alternative to other vegetative propagation techniques for mass propagation of selected Coffea canephora (Robusta) clones and F1 Coffea arabica hybrids. This review presents the different types of bioreactors used for coffee somatic embryogenesis by Nestlé R&D Centre-Tours and by other scientific teams. Mechanically agitated bioreactors were used for the production of torpedo-shaped embryos. Critical parameters are the inoculation density (0.5 to 1.0 g FW L-1), medium renewing and the initial oxygen transfer rate (KLa: 5 h-1). In this system, Robusta embryo concentrations range between 200,000 to 400,000 L-1 within 2 months. Maturation from the torpedo to the cotyledonary-stage embryos was achieved in various temporary immersion bioreactors (TIB): in 1-L RITA® system (up to 1,000 cotyledonary embryos per system), in 10-L glass bottles (up to 20,000) and in 10-L flexible disposable bags. The latter one, the so-called “Box-in-Bags”, insures a higher light transmittance to the biomass due to its horizontal design. At the end of the maturation phase, the somatic embryos are green and able to photosynthesize: these pregerminated embryos can be directly transplanted to the greenhouse to get fully germinated plantlets. More recently, a temporary root immersion bioreactor (TRI) has been described for the growth of individualized Arabusta plantlets in photoautautrophic conditions, i.e. in sugar-free medium with enriched CO2 and high light intensity. The pros and cons of these different bioreactors will be discussed considering how they can be integrated in a mass propagation process. We present a “state of the art” by describing a pilot scale process for the production of pregerminated Robusta embryos and some examples of diffusion of coffee selected genotypes. These last years, two major trends have been developed for industrial micropropagation: i) bulk-cultivation of small propagules in photomixotrophic conditions (with sugar) followed by their selection and transfer to the greenhouse for their conversion to plant, ii) production of singulated and fully developed plantlets in the laboratory under photoautotrophic conditions. Next development in coffee mass propagation by somatic embryogenesis will probably originate from the combination of these two approaches. The usage of the “micro-environment” method, combined with media releasing CO2, is well adapted for the ex vitro germination of coffee embryos. Particularly, this method can be a relevant alternative to the conventional one, consisting on insufflating CO2 in the culture rooms or in the greenhouses. |
Date Added | 6/1/2021, 6:37:45 PM |
Modified | 10/18/2021, 9:25:15 PM |
Type | Journal Article |
---|---|
Author | K. Duhem |
Author | N. Le Mercier |
Author | Ph. Boxus |
URL | https://www.actahort.org/books/225/225_7.htm |
Issue | 225 |
Pages | 67-76 |
Publication | Acta Horticulturae |
ISSN | 0567-7572, 2406-6168 |
Date | 06/1988 |
Journal Abbr | Acta Hortic. |
DOI | 10.17660/ActaHortic.1988.225.7 |
Accessed | 10/9/2021, 6:36:40 PM |
Library Catalog | DOI.org (Crossref) |
Abstract | The field practicability of previously described germplasm collecting methods for tropical woody species was tested on 11 Coffea robusta and 8 Theobroma cacao clones grown in Cameroon. Orthotropic shoots of both species were collected each month over a two years period in Cameroon. They were rapidly shipped to the laboratory in Belgium for disinfection and inoculation onto culture media. Bacterial and fungal contamination were respectively associated with nodal and meristem cultures of coffee and with nodal cultures of cocoa. A wide range of sterilants used at various concentrations, alone or in combination and several antibiotics and fungicides as medium additives were tested without success. Moreover, some antibiotics previously considered non-phytotoxic induced explant necrosis. Other attempts to control the severe contaminations by pretreatment in Cameroon of explants with surface sterilants and by inoculation on media containing antimicrobial agents before shipping failed. Partial control of contamination was eventually achieved by pretreatment of clonal material grown in a greenhouse. This last procedure allowed the clonal micropropagation program to start. |
Date Added | 10/9/2021, 6:36:40 PM |
Modified | 10/20/2021, 5:28:49 PM |
Type | Journal Article |
---|---|
Author | Andrea Menéndez-Yuffá |
Author | Dominique Barry-Etienne |
Author | Benoît Bertrand |
Author | Frédéric Georget |
Author | Hervé Etienne |
URL | https://link.springer.com/article/10.1007/s11240-010-9734-4 |
Volume | 102 |
Issue | 3 |
Pages | 297–307 |
Publication | Plant Cell, Tissue and Organ Culture (PCTOC) |
Date | 2010 |
Extra | Publisher: Springer |
DOI | 10.1007/s11240-010-9734-4 |
Library Catalog | Google Scholar |
Abstract | Plants of Coffea arabica L. derived via somatic embryogenesis, namely, somaclones, were evaluated with C. arabica seedlings grown in the nursery. At the time of their transfer to the nursery, somaclones of C. arabica cvs. Caturra and Costa Rica 95 (Catimor) were smaller and less vigorous than seedlings of the same cultivars. Following an initial slow growth for a period of 10 weeks, somaclones began to grow faster than seedlings until both groups of plants were equal in size at 21 weeks (entire duration of growth in the nursery). Comparisons of aerial and root systems of 30-cm long somaclones and seedlings of two cultivars revealed that plants of somaclones were more vigorous than seedlings, based on the higher number of leaves (13–16 vs. 9), larger leaf area (1060–1280 vs. 730–890 cm2), and greater dry weight of aerial organs (8.5–12 vs. 7.0–7.5 g). For cv. Caturra, the root dry weight of somaclones was significantly greater than that of seedlings (2.7 vs. 1.9 g) and was attributable to the large diameter roots (>0.5 mm). Analysis of 176,000 F1 hybrid somaclones revealed that these exhibited more heterogeneous growth than did the seedlings derived from zygotic embryos; moreover, there was a genotype effect. Almost 9–20% of somaclones required an additional 3–4 months of growth in the nursery, and 8–12% were culled for other undesirable horticultural attributes. Only 0.10–0.23% of somaclones displayed variant phenotypes. The observed somaclone vigor in the nursery was carried over to field performance as these plants were more precocious than seedlings and yielded coffee beans 1 year earlier than seedlings. |
Date Added | 10/10/2021, 10:30:36 PM |
Modified | 10/18/2021, 8:00:39 PM |
Extracted Annotations (10/12/2021, 4:37:20 PM)
"Seeds were sown in a straight line under 2 cm of horticultural soil applying the same growing conditions (type of substrate, planting density, fertilization, shade level, watering frequency) used for pre-germinated somatic embryos. Under these conditions, seedlings with one pair of leaves suitable for transfer to the nursery were obtained after 11 weeks." (p. 299)
"Plantlets grown from seeds and somatic embryos were transferred to 1-l plastic bags (experimental conditions) or 0.3-l plugs (industrial conditions; Fig. 2d) on a substrate consisting of a peat-based growing medium (Pro-mix; Premier Tech, Riviere-du-Loup, QC, Canada) and coffee pulp (3/1, v/v) under conventional nursery conditions (Fig. 2c, f) until they reached the required size for planting in the field (approx. 30 cm; Fig. 2g)." (p. 299)
"Upon transfer to the nursery, seedlings were clearly larger, with large cotyledons and a longer hypocotyl, and they seemed to be more vigorous than the somaclones." (p. 304)
"These differences resulted from slower somaclone growth, longer development time for in vitro pre-germination (12 weeks), and slower plantlet conversion in the greenhouse (15-20 weeks). In contrast, seedlings were ready for transfer to the nursery after only 11 weeks." (p. 304)
"Due to the impossibility of comparing somaclones and seedlings of the same age (days after germination) in the nursery, we conducted a morphological comparison of somaclones and seedlings of the same size (30 cm)" (p. 305)
"Even though our method has been improved by selecting pre-germinated embryos in bioreactors and by optimizing acclimatization conditions, we found that heterogeneity between somaclones was still greater than that between seedlings in the industrial nursery setting." (p. 306)
"As previously reported, this heterogeneity in somaclone development at the nursery level resulted directly from the morphological heterogeneity of somatic embryos produced in bioreactors (Barry-Etienne et al. 2002a)." (p. 306)
"Somaclonal variation is still a serious bottleneck in various well-developed somatic embryogenesis systems." (p. 306)
"We previously estimated (Etienne and Bertrand 2001) a 2.1% frequency of morphological variants at the field level in coffee trees regenerated from 6-month-old embryogenic suspensions. Nevertheless, with the improved method reported here, we found only 0.1-0.2% of our sample of 176,421 somaclones in an industrial nursery were somaclonal variants." (p. 306)
"80% of morphological variants can be detected at the nursery stage, thereby allowing the elimination of unsatisfactory plants and reducing one problem associated with the commercial production of coffee somaclones." (p. 307)
"The percentage of unsatisfactory plants due to undesirable horticultural attributes is higher with somaclones (around 8-12.5%), but not prohibitive using the technology developed here." (p. 307)
"It is commonly found in the field that hybrid clones flower after 9-11 months, whereas plants grown from seedlings flower after 21-23 months." (p. 307)
"We have previously suggested that somaclones are less juvenile than plants derived from seeds. We also found this to be the case in this study, based on the more rapid and more vigorous development of somaclones during the later nursery stages." (p. 307)
Type | Journal Article |
---|---|
Author | Naji Ebrahim |
Author | Rida Shibli |
Author | Ibrahim Makhadmeh |
Author | Mohamad Shatnawi |
Author | Abdallah Abu-Ein |
URL | https://www.academia.edu/4313737/In_vitro_Propagation_and_In_vivo_Acclimatization_of_Three_Coffee_Cultivars_Coffea_arabica_L_From_Yemen |
Volume | 2 |
Issue | 2 |
Pages | 142–150 |
Publication | World Applied Sciences Journal |
ISSN | 1818-4952 |
Date | 2007 |
Journal Abbr | World Appl. Sci. J |
Library Catalog | Google Scholar |
Abstract | Micropropagation of Coffea arabica cvs. Oudayni, Hammady and Dawaeiry from Yemen were initiated from seeds. Seeds were surface sterilized and inoculated into media supplemented with different salt strengths and germinated under dark. Seeds germinated on agar medium gave high hypocotyl length, high root length and full cotyledonary leaves expansion after 120 days of culture. Proliferation of these cultivars was experimented on MS media supplemented with different levels (0.0, 2.0, 4.0. 6.0 or 8.0 mg l ) of 1 N6-Benzyladenine (BA), Thidiazuron (TDZ), 6-furfurylaminopurine (Kinetin), 6-(4-hydroxy-3-methyl-2- butenylamino) purine (Zeatin) or 6-( , -Dimethylallylamino) purine (2ip). Highest proliferation for all cultivars was obtained when BA was used at the highest level (8.0 mg l ). Satisfactory proliferation rate in the three 1 cultivars was achieved at 8.0 mg l kinetin and 6.0 mg l TDZ. Zeatin and 2ip were both failed to promote 11 proliferation at any used level. Rooting was experimented on half-strength MS media supplemented with different levels (0.0, 2.0, or 3.0 mg l ) of indole-3- butyric acid (IBA), indole-3- acetic acid (IAA) or 1-naphthaleneacetic acid (NAA). Highest root number and length was achieved at 3.0 mg l 1 IAA or IBA for all cultivars. Rooted plantlets were transferred to 1 peat: 1 perlite mixture and ex vitro acclimatization gave 100% survival. |
Date Added | 10/10/2021, 10:30:36 PM |
Modified | 10/20/2021, 6:58:13 PM |
Type | Journal Article |
---|---|
Author | J. P. Ducos |
Author | G. Labbe |
Author | C. Lambot |
Author | V. Pétiard |
URL | https://link.springer.com/article/10.1007/s11627-007-9075-0 |
Volume | 43 |
Issue | 6 |
Pages | 652–659 |
Publication | In Vitro Cellular & Developmental Biology-Plant |
Date | 2007 |
Extra | Publisher: Springer |
DOI | 10.1007/s11627-007-9075-0 |
Library Catalog | Google Scholar |
Abstract | The objective was to set up a pilot scale process for robusta (Coffea canephora) industrial propagation by somatic embryogenesis in liquid media. A batch production of pre-germinated embryos was initiated once every 2 mo. in 2003 and 2004, then every mo. in 2005. Each run batch requires 4 to 6 mo. to produce the pre-germinated somatic embryos and consists of three phases: (1) the development of torpedo stage embryos in Erlenmeyer flasks, (2) pre-germination in temporary immersion bioreactors to allow maturation from the torpedo stage to the cotyledonary stage, (3) maintaining the embryos under storage conditions before their shipment to coffee producing countries. Starting from 1 kg of embryogenic calluses, a total of 4.4 million pre-germinated embryos for 17 clones were produced over 3 yr. This embryo number was enough to potentially regenerate 2 million plants, as the global embryo-to-plantlet conversion rate was estimated to 46% after acclimatization and complete germination in the greenhouse. At the end of April 2006, 600,000 somatic seedlings were transferred into plastic bags in nurseries or were already planted in the fields, mainly in Thailand. The current capacity allows the production of 2.5 million embryos per year, equivalent to a potential of about 1.0 million plantlets. The technical package has recently been transferred to National Institutes in Mexico, Thailand, and Vietnam. |
Date Added | 10/10/2021, 10:30:36 PM |
Modified | 10/20/2021, 5:26:52 PM |
Type | Journal Article |
---|---|
Author | A. H. Lubabali |
Author | A. E. Alakonya |
Author | E. K. Gichuru |
Author | J. W. Kahia |
Author | R. N. Mayoli |
URL | https://www.ajol.info/index.php/ajb/article/view/120783 |
Volume | 13 |
Issue | 24 |
Pages | 2414-2419 |
Publication | African Journal of Biotechnology |
ISSN | 1684-5315 |
Date | 2014 |
Library Catalog | Google Scholar |
Abstract | Batian is a true breeding commercial coffee variety that was released in Kenya in 2010. It is resistant to coffee berry disease and coffee leaf rust which are the main coffee diseases in Kenya. Coupled with early ripening, good beverage quality and high yields, demand for planting material has surpassed supply. Conventional propagation methods do not provide enough planting materials, hence the need to develop alternative methods. The objective of this study was to develop an effective in vitro protocol for propagating the coffee variety, Batian. Leaf explants were harvested and cultured on Murashige and Skoog (MS) media supplemented with different concentrations of cytokinins benzyl amino purine (BAP) and thidiazuron (TDZ) separately, 100 mg/l myo-inositol 3% sucrose and gelled with 0.3% gelrite. The results show differences among cytokinins levels in induction of somatic embryos. BAP at 13.3 µM gave the highest mean of embryos per explants, 6.06 ± 1.18 and highest percentage of embryogenic cultures of 58.33%. Development of somatic embryos was achieved on hormone free MS media with highest mean length of 0.32 ± 0.03 mm. Indole butyric acid at 9.8 µM was best for induction of a well-developed root system with a mean length of 1.22 ± 0.09 mm. This protocol opens new prospects for massive propagation of Batian in nine months. |
Date Added | 10/10/2021, 10:30:36 PM |
Modified | 10/18/2021, 10:46:56 PM |
Type | Journal Article |
---|---|
Author | D. Etienne-Barry |
Author | Benoît Bertrand |
Author | Nelly Vasquez |
Author | Hervé Etienne |
URL | https://pubmed.ncbi.nlm.nih.gov/30754735/ |
Volume | 19 |
Issue | 2 |
Pages | 111–117 |
Publication | Plant Cell Reports |
Date | 1999 |
Extra | Publisher: Springer |
DOI | 10.1007/s002990050720 |
Library Catalog | Google Scholar |
Abstract | The effect of germination conditions on the morphology of Coffea arabica L. somatic embryos mass-produced in a 1-l temporary immersion bioreactor (RITA®) was studied with emphasis on direct sowing in soil. Using germinated embryos, direct sowing resulted in a highly successful conversion of embryos into plants. A culture density above 1600 embryos per 1-l bioreactor positively affected embryo morphology by causing higher embryonic axis elongation (+4-5 mm). At this density, the addition of a high concentration of sucrose (234 mM) 2 weeks before sowing promoted an increase in effective plant conversion in soil (78%) and a vigorous vegetative growth of the resulting plants. Furthermore, direct sowing reduced handling time to 13% and shelving area requirements to 6.3% of the values obtained by conventional acclimatization of plants developed on gel media. |
Date Added | 10/10/2021, 10:30:36 PM |
Modified | 10/19/2021, 11:42:53 PM |
Type | Journal Article |
---|---|
Author | Asmini Budiani |
Author | Surip Mawardi |
URL | https://www.semanticscholar.org/paper/Confirmation-of-Transgenic-Robusta-Coffee-(Coffea-Priyono-Budiani/7ea22a4b2f7be7283bf9ab654f66640d65e11d95 |
Volume | 21 |
Issue | 2 |
Publication | Pelita Perkebunan (a Coffee and Cocoa Research Journal) |
Date | 2005 |
DOI | 10.22302/ICCRI.JUR.PELITAPERKEBUNAN.V21I2.16 |
Library Catalog | Google Scholar |
Abstract | Genetic engineering of Robusta coffee resistant to fungal diseases might be done by introducing a chitinase-encoding gene into genome of this plant. This research was aimed to confirm transgenic plant of BP 308 clone Robusta coffee transformed by chi gene and to evaluate its ability for the somatic embryogenesis. Confirmation of transgenic was carried out by analysis the presence of NPTII gene as a selectable marker for Canamysin resistant using PCR technique. The somatic embryo initiation and reproduction were evaluated in 11 plant accessions. Three kinds of sucrose concentration, 20%, 30% and 40% were applied in initiation stage of somatic embryo germination. The suitability of 4 medium, namely M1 (without addition by liquid medium), M2 (addition by liquid medium contained 0.25 mg/l kinetin), M3 (addition by liquid medium contained 0.25 mg/l IAA) and M4 (addition by liquid medium contained 0.25 mg/l GA3 ) was evaluated for somatic embryo maturation. The result showed that 8 out of 10 plant accessions tested were transgenic and they could be propagated through somatic embryogenesis. The ability of transgenic plant for somatic embryo initiation, reproduction and regeneration were similar with that of nontransgenic one. Germination of somatic embryo could be improved by using 40% sucrose. Maturation of somatic embryo could be improved by addition of fresh liquid medium on the ancient gelled medium that used for somatic embryos reproduction. The best result was obtained on addition of fresh medium contained 0.25 mg/l GA 3 in which 65% of the somatic embryos developed to pre-germinate somatic embryo. Key words: Coffea canephora, transgenic plant, somatic embryogenesis. |
Date Added | 10/10/2021, 10:30:36 PM |
Modified | 10/18/2021, 10:08:54 PM |
Type | Journal Article |
---|---|
Author | J. Arcila-Pulgarín |
Author | L. Buhr |
Author | H. Bleiholder |
Author | H. Hack |
Author | U. Meier |
Author | H. Wicke |
URL | https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1744-7348.2002.tb00191.x |
Volume | 141 |
Issue | 1 |
Pages | 19–27 |
Publication | Annals of Applied Biology |
Date | 2002 |
Extra | Publisher: Wiley Online Library |
DOI | 10.1111/j.1744-7348.2002.tb00191.x |
Library Catalog | Google Scholar |
Abstract | The extended BBCH (BBCH = Biologische Bundesantalt, Bundessortenamt and CHemische Industrie, Germany) scale and its associated decimal code were used to describe the growth stages of the coffee plant. Principal growth stages included germination and vegetative propagation, leaf development on the shoot of the young plant and branches of the tree, formation of branches, branch elongation, inflorescence and flower development, flowering, development of fruit, ripening of fruit and seed, and senescence. Secondary stages were also identified for each of the principal stages. Through a two digit decimal code, it is possible to identify the principal growth stages and their respective secondary stages. This scale will be of great help to coffee growers and researchers around the world for the more efficient planning of management practices and experiments. |
Date Added | 10/10/2021, 10:30:36 PM |
Modified | 10/18/2021, 9:20:05 PM |
Type | Journal Article |
---|---|
Author | Rina Arimarsetiowati |
URL | https://www.ccrjournal.com/index.php/ccrj/article/view/290 |
Volume | 33 |
Issue | 3 |
Pages | 156–167 |
Publication | Pelita Perkebunan (a Coffee and Cocoa Research Journal) |
Date | 2017 |
DOI | 10.22302/iccri.jur.pelitaperkebunan.v33i3.290 |
Library Catalog | Google Scholar |
Abstract | Most reliable and efficient protocol for Coffea arabica L. of Sigararutang variety plant regeneration was established using embryoid as an early explant from the induction of embryogenic callus phase. A completely randomized designs with 5 replications was designed to accomplish 20 protocols of embryo germina-tion methods with different steps of subculture, size of embryo and germination medium. The embryogenic calluses from the flush leave explant were induced embryoid on a half-strength MS medium fortified with a half-strength combina-tion vitamin of 1.8 mg/L nicotinic acid, 10.1 mg/L thiamin HCl and 3.1 mg/L pyri-doxine, 50 mg/L myo inositol, 33 mg/L L.cistein, 1 mg/L Kinetin, 0.1 mg/L NAA, 20 gr/L sucrose, 2.4 gr/L gelrite and pH 5.5.The result showed that Protocol 17 was the most effective, with 59,2% of rooted cotyledons, 4.04 cm of length of roots, 1.68 cm of length of hypocotyl, 20.8% of opened cotyledons and 100% of cotyledonary embryo at the end of 8 weeks which used the B medium, large embryos and twice phase of subculture from liquid medium to solid medium. The Protocol 17 is stable protocol from low to high value. Protocol 8 is the steady protocol from high to low value. Protocols 17 and 8 are the highest and lowest ranking, respectively, for each parameter. Protocol 17 is the most suitable for the germination embryo somatic |
Date Added | 10/10/2021, 10:30:36 PM |
Modified | 10/19/2021, 1:19:18 AM |
Type | Conference Paper |
---|---|
Author | D. Suhendra |
Author | S. Efendi |
Author | S. Aisyah |
Author | S. H. Y. Saragih |
URL | https://iopscience.iop.org/article/10.1088/1755-1315/741/1/012004/meta |
Volume | 741 |
Publisher | IOP Publishing |
Pages | 012004 |
Date | 2021 |
Extra | Issue: 1 |
DOI | 10.1088/1755-1315/741/1/012004 |
Library Catalog | Google Scholar |
Abstract | West Sumatra is one producing coffee region in Indonesia that contributes to the economy in Indonesia because unstable need expand. Optimizing generative propagation of coffee plants with gibberellin hormone treatment and different water temperatures on coffee seed germination stage. The research was conducted at the Seed Technology Laboratory Faculty Agriculture, Andalas University from July to September 2020. Research methods used randomized block design [RBD] with 2 treatments namely concentration hormone gibberellin and immersion water temperature differences. Measurement parameters are maximum growth potential [%], First Count Test [FCT] [%], and Index Value Test [IVT] [days]. All parameter observation results showed a significant effect on the treatment of gibberellin hormone concentration and water temperature treatment. G4S1 sample [the combination of 200 ppm gibberellin hormone concentration and room water temperature treatments] has resulted as the best treatment for all parameters. Respectively, 0.79 days for index value test, 76.67% for the first count test, and 85% for the maximum growth potential parameters. |
Proceedings Title | IOP Conference Series: Earth and Environmental Science |
Date Added | 10/10/2021, 10:35:58 PM |
Modified | 10/20/2021, 12:16:46 PM |
Extracted Annotations (10/20/2021, 10:08:48 PM)
"The research procedure is seed selection carried out by selecting physiologically ripe seeds and of good quality, namely the seed coat is dark red, has uniform size and color, the surface of the skin not defective, free from pests and diseases. After obtaining the required seed, namely, 720 robusta coffee seeds, cleaned the seed coat using a knife, while peeling the seed coat, do not injure the seed. Wash the peeled seeds with distilled water." (p. 12006)
"Robusta coffee seeds are soaked for 30 minutes in a cup containing the predetermined gibberellin hormone which has been labeled according to a predetermined concentration of 50 ppm, 100 ppm, 150 ppm, and 200 ppm. After soaking for 30 minutes with gibberellin hormone, previously soaking it with water temperature treatment for 30 minutes of Hardiyanto [5]." (p. 12007)
"The observation of normal sprouts showed that the highest first count test data was found in the G4S1 treatment, which was 76.67%. In table 2, the water temperature treatment has a significant effect, where the highest data is found in the S1 treatment, namely room temperature of 54.58%, and the lowest data is in the S2 and S3 treatments, namely 0.00%." (p. 12008)
"In this case, the room temperature condition in the first count test is the best at room temperature, which is 54.58%, where the temperature conditions being heated at 60 °C and 90 °C can cause the seeds to damage the embryo and endosperm and cause the coffee seeds not to germinate. and some of the seeds are damaged so that abnormal growth occurs." (p. 12008)
"Index Value Test, First Count Test, and Maximum Growth Potential highest was the treatment of 200 ppm gibberellin hormone concentration. with room water temperature [G4S1] namely 0.79 days, 76.67 %, and 85.00 %." (p. 12009)
Type | Journal Article |
---|---|
Author | V. Rani |
Author | K. P. Singh |
Author | B. Shiran |
Author | S. Nandy |
Author | S. Goel |
Author | R. M. Devarumath |
Author | H. L. Sreenath |
Author | S. N. Raina |
URL | https://link.springer.com/article/10.1007/s002990000228 |
Volume | 19 |
Issue | 10 |
Pages | 1013–1020 |
Publication | Plant Cell Reports |
Date | 2000 |
Extra | Publisher: Springer |
DOI | 10.1007/s002990000228 |
Library Catalog | Google Scholar |
Abstract | The most important commercial species of coffee, Coffea arabica, which produces 73% of the world's coffee crop and almost all of the coffee in Latin America, is the only tetraploid (allotetraploid, 2n=4x=44) species known in the genus. High-frequency somatic embryogenesis, plant regeneration and plant recovery were achieved from leaf explants of a mature, elite plant of C. arabica cv. Cauvery (S-4347) using a two-step culture method. To assess the genetic integrity of the nuclear, mitochondrial and chloroplast genomes among the hardened regenerants, we employed multiple DNA markers (RFLP, RAPD, ISSR) for sampling various regions of the genome. Although the nuclear and mitochondrial genomes of the mother plant and five ramets derived from the mother ortet were similar in organization, this was not so in the somatic embryo-derived plants where both nuclear and mitochondrial genomes changed in different, characteristic ways and produced novel genome organizations. A total of 480 genetic loci, based on the data obtained from a total of 16 nuclear, mitochondrial and chloroplast gene probes, in combination with nine restriction enzyme digests, 38 RAPD and 17 SSR primers, were scored in 27 somatic embryo-derived plants and the single control. Among these, 44 loci were observed to be polymorphic. A relatively low level of polymorphism (4.36%) was found in the nuclear genome, while polymorphism in the mitochondrial genome (41%) was much higher. No polymorphism was detected in the chloroplast genome. The polymorphism in the mitochondrial genome was found in only 4 plants. Such selective polymorphism was not true for the nuclear genome. Thus, this in-depth and comprehensive study demonstrates, for the first time, the presence of subtle genetic variability and novel genome organizations in the commercially well-established somatic embryogenesis-derived plants of this important coffee species. |
Date Added | 10/10/2021, 10:35:58 PM |
Modified | 10/20/2021, 3:53:27 PM |
Type | Journal Article |
---|---|
Author | Ameen AL-Azab |
Author | Sanad Habib |
Author | Mohammed Hussein |
Author | Fadia El-Sherif |
URL | https://hjsc.journals.ekb.eg/article_6472.html |
Volume | 4 |
Issue | 1 |
Pages | 25–31 |
Publication | Hortscience Journal of Suez Canal University |
Date | 2015 |
Extra | Publisher: Scientific Society of Agricultural Sciences |
DOI | 10.21608/hjsc.2015.6472 |
Library Catalog | Google Scholar |
Abstract | The aim of this study is to optimize in vitro multiplication of Coffea arabica cvs 'Benan',' Burai',' Odayni' and 'Odayni- Bayat'. Seeds germinated on modified quarter MS medium with 1.0 g l−1 activated charcoal gave the highest germination percentage of the four cultivars under study. BA at 8.0 mgl-1 was the most effective concentration with an average of 14 shoots per explant, resulting in better and morphologically superior microshoots in 'Benan' cv. However 'Burai' ,'Odayni' and 'Odayni- Bayat' cultivars, showed the highest number of shoots when they were grown on MS medium supplemented with BA at 4.0, 2.0 and 6.0 mgl-1 respectively. Root formation was 100% in response to the application of IAA, IBA and /or NAA to the culture media for the four cultivars. Half MS supplemented with NAA at 2.0, 1.0 and 3.0 mgl-1 was found to be a suitable medium for root induction in excised micro-shoots, of 'Odayni', 'Burai' and 'Odayni-Bayat' cultivars, respectively. The plantlets were successfully acclimatized in the greenhouse; consequently the survived plants reached 100%. |
Date Added | 10/10/2021, 10:35:58 PM |
Modified | 10/20/2021, 12:15:31 AM |
Type | Conference Paper |
---|---|
Author | Marc Berthouly |
Author | Pierre Charmetant |
Author | Benoît Bertrand |
Author | Dominique Barry-Etienne |
Author | Nelly Vasquez |
Author | Marc Lartaud |
Author | N. Nyange |
Author | Hervé Etienne |
URL | https://agritrop.cirad.fr/485959/ |
Date | 2001 |
Extra | Publisher: CATIE, Turrialba (Costa Rica) |
Library Catalog | Google Scholar |
Conference Name | 19. Internationales wissenschaftliches Kolloquium über Kaffee |
Language | fr |
Abstract | Varietal improvement of Coffea arabica is moving, in many countries, towards the production and selection of vigorous, productive hybrids, giving a quality product and possessing genes for resistance to the main diseases and pests. To assess these heterozygous structures in full scale and propagate them on a large scale, CIRAD has developed a method of mass propagation by somatic embryogenesis based on the use of temporary immersion bioreactors and direct sowing of embryos ex vitro. This process has been used successfully in three different situations: i) breeding stock of the nematode tolerant 'Nemaya' rootstock variety in Central America; ii) propagation of selected hybrids in Central America and Tanzania. 50,000 plants - seed fields and multi-local assessment trial network - have been established in five Central American countries. 200,000 plants resulting from this process are to be planted in Central America and Tanzania. These productions made it possible to optimize the different phases of the process and to assess on a large scale the genetic conformity of the regenerated material. (Author's summary) |
Proceedings Title | Dix-neuvième colloque scientifique international sur le café. |
Date Added | 10/10/2021, 10:35:58 PM |
Modified | 10/19/2021, 11:39:29 PM |
Type | Journal Article |
---|---|
Author | Mariana Cansian Sattler |
Author | Carlos Roberto Carvalho |
Author | Wellington Ronildo Clarindo |
URL | https://www.jstage.jst.go.jp/article/cytologia/81/2/81_MS1720/_article |
Volume | 81 |
Issue | 2 |
Pages | 125–132 |
Publication | Cytologia |
Date | 2016 |
Extra | Publisher: Japan Mendel Society, International Society of Cytology |
DOI | doi.org/10.1508/cytologia.81.125 |
Library Catalog | Google Scholar |
Abstract | Híbrido de Timor” (HT) is a natural interspecific hybrid of Coffea arabica L. with Coffea canephora Pierre ex Froehner that has played a substantial role in breeding programs as source of resistance genes. The original HT plant is represented by the anorthoploid accession ‘CIFC 4106’, an allotriploid plant with 3x=33 chromosomes and 2C=2.10 pg. From this HT plant, other accessions have been obtained and used in crossings with C. arabica to provide resistant plants to the main pathogens. However, each HT accession and their derivates show a particular karyotype due to irregular anaphasic disjunction, which results in a few reproductive cells with an unbalanced number of chromosomes. Regarding this fact and the crop relevance of HT, this study aimed to develop a direct somatic embryogenesis system for the clonal propagation of this germplasm, using the first HT plant as explant donor. To accomplish this purpose, disinfested leaf explants of greenhouse-cultivated HT ‘CIFC 4106’ plants were inoculated in medium supplied with 0.001 g L−1 6-benzylaminopurine. Somatic embryogenesis process was asynchronous, with distinct developmental stages occurring simultaneously. Besides, emergence of secondary embryos from primary ones was observed. Mature embryos were germinated, and well-rooted embryos were selected for plantlet regeneration. The nuclear DNA content and the karyotype showed that allotriploidy was conserved in all regenerated plantlets. Considering these results, the direct somatic embryogenesis protocol adopted in the present work was imperative for the accurate clonal propagation of HT, being relevant for multiplication and conservation of elite accessions that show an irregular meiosis. |
Short Title | Regeneration of allotriploid Coffea plants from tissue culture |
Date Added | 10/10/2021, 10:35:58 PM |
Modified | 10/19/2021, 11:56:12 PM |
Type | Journal Article |
---|---|
Author | G. J. Hakiza |
Author | D. T. Kyetere |
Author | M. Erbaugh |
Author | H. Warren |
Author | S. Olal |
URL | https://www.ajol.info/index.php/ujas/article/view/135575 |
Volume | 9 |
Issue | 1 |
Pages | 714–717 |
Publication | Uganda Journal of Agricultural Sciences |
ISSN | 2410-6909 |
Date | 2004 |
Library Catalog | Google Scholar |
Abstract | A study was carried out to determine whether or not Fusarium xylarioides (= Gibberella xylarioides) could be transmitted by infested seed of robusta coffee (Coffea canephora Pierre). Seeds were collected from symptomatic and asymptomatic plants from various robusta coffee growing districts in Uganda and from experimental fields at the Coffee Research Institute (CORI), based at Kituza in Mukono district. A total of 43 seed samples from 13 districts were collected between 2000 and 2003. To test for presence of the wilt pathogen, the seeds were separated into two groups. The first group of seeds were surface sterilised and the second group were not sterilised. Both seed categories were plated on blotter, agar plates or planted in sterile sand beds. Fungi detected on seeds plated on blotter and agar plates, from both sterilised and unsterilised seeds were Fusarium stilboides, F. lateritium, Aspergillus ochraceous, A. niger, A. flavus, Colletotrichum gloeosporioides and other unidentified fungi. F. xylarioides was not detected by either blotter or agar plate methods. Seed germination varied between 30 – 50% for seeds from wilted trees compared to 76 – 85% for seeds from healthy trees. Although plants from diseased mother trees remained stunted no wilt pathogen was recovered from them 3 years from planting. All tests were negative for the coffee wilt pathogen, indicating that F. xylarioides is not seed transmitted and that the rapid spread of the disease throughout the robusta districts cannot be attributed to the use of seeds for propagation. |
Date Added | 10/10/2021, 10:35:58 PM |
Modified | 10/20/2021, 6:19:21 PM |
Type | Conference Paper |
---|---|
Author | E. A. Adeyemi |
Author | R. R. Ipinmoroti |
Publisher | Association Scientifique Internationale du Café (ASIC) |
Pages | 1080–1083 |
Date | 2007 |
Library Catalog | Google Scholar |
Proceedings Title | 21st International Conference on Coffee Science, Montpellier, France, 11-15 September, 2006 |
Date Added | 10/10/2021, 10:39:35 PM |
Modified | 10/10/2021, 10:39:35 PM |
Type | Journal Article |
---|---|
Author | K. E. Dada |
Author | C. F. Anagbogu |
Author | B. P. Forster |
Author | A. A. Muyiwa |
Author | O. O. Adenuga |
Author | O. O. Olaniyi |
Author | S. Bado |
Volume | 12 |
Issue | 6 |
Pages | 122–128 |
Publication | African Journal of Plant Science |
ISSN | 1996-0824 |
Date | 2018 |
Extra | Publisher: Academic Journals |
DOI | 10.5897/AJPS2016.1504 |
Library Catalog | Google Scholar |
Abstract | Coffee is the second most valuable commodity exported by developing countries, and supports the livelihood of more than 75 million people. There are limitations to preference for established cultivars due to the autogamous nature of the crop thereby making improvements via conventional breeding of many years to produce a new cultivar difficult. Mutation breeding can overcome these obstacles. One of the first steps in mutation breeding is to determine radio-sensitivity so that optimal irradiation treatments can be determined. Three cultivars: Kents, Mundo novo and Geisha were sourced from the coffee germplasm collection at the Mambilla Plateau substation of the institute, Taraba State, Nigeria. The biological effect of the physical was studied in the selected cultivars of Coffea arabica after the rooted seedlings were treated with various doses of Gamma rays: 0, 5, 10, 15, 20 and 25 Gy. Success takes percentage and seedling vigour were used as measures of radio-sensitivity at 4 weeks after settings (WAS), 8, 12, and 16 WAS. The results showed that genotype of the cultivars and dosage of irradiation significantly influenced response to irradiation treatments (p < 0.05). The effect of the irradiation on treated cultivars was inversely proportional to the emergence of the success takes, plant height, root length, number of roots and number of leaves. The optimal mutation treatment (LD50) of M1V1 cuttings was in the range of 12 Gy in all the treated Arabica varieties an indication to buttress the narrow genetic base with reference to the similarity of their evolutionary trends. This work provides data on dose treatments for mutation induction in coffee, which may be exploited for coffee improvement. |
Date Added | 10/10/2021, 10:39:35 PM |
Modified | 10/11/2021, 9:08:20 PM |
Type | Conference Paper |
---|---|
Author | E. A. A. da Silva |
Author | A. Chalfun Júnior |
Author | L. V. Paiva |
URL | https://www.asic-cafe.org/conference/21st-international-scientific-colloquium-coffee/genes-associated-coffee-coffea-arabica |
Publisher | Association Scientifique Internationale du Café (ASIC) |
Pages | 739–741 |
Date | 2007 |
Library Catalog | Google Scholar |
Proceedings Title | 21st International Conference on Coffee Science, Montpellier, France, 11-15 September, 2006 |
Date Added | 10/10/2021, 10:39:35 PM |
Modified | 10/19/2021, 1:12:47 AM |
Type | Journal Article |
---|---|
Author | M. de L. Resende |
Author | TT de A. Silva |
Author | Renato Mendes Guimarães |
Author | A. A. da Silva |
URL | https://www.semanticscholar.org/paper/Influence-of-light-and-gibberellin-on-the-velocity-Resende-Silva/8fda1f6b665f2faea8b7b740f5d7844b85530e98 |
Volume | 4 |
Issue | 2 |
Pages | 149–154 |
Publication | Coffee Science |
Date | 2009 |
Extra | Publisher: Coffee Science, Universidade Federal de Lavras |
DOI | 10.25186/CS.V4I2.179 |
Library Catalog | Google Scholar |
Abstract | There are various factors that interfere with seed germination. In this research the effect of light, gibberellins and paclobutrazol in coffee seed germination were evaluated. Seeds of coffee (Coffea arabica L.) from cultivar Rubi harvested at the developmental stage known as cherry were dried until 12% of water content. The first trial was performed in factorial design (2x2), the condtions being two (light and dark), presence and absence of gibberellins. The substrate was imbibed with 20 ml of GA3 (100 mM) and the control treatment with distillated water. The second trial was performed in factorial design (4x2x3), with four concentrations of paclobutrazol (0; 0,1;1,0; and 10 mM), two conditions (light and dark) and three storage conditions (0, 4 and 8 months). The substrate was imbibed with 20 mL of paclobutrazol and the control treatment with distillated water. Both trials were performed in four replications of fifty seeds. Seed sowing was performed in gerbox tray with two blotting papers and one germitest paper. The dark condition was created by wrapping the gerbox with an aluminum foil. The germiantion velocity rate, germination at thirty days and the time to 50% root protrusion were evaluated. The gibberellin treatment in seed coffee decreases the germination velocity rate and percentage of germination. The gibberellin inhibitor decreases the gemination velocity rate but it did not reduce the effect of light. High values of germination velocity rate were observed in dark. |
Date Added | 10/10/2021, 10:39:35 PM |
Modified | 10/12/2021, 4:38:59 PM |
Silva et al. (2005) and Válio (1976) observed that coffee seeds germinate faster in absence of light. The inhibitory effect of light occurs because it increases the synthesis of gibberellins, and consequently, the production of the enzyme endo-b- mananse. The production of excess mannose, derived from the hydrolysis of reserve hemicelluloses by endo-b-mannanase, probably contributes to the stoppage of germination.
The research was carried out at the Laboratory of Department of Agriculture Seed Analysis of the Federal University of Lavras, MG. Were used seeds of Coffea arabica L., cultivar Ruby, from the experimental area of improvement of the UFLA coffee tree. the fruits were hand-picked at the cherry stadium, pulped in manual pulper and demucilated by natural fermentation in water for 24 hours in room temperature. Then the seeds were washed and dried in the shade, on paper multifoliate.
The water content was monitored until the seeds reach 12% humidity. the seeds were stored in paper containers and placed in a cold and dry room (10°C and 60% RH) for 8 months.
Test I: Gibberellin and light in the germination of
coffee seeds.
Sowing was carried out in acrylic boxes gerbox type, with seeds without parchment, over two sheets of blotting paper and under one sheet of germitest paper, moistened with 20 mL of solution of GA3 (100M). The substrate of the witness was moistened with distilled water. the imbibition of seeds was made in light or dark conditions, with gerbox wrapped in aluminum foil. Each gerbox was wrapped in a polyethylene bag, to keep moisture, and placed in a germinator at 30°C.Assay II: endogenous gibberellins in germination of coffee seeds.
Sowing was carried out in gerbox, as described above. The substrate was moistened with 20 ml of the synthesis blocker solution of gibberellin, paclobutrazol.
Regardless of the light, there was no difference between germination speeds of seeds soaked with water. On the other hand, to the seeds soaked with gibberellin solution 100 µM, the absence of light favored a higher index of germination speed.
Thus, although the protrusion in the dark has occurred with greater speed, the number of seedlings normals was lower at the end of the test.
When the seeds were soaked in water, regardless of the environment, was observed a percentage of 91% of germination, against 48% those soaked in GA solution 100 µM.
According to these authors, this fact occurred due to the increase in the activity of enzymes such as cellulase, provided by acid Gibberellic, which, in this case, acted degrading the cell wall of the embryo.
As concentration increased of the gibberellin synthesis blocker, it was observed the increase in the number of days needed for 50% of the seeds germinated (Figure 1).
Similar results were also observed in the germination speed index, that is, there was a reduction as the concentration of paclobutrazol was increased (Figure 1).
After four months of storage, there was behavior similar to the results obtained before storage, that is, in the dark, there was higher germination speed and shorter time for obtaining 50% germination.
Paclobutrazol does not reduce the effect of light on germination speed.
Type | Journal Article |
---|---|
Author | Fitria Ardiyani |
Author | Edy Setiti Wida Utami |
Author | Hery Purnobasuki |
URL | https://ccrjournal.com/index.php/ccrj/article/view/460 |
Volume | 37 |
Issue | 1 |
Publication | Pelita Perkebunan (a Coffee and Cocoa Research Journal) |
Date | 2021 |
DOI | 10.22302/iccri.jur.pelitaperkebunan.v37i1.460 |
Library Catalog | Google Scholar |
Abstract | Coffea liberica is a variety of coffee that tolerant to marginal land, especially peatlands. One of propagation methods in C. liberica is somatic embryogenesis(SE) which producing large number of true-to-type plant seedlings in a short time. This research aimed at studying the effect of application of plant growthregulator (PGR) on quality and weight of somatic embryo of C. liberica. Somatic embryo in development stage was induced by Murashige and Skoog medium containing cytokinin as benzyl amino purin (BAP) and auxin as 2,4-dichlorophe-noxyacetic acid (2,4-D). While cotyledonary embryo in germination stage was induced by Murashige and Skoog medium containing cytokinin (BAP) and auxins as 2,4-D, indole acetic acid (IAA) and naphthaleneacetic acid (NAA). The resultsshowed that the application of auxins and cytokinins on development stage affected the formation of embryos, texture of calli, color of calli and embryos, and weight of somatic embryo. It also influenced the shoot and root formation, color and weight of geminating embryos of C. liberica at the germinating stage. During the development stage, addition of 1 mg/L BAP in the absence of 2,4-D in MS medium produced the highest quality of somatic embryo of C. liberica. This medium also produced heaviest somatic embryos but with lighter callus. While in germination stage, all medium treatments produced a typical germinating embryo. Coffea liberica germinating embryo growth optimally on MS medium containing 0.5 mg/L BAP as a single chemical or 0.5 mg/L BAP in combination with 0.5 mg/L IAA for shooting development. Whereas on rooting development, addition of 0.5 mg/L NAA on MS medium produced an optimal germinating embryo. Moreover, germination embryo of C. liberica recorded the highest in terms of dry weight on MS media with addition of 0.5 mg/L BAP. Application of appropriate concentration of auxin and cytokinin is needed to support the formation of somatic embryo and germinating embryo. |
Date Added | 10/10/2021, 10:39:35 PM |
Modified | 10/20/2021, 12:21:21 AM |
Type | Conference Paper |
---|---|
Author | Hervé Etienne |
Author | Benoît Bertrand |
Author | Alessandra Ribas |
Author | Philippe Lashermes |
Author | Eduardo Malo |
Author | Christophe Montagnon |
Author | Edgardo Alpizar |
Author | R. Bobadilla |
Author | J. Simpson |
Author | Eveline Dechamp |
URL | https://agritrop.cirad.fr/562986/ |
Place | Suwon, Republic of Korea |
Publisher | IUFRO |
Date | 2010 |
Library Catalog | Google Scholar |
Conference Name | Somatic Embryogenesis of Trees |
Abstract | Of ail the possible micropropagation techniques, it is widely accepted that vegetative propagation by somatic embryogenesis is by far the most promising for rapid, large-scale dissemination of elite individuals. Yet, to date, examples of somatic embryogenesis processes applied on an industrial scale are very few and far between. There are many complications. They usually involve a major genotypic effect, particularly for obtaining embryogenic tissues, or are related to the quality of regenerated somatic embryos, the incidence of somaclonal variation and, more generally, a lack of reproducibility and efficiency at certain stages of the process, leading to production costs that are prohibitive. Research on coffee somatic embryogenesis began at the end of the 1970s at various institutes, including CIRAD. Between 1995 and 2001, CIRAD moved the technique forward from a research laboratory scale to a technique enabling industrial dissemination of extremely promising Coffea arabica F1 hybrids. Over that period, two technological innovations made technology transfer economically feasible: mass production of somatic embryos in temporary immersion bioreactors and the possibility of sowing them directly in the nursery. At the same time, reassuring data were obtained on the genetic conformity of regenerated plants (somaclonal variation frequency < 3%). In 2002, in partnership with the ECOM group, CIRAD decided to transfer the somatic embryogenesis method on an industrial scale to Central America so that four Arabica hybrid clones, that were selected for agroforestry-based farming systems, could be disseminated throughout that part of the world. This article describes the different stages and the difficulties we had to overcome before successful technology transfer could occur in 2010. . It describes one of the first examples of somatic embryogenesis technology applied on a commercial scale. |
Proceedings Title | Proceedings of the IUFROM Working Party |
Date Added | 10/10/2021, 10:39:35 PM |
Modified | 10/20/2021, 5:35:54 PM |
Type | Book Section |
---|---|
Author | J. P. Ducos |
Author | B. Florin |
Author | J. M. Dupuis |
Author | V. Pétiard |
URL | https://link.springer.com/chapter/10.1007/1-4020-3200-5_32 |
Publisher | Springer |
Pages | 415–423 |
Date | 2005 |
Extra | 10.1007/1-4020-3200-5_32 |
Library Catalog | Google Scholar |
Abstract | Somatic embryos of Daucus carota L. and Coffea canephora L. (var. Robusta) were dehydrated under a 43 % relative humidity then placed in the hopper of a precision seeding system used in the transplant industry. The seeder was adjusted to distribute the embryos onto horticultural trays, each one containing 240 cells filled with soil. As a preliminary result, 72 % and 88 % of the individual cells received a single embryo, in Daucus and Coffea respectively. The embryo-to-plantlet conversion rate was not affected either by the vibration of the hopper or by the nozzles. In carrot 66 % of the embryos germinated after the use of the seeding system (62% germination for the control). Sorting methods traditionally used for the seeds (e.g. air column, vibrating table) can also be used. Such an approach, based on desiccation as a key step, has the potential for a complete automation of the large-scale handling and delivery of somatic embryos. |
Book Title | Liquid culture systems for in vitro plant propagation |
Short Title | A new approach for automation |
Date Added | 10/10/2021, 10:48:39 PM |
Modified | 10/18/2021, 8:03:39 PM |
Type | Journal Article |
---|---|
Author | F. Afreen |
Author | S. M. A. Zobayed |
Author | T. Kozai |
URL | https://academic.oup.com/aob/article/90/1/21/196744 |
Volume | 90 |
Issue | 1 |
Pages | 21–29 |
Publication | Annals of botany |
Date | 2002 |
Extra | 00074 Publisher: Oxford University Press |
DOI | 10.1093/aob/mcf151 |
Library Catalog | Google Scholar |
Abstract | Somatic embryos were developed from in vitro‐grown leaf discs of Coffea arabusta in modified Murashige and Skoog medium under 30 µmol m–2 s–1 photosynthetic photon flux (PPF). Cotyledonary stage embryos were selected from the 14‐week‐old cultures and were placed under a high (100 µmol m–2 s–1) PPF for 14 d. These pretreated embryos were grown photoautotrophically in three different types of culture systems: Magenta vessel; RITA‐bioreactor (modified to improve air exchange); and a specially designed temporary root zone immersion bioreactor system (TRI‐bioreactor) with forced ventilation. The aims of the study were to achieve large‐scale embryo‐to‐plantlet conversion, and to optimize growth of plantlets under photoautotrophic conditions. The plantlet conversion percentage was highest (84 %) in the TRI‐bioreactor and lowest in the modified RITA‐bioreactor (20 %). Growth and survival of converted plantlets following 45 d of photoautotrophic culture in each of the three culture systems were studied. Fresh and dry masses of leaves and roots of plantlets developed in the TRI‐bioreactor were significantly greater than those of plantlets developed in the modified RITA‐bioreactor or Magenta vessel. The net photosynthetic rate, chlorophyll fluorescence and chlorophyll contents were also highest in plantlets grown in the TRI‐bioreactor. Normal stomata were observed in leaves of plantlets grown in the TRI‐bioreactor, whereas they could be abnormal in plantlets from the modified RITA‐bioreactor. Survival of the plants after transfer from culture followed a similar pattern and was highest in the group grown in the TRI‐bioreactor, followed by plants grown in the modified RITA‐bioreactor and Magenta vessel. In addition, ex vitro growth of plants transferred from the TRI‐bioreactor was faster than that of plants from the other culture systems. |
Short Title | Photoautotrophic culture of Coffea arabusta somatic embryos |
Date Added | 10/10/2021, 10:48:56 PM |
Modified | 10/20/2021, 12:14:00 AM |
Type | Journal Article |
---|---|
Author | Girma Yared |
Author | Wolka Kebede |
Volume | 7 |
Issue | 6 |
Pages | 315–323 |
Publication | International Journal of Agricultural Research |
Date | 2012 |
Extra | 00001 Publisher: Academic Journals Inc. |
DOI | 10.3923/ijar.2012.315.323 |
Library Catalog | Google Scholar |
Abstract | In most Coffea arabica growing areas of Ethiopia, A. gummifera, C. africana and M. ferruginea are among the commonly used shade trees. The role of these species on germination of C. arabica seed has been little studied. This study assessed the impacts of these tree species’ leaf litter on C. arabica seed germination. The leaf litter was collected from mature standing and naturally growing plants, air dried and ground. Seed from C. arabica plant was collected and prepared. The ground leaf litter of each species was uniformly mixed with nursery bed soil in proportion of 50, 100 and 200 g m-2. Complete random block design with three replications were applied. Hundred undamaged seeds were randomly chosen and sown in uniform spacing within each plot (1 m-2). Rate of seed germination was recorded after 60, 90 and 120 days from the sowing date. Variations were analyzed using LSD method for one way ANOVA at alpha 0.05. The result showed that after 60 days of sowing, a significantly higher germination was observed in Ag2, Ag3, Ca1, Mf2 and Mf3 compared to the control. After 90 and 120 days of sowing, no significant variation was observed between control and treatments. From the results, it was concluded that leaf litter of the studied tree species stimulate germination of C. arabica seed in field condition, however, the level is not linearly related with germination rate. In situations where early, uniform and high germination rates are required, leaf litter of these species, preferably: Ag1, Ag3, Ca1, Mf2 and Mf3, can be used. |
Date Added | 10/10/2021, 10:48:56 PM |
Modified | 10/17/2021, 10:40:05 PM |
The donor plants' leaf litter was collected from mature and naturally growing plants within the college compound. The leaves were air dried and ground in the Wondo Genet College of Forestry and Natural Resources laboratory.
Finally, the ground leaf litter was uniformly mixed with soil
Seeds of Coffea arabica were sown the same day the leaf litter was mixed with the nursery bed soil, which occured in May 2011. One hundred undamaged seeds were randomly chosen from the collected seeds and sown using uniform spacing within each plot (1 m-2 areas). The plot was mulched with dried grass (common nursery mulch) in sufficient thickness.
In this phase [60 days from sowing], none of the treatments has less germination than the control.
The variation between control and treatments with various level of leaf litter of three agroforestry species was insignificant [at 90 days from sowing].
no significant variation was observed between control and the various levels of incorporated leaf litter from the three agroforestry species under consideration [at 120 days from sowing].
Type | Journal Article |
---|---|
Author | M. Coa Urbaez |
Author | J. R. Mendez Natera |
Author | R. Silva Acuña |
Author | S. Mundarain Padilla |
URL | https://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292014000100006 |
Volume | 32 |
Issue | 1 |
Pages | 43–53 |
Publication | IDESIA |
Date | 2014 |
Extra | 00000 Publisher: Facultad de Ciencias Agronómicas, Universidad de Tarapacá Evaluación de métodos químicos y mecánicos para promover la germinación de semillas y producción de fosforitos en café (Coffea arábica) var. Catuaí Rojo |
DOI | 10.4067/S0718-34292014000100006 |
Library Catalog | Google Scholar |
Language | es |
Abstract | The experiment was carried out in the open at the Escuela Técnica Robinsoniana Aragua de Maturin, located in the capital of Piar municipality Monagas State in order to evaluate the effect of different coffee seed scarification treatments on germination and formation of match seedlings. Selected coffee seeds of variety Catuai Red from Instituto Nacional de Investigaciones Agrícolas were used. Washed river sand was used as a substrate, it was disinfected with boiling water and put in garden type trays 12 x 40 x 15 cm. The three treatments with mechanical scarification were without water immersion and immersion for 24 and 48 hours, all six treatments employing chemical stratification with battery acid (Copper®) and muriatic acid (Opin®) for 10, 20 and 30 minutes of immersion; moreover, two treatments with immersion in water for 24 and 48 hours and the control treatment was the used one for coffee producer (without scarification and immersion). The experimental design was a randomized complete block with 12 treatments and four replications. The experimental unit consisted of 50 seeds. Evaluations were carried out at 25, 30, 40 and 50 days after sowing (DAS). Treatments where coffee seeds were subjected to mechanical scarification and water immersion for 24 and 48 hours showed the highest values of germination and formation of match seedlings, in which, it was found that over 60% of germination occurred at 25 days and formation of match seedlings occurred at 30 DAS. Chemical scarification treatments using commercial products with muriatic acid and battery acid did not have any advantage in relation to the control. |
Date Added | 10/10/2021, 10:48:56 PM |
Modified | 10/20/2021, 12:31:49 AM |
however, the seeds coffee lacks a latency period, although the presence of the endocarp delays germination.
Seeds with endocarp present germinate between the 50 and 75 days, being that its removal accelerates the germination in 20 days (Valio, 1980).
The fact that coffee beans have a very long germination period has caused that many coffee growers justify the purchase of seedlings to local nurserymen
Coffee seeds ( Coffea arabica ) var. "Red Catuaí", from the National Institute of Agricultural Research, Local Experimental Station Caripe (INIA-Caripe), intended for commercialization as seeds selected.
Washed sand was used as substrate river that previously underwent disinfection with hot water at 100 ºC. The seeds were buried the day after heat treatment of the substrate and were placed 1 cm deep. Irrigation is carried out on an interday basis.
The experimental unit consisted of 50 seeds, buried in 12 x 40 x 15 cm plastic planters, for a total of 48, which were kept under the open sky.
The seeds were physically scarified using a commonly used metal grater for the homemade grating (cheese, carrot, bread, etc.) These treatments consisted of submerging the seeds in water without removing the parchment or endocarp for a time of 24 and 48 hours, they were then buried for evaluation.
In this trial the seeds were scarified by immersion in battery acid (sulfuric acid 20%) and muriatic acid (hydrochloric acid 10%) for 10, 20 and 30 minutes.
Concluded the periods of immersion in each of the acids, the seeds were washed in running, potable water, for five minutes, under laboratory conditions, with the aim of removing residues from them and later they dried in the shade and were buried.
The seed was buried in the substrate without removing the parchment or endocarp and without immersion in water (Amaya, et al. , 1988; Medina et al. , 1987) or acid and without mechanical scarification
Mechanical scarification treatments with immersion in water for 24 and 48 hours presented the highest percentage of germination in all evaluation times (25, 30, 40 and 50 days later of buried seeds) (Table 3), followed by the mechanical scarification without immersion in water, which presented higher germination percentages to the rest of the treatments.
The treatments of immersion in water, battery acid and muriatic acid showed germination percentages similar to control at all evaluation times (Table 3).
And immersion in water for 24 and 48 hours (INM-WATER / 24h and INM-WATER / 48h) did not show differences between them, which suggests that the action of the acid was not effective enough for the removal of endocarp.
Valio (1980) indicated that the presence endocarp drastically inhibits germination of coffee beans.
In this regard, Fontanibe (1987) reported that the parchment does not influence the imbibition of water, but possibly constitutes a barrier to diffusion of oxygen, causing a delay and a decrease in total germination and that the most high germination percentages were associated to total scarification treatments of the parchment with electric scarifier and 60% atmosphere oxygen, while mechanical scarification with the Bentall pulper effectively removed the parchment from the seed, but causes damage to the embryo and immersing the seeds in boiling water affected the embryo causing total loss of germination.
Treatments where coffee seeds are subjected to mechanical scarification plus immersion in water for 24 and 48 hours had the highest germination values and phosphorite formation. Sixty percent of germination occurred at 25 days and phosphorite formation occurred at 30 days of buried the seeds.
Chemical scarification treatments using commercial acid products muriatic (Opin®) and battery (Copper®) no They offered advantages over the witness.
Type | Book Section |
---|---|
Author | Francisco Quiroz-Figueroa |
Author | Miriam Monforte-González |
Author | Rosa M. Galaz-Ávalos |
Author | Victor M. Loyola-Vargas |
URL | https://link.springer.com/protocol/10.1385/1-59259-959-1:111 |
Publisher | Springer |
Pages | 111–117 |
Date | 2006 |
Extra | 10.1385/1-59259-959-1:111 |
Library Catalog | Google Scholar |
Abstract | Somatic embryogenesis (SE) provides a useful model to study embryo development in plants. In contrast to zygotic embryogenesis, SE can easily be observed, the culture conditions can be controlled, and large quantities of embryos can be easily obtained. In Coffea spp several model systems have been reported for in vitro SE induction. SE for coffee was first reported in Coffea canephora. Several systems have been developed since then, including SE from callus cultures derived from leaf explants; a two-phase experimental protocol for SE from leaves of Coffea arabica; and from leaf explants of Arabusta or C. arabica using a medium with cytokinins. Here we report a protocol using young leaves from in vitro seedling pre-conditioned with growth regulators. This is a simplified method to obtain a faster and more efficient protocol to produce direct somatic embryos in C. canephora. |
Book Title | Plant cell culture protocols |
Date Added | 10/10/2021, 10:48:56 PM |
Modified | 10/20/2021, 4:10:55 PM |
Type | Conference Paper |
---|---|
Author | J. Girón |
Author | E. E. López de León |
Place | Tapachula, Mexico |
Publisher | Programa Cooperativo para la Protección y … |
Date | 1988 |
Extra | 00000 |
Library Catalog | Google Scholar |
Conference Name | 10. Simposio sobre Caficultura Latinoamericana |
Language | sp |
Abstract | Presents the results obtained from an investigation carried out by technicians from ANACAFE of Guatemala regarding the evaluation of the germination of the Robusta variety (Coffea canephora) at five temperatures for two periods of time and compared with the Caturra variety (Coffea arabica) in the area. of Pueblo Nuevo Viñas, Santa Rosa Department in Guatemala. The main objective was to provide a technique for obtaining grafting materials (patterns) in an anticipated way to that which normally or naturally occurs in any coffee bean. The aim was to find early germination of the Robusta coffee variety, for hypocotyledon grafting purposes (Reyna Method). The research concluded after the analysis of results that: the methodology of acceleration of germination by means of temperature as a function of time, is not functional and therefore its use is not recommended. (ACH) |
Date Added | 10/10/2021, 10:48:56 PM |
Modified | 10/20/2021, 5:52:34 PM |
Type | Journal Article |
---|---|
Author | Francisco Javier López-García |
Author | Juan Guillermo Cruz-Castillo |
URL | http://sbicafe.ufv.br/handle/123456789/12510 |
Volume | 14 |
Issue | 3 |
Pages | 308-314 |
Publication | Coffee Science |
Date | 2019 |
Extra | 00002 Publisher: Editora UFLA |
DOI | 10.25186/cs.v14i3 |
Library Catalog | Google Scholar |
Abstract | The total of three consecutive years of fruit production was evaluated in six coffee cultivars (Coffea arabica L.) propagated by seed and grafted onto Robusta (Coffea canephora var. Robusta). The plantations were established at 640 m, 920 m, and 1340 m altitude in the central region of the Veracruz State, Mexico. The coffea plants were established in soils naturally infested with nematodes. Grafted plants had higher production than those propagated by seed. Fruit production was higher at 640 m and 920 m than at 1340 m for the two types of propagation. The cultivars Colombia Brote Café and Colombia Brote Verde had the highest fruit yield regardless of the propagation methods; in contrast, Pacamara, had the lowest. The grafted coffee plants that were planted at 1340 m had a yield reduction of 27% in comparison with those at 640 and 920 m. When the Costa Rica 95 variety was grafted, it achieved fruit yield similar to Colombia Brote Verde and Colombia Brote Café. Pacamara produced almost 28% more fruit when it was grafted onto Robusta. |
Date Added | 10/10/2021, 10:48:56 PM |
Modified | 10/20/2021, 7:04:41 PM |
Extracted Annotations (10/14/2021, 3:42:43 PM)
"the world and severely reduce fruit production. reased significantly due to nematode infestations in cropland (MARBÁN-MENDOZA, 2009; LÓPEZ-LIMA et al., 2015)." (p. 308)
"nematicides to the soil (VILLAINy et al., 2000). g of the coffee tree has been carried out for more than 45 years (BERTRAND et al., 2001)." (p. 308)
"t been certified or registered.fea arabica L. grafted on C. canephora have greater growth and coffee bean production over time on land with nematode infestation (FAHL et al., 2001, PRAWOTO & YULIASMARA, 2013). However, when the soil is free of nematodes, there are apparently no advantages to its use." (p. 308)
"production were expected from rootstocks. uction over three years from six coffee cultivars propagated by seeds was compared to their production when grafted onto Robusta, in soils infested with nematodes in regions of different altitudes." (p. 309)
"The experimental material consisted of the Coffea arabica L. cultivars Colombia Brote Verde, Colombia Brote Café, Pacamara, Costa Rica 95, Garnica F5, and Aztec Gold obtained of seed germination as well as grafted onto Coffea canephora Pierre ex Froehner (Robusta coffee)." (p. 309)
"canephora Pierre ex Froehner (Robusta coffee).f Robusta plants growing in Zentla county at 1000 m altitude that seemed vigorous and without any disease or insect attack." (p. 309)
"September 1998 in lands infested with nematodes. plants were found to be infested with nematodes such as Meloidogyne spp., Criconemella spp., Helicotylenchus spp., Tylenchus spp., and Paratylenchus (BARRAGÁN, LÓPEZ & MARBAN-MENDOZA, 2000; MARBÁNMENDOZA., 2009)." (p. 309)
"e/tolerance (CASTRO-e CAICEDO et al., 2010). higher fruit production in the three different altitudes (Table 2); the difference was nearly 39%. In other studies, increases in production were 89% and 151%, depending on the coffee scion/rootstock combination (FAHL et al., 2001)." (p. 310)
"01). offee scion plants grafted onto Robusta showed an increase in the number of stems and an increase of 52% in total leaf area." (p. 310)
"r of stems and anr increase of 52% in total leaf area. s, grafted plants showed higher transpiration and higher stomatal conductance rates than non-grafted plants (FAHL et al., 2001)." (p. 310)
"ral region of Veracruz. characterized by larger d low yield, is recommended for planting in lowland areas since it had better yields at 640 m than at 940 m and 1340 m." (p. 313)
"ds at 640 m than at 940 m and 1340 m. where genotype x environment interaction has been quantified in the cumulative total of three consecutive years of coffee fruit production in Mexico." (p. 313)
Type | Journal Article |
---|---|
Author | E. Furlani Junior |
Author | C. E. M. Barbosa |
Author | M. Rotundo |
Author | F. da S. Tosta |
Author | D. C. Nogueira |
URL | https://ojs.unesp.br/index.php/rculturaagronomica/article/view/2101 |
Volume | 18 |
Issue | 4 |
Pages | 89–99 |
Publication | Cultura Agronômica |
Date | 2009 |
Extra | 00000 Publisher: Faculdade de Engenharia, UNESP |
Library Catalog | Google Scholar |
Abstract | In order to evaluate the ideal point of coffee seed harvest (Catuaí and Mundo Novo), to determine the maximum germination potential and the seedling development characteristics (total height of the plants, the number of pairs of branches, the stem diameter and skirt length), to determine the quality of coffee seedlings, an experiment was carried out in the agricultural year 1999/2000, in the experimental area of FE/UNESP - Ilha Solteira Campus, located in the municipality of Selvíria- MS. Cultivar Catuaí was, on average, significantly superior to Mundo Novo in increments in total plant height and in number of pairs of branches. The cultivar Catuaí showed itself on average significantly higher than Mundo Novo in increments in total plant height and number of pairs of branches. Catuaí began its maturation at 145 daf (days after flowering), while Mundo Novo began its maturation at 175 daf; and at 235 daf Catuaí presented 55.55% of its fruits in the coquinho stage, while Mundo novo presented 86.25%. |
Date Added | 10/10/2021, 10:48:56 PM |
Modified | 10/18/2021, 10:34:41 PM |
Type | Journal Article |
---|---|
Author | Roberto Bobadilla Landey |
Author | Alberto Cenci |
Author | Frédéric Georget |
Author | Benoît Bertrand |
Author | Gloria Camayo |
Author | Eveline Dechamp |
Author | Juan Carlos Herrera |
Author | Sylvain Santoni |
Author | Philippe Lashermes |
Author | June Simpson |
URL | https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0056372 |
Volume | 8 |
Issue | 2 |
Pages | e56372 |
Publication | PLOS one |
Date | 2013 |
Extra | 00068 Publisher: Public Library of Science San Francisco, USA |
DOI | 10.1371/journal.pone.0056372 |
Library Catalog | Google Scholar |
Abstract | Embryogenic suspensions that involve extensive cell division are risky in respect to genome and epigenome instability. Elevated frequencies of somaclonal variation in embryogenic suspension-derived plants were reported in many species, including coffee. This problem could be overcome by using culture conditions that allow moderate cell proliferation. In view of true-to-type large-scale propagation of C. arabica hybrids, suspension protocols based on low 2,4-D concentrations and short proliferation periods were developed. As mechanisms leading to somaclonal variation are often complex, the phenotypic, genetic and epigenetic changes were jointly assessed so as to accurately evaluate the conformity of suspension-derived plants. The effects of embryogenic suspensions and secondary embryogenesis, used as proliferation systems, on the genetic conformity of somatic embryogenesis-derived plants (emblings) were assessed in two hybrids. When applied over a 6 month period, both systems ensured very low somaclonal variation rates, as observed through massive phenotypic observations in field plots (0.74% from 200 000 plant). Molecular AFLP and MSAP analyses performed on 145 three year-old emblings showed that polymorphism between mother plants and emblings was extremely low, i.e. ranges of 0–0.003% and 0.07–0.18% respectively, with no significant difference between the proliferation systems for the two hybrids. No embling was found to cumulate more than three methylation polymorphisms. No relation was established between the variant phenotype (27 variants studied) and a particular MSAP pattern. Chromosome counting showed that 7 of the 11 variant emblings analyzed were characterized by the loss of 1–3 chromosomes. This work showed that both embryogenic suspensions and secondary embryogenesis are reliable for true-to-type propagation of elite material. Molecular analyses revealed that genetic and epigenetic alterations are particularly limited during coffee somatic embryogenesis. The main change in most of the rare phenotypic variants was aneuploidy, indicating that mitotic aberrations play a major role in somaclonal variation in coffee. |
Date Added | 10/10/2021, 10:48:56 PM |
Modified | 10/18/2021, 11:02:33 PM |
Type | Journal Article |
---|---|
Author | Rose Nduku Mayoli |
Author | Dorcas Khasungu Isutsa |
Author | Aggrey Bernard Nyende |
URL | http://repository.chuka.ac.ke/handle/chuka/632 |
Volume | 7 |
Issue | 11 |
Pages | 2807-2820 |
Publication | International Journal of Development and Sustainability |
ISSN | 2186-8662 |
Date | 2018 |
Extra | 00000 Publisher: ISDS LLC, Japan |
Library Catalog | Google Scholar |
Abstract | This experiment evaluated the response of 11 selected recalcitrant coffee ‘Ruiru 11’ sibs to plantlet regeneration through direct somatic embryogenesis. Third leaf pair explants from field-grown mother plants were harvested, sterilized and induced for up to 12 months in half-strength Murashige and Skoog basal salts medium supplemented with 1 ml/L thidiazuron, 0.2 g/L thiamine, 0.1 g/L nicotinic acid, 0.1 g/L pyridoxine, 20 g/L sucrose, 100 mg/L myo- inositol, 100 mg/L cysteine and 3 g/L gelrite. Embryos were sequentially transferred to media for shooting for 8 weeks, rooting for 6 weeks and weaning for 4 weeks. The explants were effectively sterilized using 30% sodium hypochlorite (3.85 v/v) for 20 minutes. The sibs showed significant (P<0.05) genotypic variation, with sibs 11, 41, 71 and 121 from ‘Catimor 86’and those from ‘Catimor 90, 128 and 134’ regenerating somatic embryos, whereas sibs 52 and 142 from ‘Catimor 88’ failing to do so. Sib 137 had the highest 63% embryogenic rate and 3.7 average embryos per explant. Sibs 71 and 137 embryos developed longest shoots, with 84% of sib 137 embryos developing shoots. Sibs 93 and 71 embryos developed longest roots, with 91% of sib 71 embryos developing roots. About 91% of sib 71 plantlets survived acclimatization. Sibs 137, 71 and 93 were classified as highly embryogenic, whereas sibs 52 and 142 were non-embryogenic. Sib 71 best responded to plantlet regeneration through direct somatic embryogenesis. Therefore, sib 71 plantlets should be used in future as stocks for mother plants for mass propagation of ‘Ruiru 11’. |
Date Added | 10/10/2021, 11:00:56 PM |
Modified | 10/20/2021, 7:08:51 PM |
Type | Thesis |
---|---|
Author | Lubabali Hudson Alumiro |
URL | http://ir.jkuat.ac.ke/handle/123456789/1821 |
Date | 2015 |
Extra | 00000 |
Library Catalog | Google Scholar |
Type | PhD Thesis |
University | Jomo Kenyatta University of Agriculture and Technology |
Abstract | Breeding programs in Kenya have produced disease tolerant Coffea arabica varieties such as Ruiru 11 and Batian. Subsequently demand has surpassed supply. Existing propagation methods do not provide enough planting materials, hence the need to develop alternative methods of coffee propagation. The objective of this study was to develop an efficient In vitro regeneration protocol for coffee varieties Batian, Ruiru 11 and SL28 commercially grown in Kenya. Sterilization was carried out using different concentrations of Jik® (3.85 v/v sodium hypochlorite) for varied exposure times. A single step sterilization procedure was established using 28% for 25minutes and is recommended for further work. The effects of various auxins and cytokinins on the different In vitro regeneration stages of coffee were evaluated. The results showed significant differences among the different cytokinin and auxin levels for regeneration of the evaluated varieties. The best cytokinin level for induction of somatic embryogenesis was found to be 13.3µM Benzyl amino purine giving the highest mean number of somatic embryos across all selected varieties. Germination of somatic embryos was achieved on hormone free (control) Murashige and Skoog media and there were no significant differences amongst the evaluated levels of Benzyl amino purine. 2.5 µM NAA was best in induction of a well-developed root system for all the evaluated varieties with a mean length of 1.71±0.09mm for SL28 variety. The findings of this research work open an otherwise inadequately explored area for maximizing In vitro plantlet production in coffee that needs to be fully exploited. |
# of Pages | 77 |
Date Added | 10/10/2021, 11:00:56 PM |
Modified | 10/20/2021, 6:22:09 PM |
Type | Journal Article |
---|---|
Author | Ali Mohammed |
Author | Wosene Gebreselassie |
Author | Tigist Nardos |
URL | https://scialert.net/fulltext/?doi=ijar.2013.34.41 |
Volume | 8 |
Pages | 34–41 |
Publication | Agricultural Research |
Date | 2006 |
Extra | 00008 |
DOI | 10.3923/ijar.2013.34.41 |
Library Catalog | Google Scholar |
Abstract | Coffee (Coffea arabica L.) is primarily propagated by seedlings and produced directly from seeds. Effective Microorganisms (EM) has been used for the purpose of improving the germination of different crops. This study was initiated to assess the effect of EM on emergence and subsequent growth of coffee seedlings in different potting mix as a media for growth. The study was conducted in Jimma, Ethiopia from November 2011 until June 2012. The experimental units were laid out in a 5x3 factorial arrangement with Randomized Complete Block Design with three replications. The EM seed treatment had five levels of soaking h (3.5, 4.5, 5.5, 6.5 h and soaking in pure water for 72 h) while the potting mixes had three proportions of Forest Soil (FS) and EM Compost (EMC): (100% FS, 75% FS: 25% EMC and 50% FS: 50% EMC). The highest (76.47%) emergence was recorded from forest soil and EM compost mixture of 75:25 and seeds soaked in pure water for 72 h. Forest soil combined with a 4.5 h soaking of coffee seeds in EM solution resulted in the largest seedling height, number of primary branches and total dry matter. According to this study, EM solution may not be preferred than soaking in water as far as hastening of emergency is concerned. However, the use of forest soil as a pot media and soaking coffee seeds in EM solution for 4.5 h results in a relatively vigor coffee seedlings for transplanting. |
Short Title | Effect of Effective Microorganisms (EM) Seed Treatment and Types of Potting Mix on the Emergence and Growth of Coffee (Coffea arabica L.) Seedlings http |
Date Added | 10/10/2021, 11:00:56 PM |
Modified | 10/20/2021, 6:37:50 PM |
Extracted Annotations (10/18/2021, 12:22:25 AM)
"Effective Microorganisms (EM) are microbial inoculants comprised mainly of lactic" (p. 35)
"acid bacteria, photosynthetic bacteria, yeasts and actinomycetes that are commonly found in soil." (p. 36)
"The study was conducted at Jimma University College of Agriculture and Veterinary Medicine, coffee nursery site from November 2011 until June 2012. Jimma is located at approximate geographic coordinates of latitude 07°42'N and longitude of 36°50'E at an altitude of 1710 m above sea level." (p. 37)
"The EM seed treatment had five levels of different soaking h (3.5, 4.5, 5.5, 6.5 h and control) while the potting mixes had three different proportions of Forest Soil (FS) and EM compost (EMC): (100% FS, 75% FS: 25% EMC and 50% FS: 50% EMC)." (p. 37)
"Forest soil was collected from the middle of the forest at Eladale farm of the College. It was air dried, manually crushed and passed through 2 mm sieve to remove clods, plant roots and other foreign materials (Yakob et al., 1998). The sieved soil was filled to black polythene bag of 12 cm wide and 25 cm length as per the treatments in proportion to the EM or soil." (p. 37)
"The EM compost was prepared in a pit from coffee husk, biomass of parthenium and chicken feces with additional 200 mL EM solution which was sprinkled on the compost material at the first pit filling and first turning." (p. 37)
"Red ripe cherries from coffee cultivar 74-40, which is resistant to Coffee Berry Disease (CBD), were picked and added to water to skim off the floaters that were suspected of poor seed germination and seedling growth. The cherries were then hand pulped and washed off their mucilage with repeated change of water. Then, the seeds were uniformly treated with wood ash to avoid sticking together, cracking of the parchment and to keep away flies during drying under shade. Seeds were then dried to amoisture content of 18-20% and stored under dry and cool condition until sowing time." (p. 38)
"Four seeds were sown per polythene bag. Thinning to one seedling in a bag was done 90 days after sowing when all normal viable seedlings were expected to emerge." (p. 38)
"From this study, it can be concluded that soaking coffee seeds in EM solution may not be preferred than soaking in pure water as far as hastening of emergency is concerned. However, better and consistent performance in agronomic parameters (seedling height, number of primary branch and total dry matter content) were evidenced in EM-treated seeds after emergence." (p. 40)
Type | Journal Article |
---|---|
Author | Paula de Souza Cabral Costa |
Author | Maria Laene Moreira de Carvalho |
URL | https://www.scielo.br/j/cagro/a/hVn47pHZg3HxT9QSKq7XBQD/?lang=pt |
Volume | 30 |
Issue | 1 |
Pages | 92–96 |
Publication | Ciência e Agrotecnologia |
Date | 2006 |
Extra | 00000 Publisher: SciELO Brasil |
DOI | 10.1590/S1413-70542006000100013 |
Library Catalog | Google Scholar |
Language | por |
Abstract | The conductivity test is used to measure the leaches from the seeds, which certaintily reflect the membrane system integrity. The test is rapid and it is of simple operation, but the methodology needs to be tested for each individual species in order to reach a better precision and accuracy. This work was conducted to determinate the partition point for the realization of electrical conductivity test in coffee seeds. Ten seed lots of Coffea arabica, cultivar Acaiá, without parchment, were used in this study. For the evaluation of the partition point, seeds were imbibed for 96 hours and submitted to the germination test, with the correlation between the conductivity values and those obtained in the germination test being evaluated. The partition point is 120,5µS.cm-1, considering 70% of germination. |
Date Added | 10/10/2021, 11:00:56 PM |
Modified | 10/18/2021, 10:43:59 PM |
Seeds that gave rise to normal seedlings have lower electrical conductivity values and little variability.
The dead seed class, by in turn, presented a high variability and values of very high electrical conductivity (Figure 2).
The high variability of the dead seed class is attributed to the presence of many seeds that, despite of dead, exhibited very high conductivity values. low and those seeds with conductivity values very high, as was to be expected.
The vast majority of dead seeds that exhibited conductivity values lows was infected by fungi, and a minority had only the deteriorated embryo.
The seeds were soaked for 96 hours, and the conductivity reading was performed by the SAD-9000-S Automatic Seed Analyzer, which provided the electrical conductivity values of each seed and the lot value in S/cm.
It should be remembered that the removal of the parchment must be done manually, as several authors warn that mechanical removal causes mechanical damage to the seed, and many times, damage that affected the embryo.
Seeds with low conductivities and that originated abnormal seedlings were also found, probably due to fungal infection.
Seeds that showed high conductivity they also gave rise to normal seedlings. this happened mainly in lots of the last harvest, that is, those with the highest physiological quality, and may have been attributed to the presence of mechanical damage to the seed, which did not affect the embryo.
The electrical conductivity test, by the applied logistic model, using a 70% marketing probability, as in the conventional tests, accepts that batches from the 2002 harvest which have up to 120.5 S/cm of conductivity, in the general, can be marketed.
Type | Journal Article |
---|---|
Author | Hervé Etienne |
Author | François Anthony |
Author | Stéphane Dussert |
Author | Diana Fernandez |
Author | Philippe Lashermes |
Author | Benoît Bertrand |
URL | https://link.springer.com/article/10.1079/IVP2001273 |
Volume | 38 |
Issue | 2 |
Pages | 129–138 |
Publication | In Vitro Cellular & Developmental Biology-Plant |
Date | 2002 |
Extra | 00091 Publisher: Springer |
DOI | 10.1079/IVP2001273 |
Library Catalog | Google Scholar |
Abstract | The important advances in coffee biotechnological techniques which have been made particularly during the last 10yr could benefit the coffee breeder in practice and open new perspectives for the development of new varieties. The molecular phylogeny of Coffea species has been established using DNA sequence data. The molecular markers have revealed an extremely reduced genetic diversity in Coffea arabica L. in comparison to C. canephora. However, wild accessions collected in the Ethiopian highlands appeared to constitute a valuable gene reservoir. A complete genetic linkage map of C. canephora was reported and additional ones are being constructed, particularly on C. arabica. The integration of Molecular Assisted Selection in coffee breeding promises to drastically increase the efficiency of breeding programs. Economically important genes of the caffeine biosynthetic pathway or genes encoding for seed storage proteins have been isolated. The high performance already achieved in the in vitro propagation process by somatic embryogenesis offers the possibility to mass propagate superior hybrids in different countries of both C. arabica (selected F1 hybrids) and C. canephora (rootstock variety). Pilot productions by somatic embryogenesis currently permit preparation for commercial application. Somaclonal variation was observed. The percentage of the off-types can vary between 3 and 10% depending on the genotype. Seed cryopreservation enables a routine use for long-term conservation of coffee genetic resources. Transgenic plants have been obtained for the C. arabica and C. canephora cultivated species through Agrobacterium-mediated transformation which constitutes the technique now currently used to transfer directly genes in coffee plants. |
Date Added | 10/10/2021, 11:00:56 PM |
Modified | 10/18/2021, 9:26:52 PM |
Type | Journal Article |
---|---|
Author | Natália Arruda Sanglard |
Author | Paulo Marcos Amaral-Silva |
Author | Mariana Cansian Sattler |
Author | Stéfanie Cristina de Oliveira |
Author | Letícia Miranda Cesário |
Author | Adésio Ferreira |
Author | Carlos Roberto Carvalho |
Author | Wellington Ronildo Clarindo |
URL | https://link.springer.com/article/10.1007/s11240-018-1511-9 |
Volume | 136 |
Issue | 2 |
Pages | 255–267 |
Publication | Plant Cell, Tissue and Organ Culture (PCTOC) |
Date | 2019 |
Extra | 00009 Publisher: Springer |
DOI | 10.1007/s11240-018-1511-9 |
Library Catalog | Google Scholar |
Abstract | Indirect somatic embryogenesis (ISE) is required for plant propagation and a prerequisite for applications that may provide new germplasms. Genetic, epigenetic and physiological features of the explant donor are barriers for ISE establishment, hindering its wide use. Despite the identification and/or expression analysis of genes during ISE, no approach to establish the karyotype aspects has been performed so far. So, this study aims to establish the ISE and compare the in vitro responses between diploid (Coffea canephora and Coffea eugenioides), allotriploid (“Híbrido de Timor”—HT) and true allotetraploid (Coffea arabica) Coffea in a taxonomic and evolutive scenario. Under the same in vitro conditions, the four Coffea differed from each other during ISE. Leaf explants of the true allopolyploids yielded the highest mean number of friable calli (FC) in relative short time and visually exhibiting more pronounced length. FC of the allotetraploid C. arabica presented the highest mean number of mature cotyledonary somatic embryos (MCSE), which were also recovered faster in this species. However, MCSE mean number in HT was the same or lower than diploid Coffea. Besides, intraspecific variation related to the ISE responses was observed in each Coffea, mainly the mean number of FC obtained from ex vitro and in vitro C. arabica and C. eugenioides explants. So, epigenetic and physiologic features may also have influenced the ISE responses. The findings provide the basis for performing other approaches considering the ploidy level, epigenetic and physiological backgrounds. Besides, the data also contributed for understanding about the consequences of polyploidy. |
Short Title | Indirect somatic embryogenesis in Coffea with different ploidy levels |
Date Added | 10/10/2021, 11:00:56 PM |
Modified | 10/18/2021, 10:44:48 PM |
Type | Conference Paper |
---|---|
Author | M. L. Guimaraes |
Author | M. C. Pimenta |
Author | J. Montezuma-de-Carvalho |
URL | https://www.actahort.org/books/212/212_47.htm |
Pages | 315–321 |
Date | 1985 |
Extra | 00006 |
DOI | 10.17660/ActaHortic.1987.212.47 |
Library Catalog | Google Scholar |
Abstract | Clonal propagation of Coffea arabica L. can be achieved by induced somatic embryogenesis in vitro cultures of mature leaf explants. The protocol for obtaining perfect embryos bearing a bipolarity (shoot and root poles) consisted of a primary culture on a "conditioning medium" followed by culture on an "induction medium" as described by Söndahl and Sharp (1977). Afterwards we have used, instead of a solid medium, liquid media for further growth of these embryos. Experiments were conducted in order to see the effects of various plant growth regulators: benzylaminopurine (BAP); gibberellic acid (GA3); indole acetic acid (IAA) and naphtalene acetic acid (NAA) on the morphology of the derived plantlets. It was found that GA3 gives a good development of the hypocotyl but reduces cotyledonary leaves; BAP at optimal concentration (1.5 mg/l) gives a drastic increase of the cotyledonary area; IAA and NAA promote root development. In the selected medium (1.5 mg/l BAP; 1.0 mg/l GA3 and 1.0 mg/l IAA) plantlets grown under illumination at 25°C mimic normal seedlings. Only plantlets that have a good development of the cotyledonary leaves survive when transferred directly from the liquid media into the soil. |
Proceedings Title | Symposium on In Vitro Problems Related to Mass Propagation of Horticultural Plants 212 |
Date Added | 10/10/2021, 11:00:56 PM |
Modified | 10/20/2021, 6:15:04 PM |
Type | Thesis |
---|---|
Author | Roberto Bobadilla Landey |
URL | https://tel.archives-ouvertes.fr/tel-01016417/ |
Date | 2013 |
Extra | 00005 |
Library Catalog | Google Scholar |
Type | PhD Thesis |
Language | en |
University | Université Montpellier II-Sciences et Techniques du Languedoc |
Abstract | Influence of micropropagation through somatic embryogenesis on somaclonal variation in coffee (Coffea arabica): assessment of variations at the phenotypical, cytological, genetic and epigenetic level Somaclonal variation (SV) is a major concern in all micropropagation systems. It is described as the phenotypic variation displayed in in vitro-derived regenerants and it is believed to be originated from a large array of genetic and epigenetic mechanisms. Highly productive Coffea arabica hybrids are clonally disseminated in Meso-American region through somatic embryogenesis (SE). The objective of the present work in coffee is to evaluate the trueness-to-type of SE and to understand the mechanisms involved in SV. We assessed the variations in the propagated plants at the phenotypic, cytogenetic, genetic (mutations/AFLP, genetic transposition/S-SAP) and epigenetic (methylation/MSAP) level by using two complementary approaches. First, with 2 hybrids we studied industrial culture conditions expected to be weakly mutagenic thanks to the combined use of short term proliferation period (6 months) and low auxin supply (0-1.4 µM 2,4-D). Two proliferation systems i.e. secondary embryogenesis and embryogenic suspensions were compared, the latter being more productive and economic. AFLP and MSAP molecular analyses on 145 somatic seedlings showed that genetic and epigenetic polymorphisms between mother plants and emblings were extremely low, i.e. ranges of 0–0.003% and 0.07–0.18% respectively, with no significant difference between the proliferation systems. For the two hybrids tested, massive phenotypic observations in nursery and field plots showed very low levels of SV (0.9% from 800,000 plants). Cytological analysis showed abnormal chromosome numbers (41-43, 45) in most of coffee somaclonal variants and normal numbers (44) in phenotypically normal plants. Stressful experimental conditions were also applied by using extended proliferation periods (4, 12 and 27 months) for three independent embryogenic lines established for the Caturra var. in presence of high growth regulator concentrations (4.5 μM 2,4-D, 17.8 μM 6-BA) to understand the mechanisms of culture ageing on SV. The proliferation time strongly affected the SV frequency among the 180 regenerated plants and in a highly similar way with the three embryogenic lines. No variant was found after 4 months proliferation although 30% and 94% phenotypic variants were observed in plants derived from 12 and 27 month-old cultures, respectively. Regardless the culture age and the embryogenic line, no polymorphisms were found in the 124 plants analyzed and very limited methylation changes with MSAP markers (0.049-0.087%). However, similarly to plants derived from industrial conditions, phenotypic variants systematically showed abnormal chromosome numbers and normal plants systematically showed normal numbers. This work showed that SE based on embryogenic suspensions is reliable for true-to-type propagation of selected C. arabica varieties. It also demonstrated the importance of culture age on SV and hence the non random nature of this phenomenon. The genetic and epigenetic alterations are particularly limited during SE. The main change in most of phenotypic variants was aneuploidy showing that mitotic aberrations play a major role in SV in coffee. |
Short Title | Influence of micropropagation through somatic embryogenesis on somaclonal variation in coffee (Coffea arabica) |
# of Pages | 187 |
Date Added | 10/10/2021, 11:00:56 PM |
Modified | 10/20/2021, 6:31:03 PM |
Type | Journal Article |
---|---|
Author | Paulo Cesar Hilst |
Author | Denise Cunha Fernandes dos Santos Dias |
Author | Eveline Mantovani Alvarenga |
Author | Bruna Luiza de Souza |
URL | https://www.scielo.br/j/rbs/a/ChhmdHZbrYq9FsZfQQfhJ7w/ |
Volume | 34 |
Issue | 2 |
Pages | 212–217 |
Publication | Revista Brasileira de Sementes |
Date | 2012 |
Extra | 00012 Publisher: SciELO Brasil |
DOI | 10.1590/S0101-31222012000200004 |
Library Catalog | Google Scholar |
Abstract | Coffee seeds have slow and irregular germination, losing fast their viability during storage, and the standard germination test of these seeds requires at least 30 days. Besides, the results may not reflect the actual physiological quality of these seeds. The objective of this work was to develop a fast and practical test for evaluating the viability of coffee seeds, which is based on the interpretation of different color hues of exudates from seeds. Coffee seeds of the cultivar Catuai 44 from six lots were submitted to germination, accelerated aging, and electrical conductivity tests. In the exudates color hue test, coffee seeds without the parchment and the silvery pellicle (four replications of 10 seeds each) were distributed on top of paper towels moistened and then maintained into a germinator, at 25 ºC for 24, 48, 72, 96, and 120 h. Three classes of color hues were established: colorless, light color hue, and dark color hue, assigning the values of 0, 1, and 3, for each class, respectively. The proposed exudates color hue test can be recommended for the fast assessment of viability for coffee seeds. The most promising results were obtained for seeds with 12% moisture content, after imbibition periods of 72, 96, and 120 h; and with 30% moisture content, after imbibition periods of 72 and 120 h. |
Date Added | 10/10/2021, 11:00:56 PM |
Modified | 10/20/2021, 6:20:30 PM |
Extracted Annotations (10/12/2021, 1:12:13 AM)
"Six different seed lots of coffee (Coffea arabica L.) seeds, cv. "Catuaí 44", were used for the experiment." (p. 214)
"four subsamples of 50 seeds each (without the parchment) were arranged on top of four sheets of paper towels moistened with sterile distilled H2O, in the proportion of 2.5 times the mass of the dry substrate." (p. 214)
"The paper towel sheets were then turned into rolls, which were maintained into a seed germinator at 30 ºC (Brasil, 2009)." (p. 214)
"eight subsamples of 50 seeds each were used. Each subsample was weighed on a 0.001 g precision scale and then placed into plastic cups containing 75 mL of distilled water which were afterwards maintained into a BOD incubator at 25 ºC for 24 h. The electrical conductivity was determined by a conductivimeter." (p. 214)
"Those seeds were immersed in distilled H2O, for approximately 10 min., for the careful removal of the silvery pellicle with the aid of tweezers for not damaging the seed. Immediately after that procedure, the seeds were arranged (with the flat side in contact with two sheets of paper towels moistened with sterile distilled H2O, in the proportion of 2.5 times the mass of the dry substrate) and placed on top of aluminum mesh screens coupled to a gerbox containing 40 mL of sterile distilled H2O at the bottom. The gerbox were then lidded and placed into a germinator at 25 ºC, for 24, 48, 72, 96, and 120 h." (p. 214)
"The moisture content of seeds from all the six lots of seeds varied from 11.8% to 12.3% (Table 1)." (p. 215)
"It has to be emphasized, however, that the information obtained with the electric conductivity test for coffee seeds have been conflicting." (p. 215)
"By analyzing the data obtained in the test of color hues of exudates it is noticeable that for all imbibition periods evaluated it is possible to sort the seed lots into different levels of physiological quality (Table 2)." (p. 215)
"There is actually a negative correlation between the color hues of exudates from coffee seeds and their physiological quality; and the test of exudates color hues is promising for a fast evaluation of the viability of these seeds;" (p. 216)
"2ration of the seed lots into levels of quality, however, there is still the need of further adjustments on the evaluation criteria." (p. 217)
Type | Journal Article |
---|---|
Author | H. Goldbach |
Author | H. A. Vizcarra |
URL | http://biblioteca.catie.ac.cr/cgi-bin/koha/opac-detail.pl?biblionumber=82798 |
Volume | 30 |
Issue | 2 |
Pages | 223–226 |
Publication | Turrialba |
ISSN | 0041-4360 |
Date | 1980 |
Extra | 00001 |
Library Catalog | Google Scholar |
Language | en |
Abstract | In coffee seeds there is a correlation between the germination test and the results of the tetrazolium test (TTZ), if the lots have high viability. In the range of about 30 to 70 percent germination, TTZ test results generally give higher values. The TTZ test of embryos extracted from seeds is clearer than if it is done on cut seeds, since in the first case the coloration is more uniform and the results are more reliable. In cut seeds there is a tendency for no color to develop on the cut surface of the embryo. Coloring is complete after 3-4 hours in a 1 percent TTZ solution. Robusta coffee embryos are more susceptible to mechanical damage than Arabica coffee. Techniques for its correct preparation are given. |
Date Added | 10/10/2021, 11:30:40 PM |
Modified | 10/20/2021, 6:02:22 PM |
Type | Journal Article |
---|---|
Author | P. Ciridhar |
Author | E. P. Indu |
Author | G. A. Ravishankar |
Author | A. Chandrasekar |
URL | https://link.springer.com/article/10.1079/IVP2003519 |
Volume | 40 |
Issue | 2 |
Pages | 200–203 |
Publication | In Vitro Cellular & Developmental Biology-Plant |
Date | 2004 |
Extra | 00054 Publisher: Springer |
DOI | 10.1079/IVP2003519 |
Library Catalog | Google Scholar |
Abstract | A highly reproducible method for regeneration of Coffea arabica and C. canephora plants via direct somatic embryogenesis from cultured leaf and stem segments of regenerated plants was developed. Embryogenesis was influenced by the presence of triacontanol (TRIA) in the medium. TRIA incorporated at 4.55 and 11.38 μM in half-strength MS basal medium containing 1.1 μM 6-benzyladenine (BA) and 2.28 μM indole-3-acetic acid (IAA) induced direct somatic embryogenesis in both species. A maximum of 260±31.8 and 59.2±12.8 somatic embryos per culture were induced from in vitro leaf explants of C. arabica and C. canephora, respectively. TRIA also induced embryo formation from in vitro stem segment callus tissues along with multiplication of primary embryos into secondary embryos. By using TRIA, it was possible to obtain somatic embryogenesis in C. arabica and C. canephora. |
Date Added | 10/10/2021, 11:30:40 PM |
Modified | 10/20/2021, 12:25:20 AM |
Type | Journal Article |
---|---|
Author | Vinod Kumar |
Author | P. Giridhar |
Author | A. Chandrashekar |
Author | G. A. Ravishankar |
URL | https://link.springer.com/article/10.1007/s11738-007-0110-x |
Volume | 30 |
Issue | 2 |
Pages | 217–223 |
Publication | Acta Physiologiae Plantarum |
Date | 2008 |
Extra | 00042 Publisher: Springer |
DOI | 10.1007/s11738-007-0110-x |
Library Catalog | Google Scholar |
Abstract | The influence of polyamines, polyamine inhibitors and ethylene inhibitors were tested in Coffea canephora for in vitro morphogenetic response and caffeine biosynthesis. Coffea canephora produced non-embryogenic and embryogenic calli. Somatic embryos were produced only from the embryogenic callus. Endogenous polyamine pools were estimated in these tissues. Somatic embryos were subjected to secondary embryogenesis under the influence of putrescine, silver nitrate and specific inhibitors of polyamine biosynthesis. Estimation of endogenous total polyamines revealed that embryogenic callus contained 11-fold more spermine and 3.3-fold higher spermidine when compared to non-embryogenic callus. Incorporation of polyamines resulted in 58% explant response for embryogenesis when compared to control with 42% response. Incorporation of silver nitrate resulted in 65% response for embryogenesis. Incorporation of polyamine biosynthetic pathway inhibitors DFMO and DFMA resulted in 83% reduction in embryogenic response with concomitant increase in caffeine levels by two-fold as compared to control. These results have clearly demonstrated that polyamines play a crucial role in embryogenesis and caffeine biosynthesis. |
Date Added | 10/10/2021, 11:30:40 PM |
Modified | 10/20/2021, 6:22:59 PM |
Type | Journal Article |
---|---|
Author | Hervé Etienne |
Author | Benoît Bertrand |
URL | https://academic.oup.com/treephys/article/23/6/419/1679963 |
Volume | 23 |
Issue | 6 |
Pages | 419–426 |
Publication | Tree Physiology |
Date | 2003 |
Extra | 00125 Publisher: Heron Publishing |
DOI | 10.1093/treephys/23.6.419 |
Library Catalog | Google Scholar |
Abstract | We determined how age of embryogenic cell suspensions affects somaclonal variation in five F1 hybrids of Coffea arabica L. Batches of plants were produced either directly from embryogenic callus, or after 3, 6, 9 and 12 months of embryogenic cell suspension culture. Seven phenotypic variants were characterized. Based on vigor and productivity of the regenerated plants, we classified the variants in order of increasing severity of physiological disorders as: Juvenile leaf color, Giant, Dwarf, Thick leaf (Bullata), Variegata, Angustifolia, and Multi-stem. The Dwarf, Angustifolia and Multi-stem variants were the most frequent among the regenerated plants (1.4, 4.8 and 2.9%, respectively). The frequency (f) of variants increased exponentially with the age (t) of the embryogenic suspension, in accordance with the function f = 0.99e0.267t. For all genotypes, somaclonal variation was low (1.3%) in plants produced from embryogenic callus or 3-month-old cell suspensions and increased in frequency with increasing suspension age (6, 10 and 25% in plants produced from cell suspensions aged 6, 9 and 12 months, respectively). Large differences in somaclonal variation among genotypes were found only in plants produced from 12-month-old cell suspensions. For two genotypes, the oldest suspensions produced a majority of somaclonal variants (80–90%), whereas somaclonal variation ranged between 8 and 18% in the other genotypes. Cell suspension age and genotype also affected the type of variant produced. The severity of somaclonal variations increased with cell suspension age. For all genotypes combined, the Angustifolia variant was the most common. The other somaclonal variations were specific to certain genotypes or distributed randomly among the genotypes. |
Short Title | Somaclonal variation in Coffea arabica |
Date Added | 10/10/2021, 11:30:40 PM |
Modified | 10/20/2021, 5:38:59 PM |
Type | Journal Article |
---|---|
Author | Andi Ilham Latunra Yoas |
Author | Eva Johannes |
URL | http://www.savap.org.pk/journals/ARInt./Vol.12(1)/ARInt.2021(12.1-07).pdf |
Volume | 12 |
Issue | 1 |
Pages | 78-83 |
Publication | Academic Research International |
ISSN | 2223-9553 |
Date | March 2021 |
Extra | 00000 |
Library Catalog | Google Scholar |
Abstract | In general, coffee propagation still uses seeds, cuttings, grafting and shoot grafting. However, this method of propagation still has limitations in the amount of planting material. With somatic embryogenesis, it is possible to produce relatively uniform seedlings on a large scale and in a relatively short time. This study analyzed the effect of providing 2,4-dichlorophenoxyacetic acid (2,4 D) and 6-furfuryl- aminopurine (kinetin) in the process of forming embryogenic callus and somatic embryos from var.lini-s 795 arabica coffee leaves. This research was conducted at the Tissue Culture Laboratory, Department of Biology, Faculty of Mathematics and Natural Sciences, Hasanuddin University. The plant materiala used were var.lini-s 795 arabica coffee leaves. This study used 9 treatments and 1 control and used a completely randomized design with 3 replications. The parameters observed were the speed of the explants forming callus, the percentage of embryogenic callus, callus color, callus texture, callus wet weight, and the total of globules. The observation showed that all treatments were successful in forming callus except the control treatment. T he fastest treatment to produce callus was 2 ppm 2.4D and 2 ppm kinetin. The highest wet weight of callus was obtained in the treatment of 2.4 D 0.5 ppm and kinetin 0.5 ppm with a weight of 1.46 grams, the most embryogenic callus was obtained in treatment of 0.5 ppm 2.4 D and kinetin 0.5 ppm with a percentage 98% and the most somatic embryos in the form of golbular were obtained in the treatment of 0.5 ppm 2.4D and 2 ppm kinetin, which was 68.33. |
Date Added | 10/10/2021, 11:30:40 PM |
Modified | 10/20/2021, 7:26:10 PM |
Extracted Annotations (10/11/2021, 2:09:00 PM)
"Embryogenic callus was successfully induced from arabica coffee leaf explants in all treatments except the control treatment." (p. 82)
"The most embryogenic callus was produced in the treatment of 0.5 ppm 2.4 D + 0.5 ppm kinetin with a percentage of 98% and the least in the treatment of 1 ppm 2.4 D and 2 ppm kinetin resulted in embryogenic callus that was 80% and embryogenic callus" (p. 82)
"In subcultures, the most somatic embryos were produced in the treatment of 0.5 ppm 2.4 D and 2 ppm kinetin, namely 68.33 and the least in the treatment of 1 ppm 2.4 D and 0.5 ppm kinetin, namely 25." (p. 82)
Type | Thesis |
---|---|
Author | Shaheen Mahari Nst |
URL | https://repositori.usu.ac.id/handle/123456789/29676 |
Place | Medan |
Date | 2020 |
Extra | 00000 Publisher: Universitas Sumatera Utara |
Library Catalog | Google Scholar |
Language | indonesian |
University | Universitas Sumatera Utara |
Abstract | The problem that often faced in generative propagation is the slow germination of coffee seeds, which is thought to be caused by caffeine content. Efforts increase the germination coffee beans are the presence gibberellin and cytokinin soaking treatment prior to planting on seeds that have been shelled. This research was conducted at the screen house the Faculty of Agriculture, Universitas Sumatera Utara, Medan from October 2019 to January 2020 using a factorial randomized block design (RBD) with two treatment factors: factor one, giving growth regulators consisting without the provision of growth regulators, 20 ppm gibberellins, 100 ppm cytokinins and 20 ppm gibberellins + 100 ppm cytokinins and a factor two, Soaking duration consisting of soaking for 6 hours, 12 hours, 18 hours. The results showed that giving 20 ppm gibberellin significantly accelerated the opening cotyledons, when the cotyledons were broken, the germination rate and the vigor index the germination of arabica coffee. Soaking duration treatment had no significant effect on all parameters of seed germination. The interaction growth regulators and soaking duration did not significantly affect all parameters |
# of Pages | 61 |
Date Added | 10/10/2021, 11:30:40 PM |
Modified | 10/20/2021, 7:13:44 PM |
Type | Journal Article |
---|---|
Author | Yanelis Castilla-Valdes |
Author | Maria Esther Gonzalez-Vega |
Author | Llayma Espinosa-Torres |
URL | http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S0258-59362020000100004 |
Volume | 41 |
Issue | 1 |
Publication | Cultivos Tropicales |
ISSN | 1819-4087 |
Date | 2020 |
Extra | 00000 Publisher: Editorial Universitaria de la Republica de Cuba |
Library Catalog | Google Scholar |
Abstract | The importance of the conservation of plant genetic resources is becoming higher at times when the consequences of global climate change are more acute. The coffee genus (Coffea spp) is not exempt from these risks, so it is researched some alternatives for its ex situ conservation. Specifically, the in vitro conservation methods known as 'slow growth' allow the medium-term preservation of plant material, by decreasing the growth rate and the frequency between subcultures. Studies are needed on the independent effect of variations in the concentration of essential macro and microelements in the medium-term preservation of coffee. The objective of the work was to determine the effect of the decrease of the mineral content of the culture medium in the response of in vitro coffee plants (Coffea arabica L.) preserved by a period between two and six months. The plants, previously obtained in vitro, were cultured in modified MS medium, with three treatments consisting in the reduction to 75, 50 and 25 % of their macro and microelements. The survival, the number of leaf pairs, the leaf abscission and the percentage of rooted plants were evaluated at two, four and six months. In the treatment of 50 % MS, the survival percentages varied between 85 and 100 %, and were obtained intermediate values of leaf pairs and leaf abscission, with respect to the rest of the treatments. In addition, the plants developed roots that allowed them to survive despite the lack of nutrients. With this treatment, which represents a saving of the half of the mineral components of the culture medium, it is considered feasible to preserve the coffee plants for a period up to six months. |
Date Added | 10/10/2021, 11:30:40 PM |
Modified | 10/18/2021, 10:57:37 PM |
Type | Journal Article |
---|---|
Author | V. Ortiz-Timoteo |
Author | V. M. Ordaz-Chaparro |
Author | A. Aldrete |
Author | E. Escamilla-Prado |
Author | G. Sánchez-Viveros |
Author | R. M. López-Romero |
URL | https://core.ac.uk/download/pdf/249320115.pdf |
Volume | 11 |
Issue | 4 |
Pages | 68–73 |
Publication | Agroproductividad |
Date | 2018 |
Extra | 00000 Publisher: Colegio de Postgraduados |
Library Catalog | Google Scholar |
Language | por |
Abstract | Coffee seeds have slow and asynchronic germination, which increases the time needed to obtain seedlings, and the expenses associated. A pregerminative treatment (PT) was defined which decreases the germination time in seeds of Coffea arabica L. var. Colombia and Coffea canephora P. var. Robusta. Five pregerminative treatments in water were applied to seeds without endocarp: T1) immersion for 24 hours; T2) scraping plus immersion for 24 hours; T3) immersion for one hour at 40 °C; T4) immersion for 48 hours; and T5) scraping plus immersion for 48 hours. Subsequently, they were sown in two substrates (sand and peat-moss). The treatments had three replicates with 25 seeds as experimental unit, organized into a completely randomized design with factorial arrangement. The variables evaluated were: days to start of germination (DIG), speed of emergence (VE), and percentage of emergence (PE). In Coffea arabica, the PT that decreased the germination period was T1, obtaining seedlings at 22 days, with greater vigor with a VE of 0.55 emerged seedlings per day, and increased PE to 59, 92, and 97% on days 30, 40, and 50, respectively. In Coffea canephora, T1 presented 0.40 VE and PE of 42% at 30 days and 73% at 50 days, while T2 increased PE at 40 and 50 days by 70 and 81%, respectively. The best substrate was sand, which decreased the germination period of Coffea arabica and Coffea canephora to 26 and 23 days, increased VE to 0.53 and 0.35 emerged seedlings per day, respectively, and had PE of more than 70% after 50 days in both species. |
Date Added | 10/10/2021, 11:30:40 PM |
Modified | 10/20/2021, 4:26:02 PM |
Coffea seeds were evaluated arabica L. var. Colombia and C. canephora P. var. Robust at 30 harvest days.
T1) 24 hour immersion;
T2) sanding plus 24 hour immersion;
T3) immersion at 40 ° C for one hour;
T4) immersion 48 hours;
T5) sanding plus immersion 48 hours.Sanding is carried out on one side of the endosperm (water sandpaper No. 100).
The seeds were sown at a depth of 1 cm in river sand and peat in 1 L trays.
At 50 days the best combination was observed with T1 and sand (100% PE).
In C. canephora T2 and sowing in sand, it stood out as the best combination with 19 of DIG.
Between substrates, sand decreased and the germination period of seeds in Coffea arabica and Coffea canephora , by reducing the days of start of germination, increase speed and percentage of germination.
Very few replications in some trials. n=3
Type | Journal Article |
---|---|
Author | Jean-Christophe Breitler |
Author | Eveline Dechamp |
Author | Claudine Campa |
Author | Leonardo Augusto Zebral Rodrigues |
Author | Romain Guyot |
Author | Pierre Marraccini |
Author | Hervé Etienne |
URL | https://link.springer.com/article/10.1007/s11240-018-1429-2 |
Volume | 134 |
Issue | 3 |
Pages | 383–394 |
Publication | Plant Cell, Tissue and Organ Culture |
Date | 18 May 2018 |
Extra | 00044 Publisher: Springer |
Journal Abbr | PCTOC |
DOI | 10.1007/s11240-018-1429-2 |
Library Catalog | Google Scholar |
Abstract | Genome editing, which is an unprecedented technological breakthrough, has provided a valuable means of creating targeted mutations in plant genomes. In this study, we developed a genomic web tool to identify all gRNA target sequences in the coffee genome, along with potential off-targets. In all, 8,145,748 CRISPR guides were identified in the draft genome of Coffea canephora corresponding to 5,338,568 different sequences and, of these, 4,655,458 were single, and 514,591 were covering exons. The proof of concept was established by targeting the phytoene desaturase gene (CcPDS) using the Agrobacterium tumefaciens transformation technique and somatic embryogenesis as the plant regeneration method. An analysis of the RNA-guided genome-editing events showed that 22.8% of the regenerated plants were heterozygous mutants and 7.6% were homozygous mutants. Mutation efficiency at the target site was estimated to be 30.4%. We demonstrated that genome editing by the CRISPR/Cas9 method is an efficient and reliable way of knocking out genes of agronomic interest in the coffee tree, opening up the way for coffee molecular breeding. Our results also showed that the use of somatic embryogenesis, as the method for regenerating genome-edited plants, could restrict the choice of targeted genes to those that are not essential to the embryo development and germination steps. |
Date Added | 10/10/2021, 11:30:40 PM |
Modified | 10/18/2021, 10:18:04 PM |
Type | Journal Article |
---|---|
Author | Vaddadi Sridevi |
Author | Parvatam Giridhar |
URL | https://link.springer.com/article/10.1007%2Fs13562-012-0186-2 |
Volume | 23 |
Issue | 1 |
Pages | 112–118 |
Publication | Journal of plant biochemistry and biotechnology |
Date | 2014 |
Extra | 00019 Publisher: Springer |
DOI | 10.1007%2Fs13562-012-0186-2 |
Library Catalog | Google Scholar |
Abstract | Direct differentiation of shoot buds in Coffea dewevrei was evident from the seedling shoots with collar region and also from collar region end of hypocotyl segments in presence of 40 μM AgNO3, 8.88 μM of BA and 2.85 μM of IAA. Apart from this, shoot end of hypocotyl explants mainly supported yellow friable callus or somatic embryos. Subsequent transfer to the same medium induced secondary somatic embryogenesis. The collar region of the hypocotyl explants not only showed direct organogenesis by producing 1–3 shoots per explant and also able to produce globular somatic embryos and embryogenic yellow friable callus. Similarly direct somatic embryogenesis along with yellow friable embryogenic callus formation on 1/2 strength MS medium comprising 1.47 μM IAA, 2.22 μM BA and 40 μM AgNO3 was noticed from cut portion of in vitro leaf and stalk of regenerated plants. The microshoots rooted well upon subculturing onto the same medium in 6 weeks and showed 60 % survival in green house and resumed growth upon hardening. |
Date Added | 10/10/2021, 11:38:08 PM |
Modified | 10/18/2021, 10:45:39 PM |
Type | Journal Article |
---|---|
Author | Raúl Barbón |
Author | Elio Jiménez |
Author | Walter Preil |
URL | https://link.springer.com/article/10.1007/s11240-008-9427-4 |
Volume | 95 |
Issue | 2 |
Pages | 155–161 |
Publication | Plant cell, tissue and organ culture |
Date | 2008 |
Extra | 00020 Publisher: Springer |
DOI | 10.1007/s11240-008-9427-4 |
Library Catalog | Google Scholar |
Abstract | The influence of environment in the culture vessel is a factor that has very little study in the process of somatic embryogenesis. The present research was carried out with the objective to determine the effects of carbon dioxide on somatic embryogenesis of Coffea arabica cv. Caturra rojo. Embryogenic cell suspensions were cultured under different carbon dioxide concentrations (2.5%, 5.0%, and 10.0%) in the gases mixture and two control treatments, one with passive exchange and the other with forced ventilation. The results demonstrated that there were a larger number of somatic embryos formed with a concentration of 2.5% CO2. The differentiation of these somatic embryos of coffee in embryogenic cell suspensions (130 × 103 SE l−1) was also stimulated. The effects of CO2 on somatic embryogenesis were demonstrated when the control with passive exchange was compared with forced ventilation control, because in the former, where there was an accumulation of CO2, the production of somatic embryos was greater. CO2 could stimulate the formation and differentiation of somatic embryos directly, which led to a modification of the pH patterns of the culture medium or indirectly when producing changes in the pH that favored the somatic embryogenesis process. |
Short Title | Influence of in vitro environment on somatic embryogenesis of Coffea arabica L. cv. Caturra rojo |
Date Added | 10/10/2021, 11:38:08 PM |
Modified | 10/20/2021, 12:23:00 AM |
Type | Journal Article |
---|---|
Author | Bychappa Muniswamy |
Author | Bharathi Kosaraju |
Author | Manoj Kumar Mishra |
Author | Raghuramulu Yenugula |
URL | https://www.degruyter.com/document/doi/10.1515/biol-2017-0001/html |
Volume | 12 |
Issue | 1 |
Pages | 1–11 |
Publication | Open Life Sciences |
Date | 2017 |
Extra | 00011 Publisher: De Gruyter Open |
DOI | 10.1515/biol-2017-0001/html |
Library Catalog | Google Scholar |
Abstract | This study was conducted to compare the growth and yield of one of the commercial hybrid coffee cultivars (Coffea congensis x Coffea canephora) of robusta coffee established from somatic embryogenesis as well as conventional seedlings. Results indicated no statistically significant differences in the growth pattern or the cumulative yield between the somatic embryogenesis derived plants and the seedlings. The genetic fidelity of somatic embryogenesis derived plants and the mother plant was tested using sequence related amplified polymorphism (SRAP) markers. A total of 24 SRAP primers were employed for DNA analysis which produced a total of 153 clear, distinct and reproducible amplicons of variable size. Out of 24 SRAP primers, 9 primers produced amplification patterns which are identical between the mother plants and plants derived from somatic embryogenesis. Cluster analysis revealed more than 95% genetic similarity between the somatic embryogenesis derived plants and the mother plants indicating a high degree of genetic fidelity. The present study clearly demonstrates the usefulness of SRAP markers in genetic fidelity analysis of coffee. |
Date Added | 10/10/2021, 11:38:08 PM |
Modified | 10/19/2021, 1:15:14 AM |
Type | Journal Article |
---|---|
Author | B. Muniswamy |
Author | H. L. Sreenath |
URL | http://orton.catie.ac.cr/cgi-bin/wxis.exe/?IsisScript=ORTON.xis&cantidad=1&expresion=QUINETINA |
Volume | 28 |
Issue | 1-2 |
Pages | 20–24 |
Publication | Journal of Coffee Research |
ISSN | 0374-8537 |
Date | 2000 |
Extra | 00000 |
Library Catalog | Google Scholar |
Abstract | The zygotic embryos of C. canephora (cv. S.274) were encapsulated in 2 percent sodium alginate with half strength MS salts containing 1 mg/litre of ABA (abscisic acid). These beads were preserved in dark under growth room condition. For comparing the viability of encapsulated embryos, seeds of the same mother plant were selected and packed in polythene bags and were stored under room temperature. To test the germination percentage and viability, preserved encapsulated embryos were cultured on half strengthMS medium supplemented with 0.1 mg/litre of BAP (benzyladenine) at monthly intervals. Simultaneously, the seeds of the same mother plant were sown in soil. The preserved encapsulated zygotic embryos showed good germination up to 12 months and developed into plantlets after the fourth subculture at 35-45 days intervals on half strength MS medium with 0.1 mg/litre of kinetin. However, seeds of the same parent showed good germination only up to 4 months beyond which the germination decreased. After 7 monthsof storage, seeds lost their viability and none of them could germinate. The importance of the present results is discussed. |
Date Added | 10/10/2021, 11:38:08 PM |
Modified | 10/20/2021, 6:46:05 PM |
Type | Journal Article |
---|---|
Author | Anna Bertrand-Desbrunais |
Author | Michel Noirot |
Author | André Charrier |
URL | https://link.springer.com/article/10.1007/BF00157599 |
Volume | 27 |
Issue | 3 |
Pages | 333–339 |
Publication | Plant Cell, Tissue and Organ Culture |
Date | 1991 |
Extra | 00027 Publisher: Springer |
DOI | 10.1007/BF00157599 |
Library Catalog | Google Scholar |
Abstract | We have studied the influence of low concentrations of 6-benzyladenine on growth limitation, in order to preserve coffee germplasm through a microcutting collection. Concentrations of 0 μM, 1.3 μM and 4.4 μM were compared in four species: Coffea congensis, C. canephora, C. liberica and C. racemosa. After six months, microcutting behaviour varied between the different treatments, and a species effect was observed. The slow growing species (C. liberica and C. congensis) needed 1.3 μM; the others coffee species (C. canephora and C. racemosa) exhibited moderate caulogenesis on 6-benzyladenine-free medium. Zero and low concentrations did not affect survival rates. In conclusion 1.3 μM seems most appropriate for conserving all four species. |
Date Added | 10/10/2021, 11:38:08 PM |
Modified | 10/19/2021, 11:40:19 PM |
Type | Book Section |
---|---|
Author | Víctor M. Loyola-Vargas |
Author | Johny R. Avilez-Montalvo |
Author | Randy N. Avilés-Montalvo |
Author | Ruth E. Márquez-López |
Author | Rosa M. Galaz-Ávalos |
Author | Erika Mellado-Mojica |
URL | https://link.springer.com/chapter/10.1007/978-3-319-33705-0_15 |
Publisher | Springer |
Pages | 241–266 |
Date | 2016 |
Extra | 00014 |
Library Catalog | Google Scholar |
Abstract | Coffee is a very important commodity in the world. It is a perennial plant and as a consequence its genetic improvement had been difficult. The biotechnology, in particular somatic embryogenesis (SE) has helped to the propagation of commercial coffee cultivars. Along almost 50 years, different research groups around the world have developed uncountable SE processes to produce an efficient, reproducible, and reliable SE process. Many of the factors that affect the embryogenic response have been studied. It has been demonstrated that the genetic modification of coffee is possible. This transformation can lead to the improvement of varieties with very attractive agronomic traits, such as low caffeine content, resistant to diseases and pests. |
Book Title | Somatic embryogenesis: fundamental aspects and applications |
Date Added | 10/10/2021, 11:38:08 PM |
Modified | 10/19/2021, 11:48:39 PM |
Type | Journal Article |
---|---|
Author | Ângela Tonietto |
Author | Juliana Hiromi Sato |
Author | João Batista Teixeira |
Author | Emanuel M. de Souza |
Author | Fabio O. Pedrosa |
Author | Octávio Luiz Franco |
Author | Angela Mehta |
URL | https://link.springer.com/article/10.1007/s11105-012-0425-7 |
Volume | 30 |
Issue | 6 |
Pages | 1393–1399 |
Publication | Plant Molecular Biology Reporter |
Date | 2012 |
Extra | 00028 Publisher: Springer |
DOI | 10.1007/s11105-012-0425-7 |
Library Catalog | Google Scholar |
Abstract | Differential protein profiles of three stages of somatic embryogenesis, including globular, torpedo, and cotyledonary somatic embryos, of Coffea arabica cv. Catuaí Vermelho were analyzed in an attempt to better understand somatic embryogenesis in coffee plants. Somatic embryos at these different stages of development were collected from in vitro-grown cultures, and then macerated in liquid nitrogen. Proteins were extracted with phenol and further quantified using the Bradford method. The bidimensional electrophoresis analysis revealed a wide range of proteins ranging between 10 and 160 kDa and of pH values ranging from 3 to 10. Several differentially expressed proteins were identified by mass spectrometry, and some were found to be specific to these different stages of somatic embryogenesis in coffee. The enolase and 11S storage globulin proteins, for example, could be used as molecular markers for somatic embryo development stages and for embryogenic and non-embryogenic genotype differentiation, respectively. |
Date Added | 10/10/2021, 11:38:08 PM |
Modified | 10/19/2021, 11:54:07 PM |
Type | Journal Article |
---|---|
Author | Dominique BARRY-ETIENNE |
Author | Benoit Bertrand |
Author | Nelly Vasquez |
Author | Hervé Etienne |
URL | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4233853/ |
Volume | 90 |
Issue | 1 |
Pages | 77–85 |
Publication | Annals of botany |
Date | 2002 |
Extra | 00069 Publisher: Oxford University Press |
DOI | 10.1093/aob/mcf149 |
Library Catalog | Google Scholar |
Abstract | Coffea arabica L. plantlets obtained ex vitro after sowing somatic embryos produced in a bioreactor in horticultural substrate were compared with those obtained in vitro from the same embryo population under conventional culturing conditions on semi‐solid media. The intensity and quality of aerial and root system development were compared. Shoot emergence was more efficient in vitro but rooting frequencies were low. In contrast, all ex vitro‐regenerated embryos rooted. The cotyledon area of mature embryos produced in a bioreactor positively affected plantlet development when regeneration was carried out ex vitro. Embryos with an intermediate cotyledon area (0·86 cm2) had the highest rates of plant conversion ex vitro (63 %), and also resulted in vigorous plantlets. Mortality was higher in nursery conditions, but better plant development was obtained. The quality of plantlets produced under ex vitro conditions was reflected in better growth of the aerial and root systems, and also by similar morphological, mineral and water status characteristics to seedlings. Unlike roots formed on semi‐solid media, those produced in soil were branched, fine (30–50 % had a diameter of less than 0·5 mm) and they bore root hairs. Leaves of plantlets regenerated ex vitro had a histological structure similar to that of seedling leaves, and a lower stomatal density (100 vs. 233 mm–2). Moreover, they were more turgid, as indicated by higher pressure potential (ψP) (0·91 vs. 0·30 MPa) and relative water content values (97 vs. 93 %). Furthermore, under in vitro conditions, leaves had larger stomata which were abnormally round and raised. Direct sowing of germinated somatic embryos resulted in the rapid production of vigorous plantlets under ex vitro conditions, whilst removing the need for problematical and costly conventional acclimatization procedures. |
Short Title | Comparison of Somatic Embryogenesis-derived Coffee (Coffea arabica L.) Plantlets Regenerated in vitro or ex vitro |
Date Added | 10/10/2021, 11:38:08 PM |
Modified | 10/18/2021, 10:05:57 PM |
Type | Conference Paper |
---|---|
Author | A. C. R. Fraiz |
Author | O. A. O. Tonetti |
Author | J. A. Cleiton |
Author | E. A. A. da Silva |
Author | M. T. S. Eira |
URL | https://www.asic-cafe.org/conference/22nd-international-conference-coffee-science/changes-physiological-quality-coffea |
Publisher | Association Scientifique Internationale du Café (ASIC) |
Pages | 911–914 |
Date | 2009 |
Extra | 00000 |
Library Catalog | Google Scholar |
Proceedings Title | 22nd International Conference on Coffee Science, ASIC 2008, Campinas, SP, Brazil, 14-19 September, 2008 |
Date Added | 10/10/2021, 11:52:17 PM |
Modified | 10/18/2021, 9:35:30 PM |
Type | Journal Article |
---|---|
Author | Avinash Kumar |
Author | P. S. Simmi |
Author | Parvatam Giridhar |
URL | https://link.springer.com/article/10.1007/s11240-018-1428-3 |
Volume | 134 |
Issue | 3 |
Pages | 369–382 |
Publication | Plant Cell, Tissue and Organ Culture (PCTOC) |
Date | 2018 |
Extra | 00001 Publisher: Springer |
DOI | 10.1007/s11240-018-1428-3 |
Library Catalog | Google Scholar |
Abstract | Direct somatic embryogenesis is favoured over indirect methods for the in vitro propagation of Coffea canephora, as the frequency of somaclonal variation is usually reduced. Ethylene action inhibitors improve the tissue culture response and thus silver nitrate (AgNO3) is used for direct somatic embryogenesis in coffee. It was observed that silver thiosulphate (STS) that is a more potent ethylene action inhibitor, induced a much robust response in C. canephora cotyledonary leaf explants with 7.49 ± 0.57 and 7.08 ± 0.12 embryos/explant at 60 and 80 µM AgNO3, respectively compared to 3.3 ± 0.18 embryos/explant at 40 µM AgNO3. Transient transformation indicated that STS improved the transformation potential of embryos by enhancing Agrobacterium tumefaciens adherence to surfaces. In vitro adherence assays demonstrated that the cell wall material from STS-derived embryos provide a better substratum for adherence of Agrobacterium. Furthermore, blocking this substratum with anti-mannan hybridoma supernatant negatively effects the adherence. The presence of galactose and mannose residues in the decomposed cellulose fraction of STS treated somatic embryos are indicative of de-branching and re-modelling of galactomannan in response to ethylene inhibition. Genes of mannan biosynthesis, degradation and de-branching enzyme were affected to different extents in embryos derived in AgNO3 and STS containing somatic embryogenesis medium. The results indicate that ethylene-mediated cell wall galactomannan remodelling is vital for improving the transgenic potential in coffee. |
Date Added | 10/10/2021, 11:52:17 PM |
Modified | 10/18/2021, 9:34:34 PM |
Type | Journal Article |
---|---|
Author | Bruno Florin |
Author | Michel Rigoreau |
Author | Jean-Paul Ducos |
Author | Ucu Sumirat |
Author | Surip Mawardi |
Author | Charles Lambot |
Author | Pierre Broun |
Author | Vincent Pétiard |
Author | Teguh Wahyudi |
Author | Dominique Crouzillat |
Volume | 29 |
Issue | 4 |
Pages | 343–357 |
Publication | Plant cell reports |
Date | 2010 |
Extra | 00018 Publisher: Springer |
DOI | 10.1007/s00299-010-0825-9 |
Library Catalog | Google Scholar |
Abstract | The purpose of the study was to evaluate the possible genetic effect on vegetative propagation of Coffea canephora. Diversity for somatic embryogenesis (SE) ability was observed not only among two groups of C. canephora Pierre (Congolese and Guinean), but also within these different genetic groups. The results therefore showed that, under given experimental conditions, SE ability is depending on genotype. Furthermore the detection of quantitative trait loci (QTLs) controlling the SE and cutting abilities of C. canephora was performed on a large number of clones including accessions from a core collection, three parental clones and their segregating progenies. On the one hand we detected eight QTLs determining SE. Six positive QTLs for SE ability, whatever the criteria used to quantify this ability, were localized on one single chromosome region of the consensus genetic map. Two negative QTLs for SE ability (frequency of micro calli without somatic embryo) were detected on another linkage group. Deep analysis of the six QTLs detected for SE ability came to the conclusion that they can be assimilated to one single QTL explaining 8.6–12.2% of the observed variation. On the other hand, two QTLs for average length of roots and length of the longest sprouts of cuttings were detected in two linkage groups. These QTLs detected for cutting ability are explaining 12–27% of the observed variation. These observations led to conclude that SE and cutting abilities of C. canephora Pierre appeared to be genetic dependent but through independent mechanisms. |
Date Added | 10/10/2021, 11:52:17 PM |
Modified | 10/19/2021, 11:43:35 PM |
Type | Journal Article |
---|---|
Author | Mohammad Ehsan Dulloo |
Author | Luigi Guarino |
Author | Florent Engelmann |
Author | Nigel Maxted |
Author | John H. Newbury |
Author | Frank Attere |
Author | Brian V. Ford-Lloyd |
URL | https://link.springer.com/article/10.1023/A:1008621028343 |
Volume | 45 |
Issue | 6 |
Pages | 565–579 |
Publication | Genetic Resources and Crop Evolution |
Date | 1998 |
Extra | 00061 Publisher: Springer |
DOI | 10.1023/A:1008621028343 |
Library Catalog | Google Scholar |
Abstract | No single conservation technique can adequately conserve the full range of genetic diversity of a target species or genepool. To optimize the efficiency of germplasm conservation, a range of conservation techniques needs to be applied simultaneously. In this paper we review the progress made in the application of both in situ and ex situ complementary conservation strategies and techniques to the conservation of the genus Coffea and identify areas where more research work is required. Traditionally, Coffea species have been conserved ex situ as living plants in field genebanks due to their intermediate seed storage behaviour. However, progress made in the field of biotechnology in recent years have made it possible to envisage the use of in vitro, slow growth and cryopreservation for medium- and long-term conservation of Coffea germplasm, respectively. In situ conservation is also an important option for long-term conservation, but there are no genetic reserves specifically set up for conserving Coffea. Protected areas and managed reserves offer the best opportunities for conserving Coffea. A case study for Mascarene Coffea in Mauritius is presented and a strategy for their conservation is discussed. |
Short Title | Complementary conservation strategies for the genus Coffea |
Date Added | 10/10/2021, 11:52:17 PM |
Modified | 10/18/2021, 10:06:56 PM |
Type | Journal Article |
---|---|
Author | F. Quiroz-Figueroa |
Author | C. Fuentes-Cerda |
Author | R. Rojas-Herrera |
Author | V. Loyola-Vargas |
URL | https://link.springer.com/article/10.1007%2Fs00299-002-0464-x |
Volume | 20 |
Issue | 12 |
Pages | 1141–1149 |
Publication | Plant Cell Reports |
Date | 2002 |
Extra | 00186 Publisher: Springer |
DOI | 10.1007/s00299-002-0464-x |
Library Catalog | Google Scholar |
Abstract | Histocytological analysis carried out on leaf explants of Coffea arabica undergoing somatic embryogenesis revealed that, using a culture method involving a single Gelrite-containing semisolid medium, the entire region surrounding the edge of the plant-derived leaf explants showed the differentiation of organized structures with little or no callusing. Histological examination of embryogenesis without callus formation (direct somatic embryogenesis) revealed that at approximately 1 week after the explant had been placed in culture, the development of the embryo began in the form of a small, isodiametric, densely cytoplasmic cell that underwent a series of organized divisions. In embryogenesis from callus (indirect somatic embryogenesis), however, the embryogenic cell was observed within the first week. Our histological observations indicate that both direct and indirect somatic embryos of coffee that form on explanted leaf segments and callus, respectively, have a unicellular origin. |
Date Added | 10/10/2021, 11:52:17 PM |
Modified | 10/18/2021, 11:00:30 PM |
Type | Conference Paper |
---|---|
Author | Hervé Etienne |
Author | William Solano |
Author | A. Pereira |
Author | Benoît Bertrand |
Author | Nelly Vasquez |
Author | Dominique Barry-Etienne |
URL | https://agritrop.cirad.fr/526175/ |
Publisher | Instituto del Café de Costa Rica, ICAFE |
Pages | 273–283 |
Date | 2000 |
Extra | 00000 |
Library Catalog | Google Scholar |
Abstract | The effect of germination conditions on the morphology of Coffea arabica L. somatic embryos mass-produced in a one-litre temporary immersion bioreactor (RITA7) was studied with emphasis on direct sowing in soil. Using germinated embryos, direct sowing resulted in a highly successful conversion of embryos into plants. Culture density above 1,600 embryos/11-bioreactor positively affected embryo morphology by causing higher embryonic axis elongation (+4-5mm). At this density, addition of a high sucrose concentration (234 mM), 2 weeks before sowing, promoted an increase in effective plant conversion in soil (78%) and a vigorous vegetative growth of the resulting plants. Using this somatic embryogenesis process, 50 000 selected F1 hybrids were recently difunded in America Central. (Résumé d'auteur) |
Proceedings Title | XIX Simposio Latinoamericano de caficultura. Memoria, San José, Costa Rica, 2-6 Octubre 2000. |
Short Title | A solution for the utilization of in vitro culture for mass-diffusion of Coffea arabica elite materials |
Date Added | 10/11/2021, 12:04:42 AM |
Modified | 10/18/2021, 8:08:09 PM |
Type | Journal Article |
---|---|
Author | Eliana Arias-Pérez |
Author | Carlos Alberto Lecona-Guzmán |
Author | Federico Antonio Gutiérrez-Miceli |
Author | Joaquín Adolfo Montes-Molina |
Author | Nancy Ruiz-Lau |
Volume | 90 |
Issue | 6 |
Pages | 1741 |
Publication | Phyton |
Date | 2021 |
Extra | 00000 Publisher: Tech Science Press |
DOI | 10.32604/phyton.2021.016004 |
Library Catalog | Google Scholar |
Abstract | The present study aimed to develop a protocol for somatic embryogenesis and encapsulation of coffee embryos (Coffea arabica L.), for the conservation of genotypes with characteristics of commercial interest. Somatic embryos were induced from leaf explants in Murashige and Skoog medium (MS) supplemented with 1 mg · L −1 of 2,4-dichlorophenoxiacetic acid (2,4-D) combined with 2 mg · L −1 of benzyladenine (BA). Somatic embryos (SE) at the globular stage were encapsulated in a sodium alginate matrix; two treatments were tested: MS + 5 mg · L −1 BA + 1 mg · L −1 NAA + 3% (w/v) alginate, and MS + 7 mg · L −1 BA + 5.7 mg · L −1 indoleacetic acid (IAA) + 3% (w/v) alginate. Alginate was complexed with 100 mM calcium chloride (CaCl 2 ). Viability of the encapsulated SE was determined by staining with 0.01% fluorescein diacetate (FDA) after 0, 15, 30, and 45 days of storage at 4°C. Embryo viability was 100% in both treatments. |
Date Added | 10/11/2021, 12:04:42 AM |
Modified | 10/11/2021, 2:37:04 PM |
Extracted Annotations (10/11/2021, 2:48:57 PM)
"The collection of leaves from the apical (AL) or middle (ML) parts of the mother plants, as explant source, was carried out in eight-month-old coffee plants (C. arabica) that showed phenotypic resistance to CLR in plots located in the town of Sajonia, municipality of La Concordia, Chiapas, Mexico (latitude of 15.834722'N, longitude of−92.940833'W and an altitude of 740 m above sea level)." (p. 1742)
"Mexico (latitude of 15.834722'N, longitude of−92.940833'W and an altitude of 740 m above sea level).imycin (5 g · L−1) solutions, or a Captan-Agrimycin mixture (5 g · L−1, each), as a previous disinfection step to reduce contamination of explants." (p. 1742)
"Once the leaves were collected from mother plants, they were disinfected with a modification of the protocol of [7], as follows: leaves were washed with liquid soap (trichloro® Axion, 10 min) and then placed in an antioxidant/fungicide solution (30 g · L−1 sucrose, 150 mg · L−1 citric acid, 100 mg · L−1 ascorbic acid, 2.5 g · L−1 Captan® and 1 g · L−1 Agrimycin®) to taken them to plant biotechnology laboratory of the Intituto Tencnologico de Tuxtla Gutiérrez, Chiapas (approximately 3-4 h)." (p. 1742)
"The collected leaves were disinfected with 30% commercial chlorine (10 min) and 70% ethanol (5 min)." (p. 1742)
"Leaf explants of approximately 1.5 cm2 were cut eliminating the midrib of the AL and ML leaves and then placed in semi-solid culture medium MS + 1 mg · L−1 2,4-D and 2 mg · L−1 of BA, 30 g · L−1 sucrose, [8] pH of 5.7 ± 1, with 2.5 g · L−1 phytagel and incubated at 26 ± 2°C in the dark." (p. 1742)
"After 45 days in darkness, the explants with developing calluses were moved to a photoperiod of 16/8 light/dark hours." (p. 1742)
"For encapsulation, embryos in the globular stage were isolated from embryogenic callus with 45 days of induction, under a stereoscope-microscope (Luxed 4D, LABOMED)." (p. 1743)
"The encapsulation process was carried out by suspending somatic embryos in a sodium alginate solution, consisting in 3% sodium alginate (Sigma, St. Louis, MO) in MS medium, with different PGR (Treatment 1: 5 mg · L−1 BA and 1 mg · L−1 IAA; Treatment 2: 7 mg · L−1 BA and 5.7 mg · L−1 IAA)." (p. 1743)
"eatment 1: 5 mg · L BA and 1 mg · L IAA;- embedded embryos were taken with a micropipette and added to a 100 mM CaCl2 solution, as a complexing agent [9]." (p. 1743)
"After 30 min of stirring, encapsulated embryos were decanted and rinsed with sterile distilled water." (p. 1743)
"For viability studies, encapsulated embryos (artificial seeds) were stored either in empty Petri dishes at 4.0 ± 1°C [10] or in vitro in the germination medium (MS with 3 mg · L−1 of GA3)." (p. 1743)
"Evaluating the effect of explant position in the culture medium, on callus formation, revealed that putting the adaxial side of the leaves in contact with the culture medium gave a better response (100% in both AL and ML) than putting the abaxial side (~17% in AL and 0% in ML)." (p. 1746)
"In the present work, a 100% of embryo viability was obtained after 45 days of storage at 4°C." (p. 1747)
"These results are consistent with results found in the present work, where embryos in the globular stage were encapsulated but no germination was observed, even when encapsulation did not affect their viability." (p. 1747)
"However, it is necessary to further evaluate if encapsulation of embryos at more advanced stages could improve their germination capacity." (p. 1747)
Type | Journal Article |
---|---|
Author | R. Cupull Santana |
Author | C. Sánchez Esmoris |
Author | M. Ferrer Viva |
Author | M. del C. Cupull Santana |
Author | C. Pérez Navarro |
URL | https://biblat.unam.mx/en/revista/centro-agricola/articulo/efecto-de-trichoderma-azotobacter-y-micorrizas-como-agentes-estimulantes-y-de-control-de-rhizoctonia-solani-en-la-produccion-de-posturas-de-cafeto-coffea-arabica-l |
Volume | 27 |
Issue | 4 |
Pages | 23–28 |
Publication | Centro Agrícola |
Date | 2000 |
Extra | 00000 Publisher: Universidad Central'Marta Abreu'de Las Villas |
Library Catalog | Google Scholar |
Abstract | Coffea arabica;proteccion de las plantas;enfermedades fungosas;RHIZOCTONIA SOLANI;Trichoderma;Azotobacter;GLOMUS MOSSEAE;MYCORRHIZAEThe experiment was developed in the Coffee Research Station, in Jibacoa, Villa Clara, to a height of 340 msnm, with the objective of determine the stimulation of Trichoderma and Azotobacter in the germination and in the control of Rhizoctonia solani and united with Glomus mosseae in the emission of cotyledon leaves and to obtain quality’s posture of Coffea arabica Lin. Also was used a design of blocks at hazard with there resorts, 15 plants were evaluated by treatment, height, the stems diameter, the pair of leaves and the foliar dry mass, were applied in varying analysis and a half were compared by means of multiple Duncans ranks. with the use of Trichoderma, Azotobacter and Glomus mosseae it obtains postures with high quality, it point up the best result when Trichoderma was used to control the Rhizoctonia solani and combined with Azotobacter to stimulate the germination and with Glomus mosseae in the emission of cotyledon. |
Date Added | 10/11/2021, 12:04:42 AM |
Modified | 10/20/2021, 12:34:15 AM |
Type | Journal Article |
---|---|
Author | Geovanny I. Nic-Can |
Author | Adolfo López-Torres |
Author | Felipe Barredo-Pool |
Author | Kazimierz Wrobel |
Author | Víctor M. Loyola-Vargas |
Author | Rafael Rojas-Herrera |
Author | Clelia De-la-Peña |
URL | https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0072160 |
Volume | 8 |
Issue | 8 |
Pages | e72160 |
Publication | PLoS One |
Date | 2013 |
Extra | 00000 Publisher: Public Library of Science San Francisco, USA |
DOI | 10.1371/journal.pone.0072160 |
Library Catalog | Google Scholar |
Abstract | Plant cells have the capacity to generate a new plant without egg fertilization by a process known as somatic embryogenesis (SE), in which differentiated somatic cells can form somatic embryos able to generate a functional plant. Although there have been advances in understanding the genetic basis of SE, the epigenetic mechanism that regulates this process is still unknown. Here, we show that the embryogenic development of Coffea canephora proceeds through a crosstalk between DNA methylation and histone modifications during the earliest embryogenic stages of SE. We found that low levels of DNA methylation, histone H3 lysine 9 dimethylation (H3K9me2) and H3K27me3 change according to embryo development. Moreover, the expression of LEAFY COTYLEDON1 (LEC1) and BABY BOOM1 (BBM1) are only observed after SE induction, whereas WUSCHEL-RELATED HOMEOBOX4 (WOX4) decreases its expression during embryo maturation. Using a pharmacological approach, it was found that 5-Azacytidine strongly inhibits the embryogenic response by decreasing both DNA methylation and gene expression of LEC1 and BBM1. Therefore, in order to know whether these genes were epigenetically regulated, we used Chromatin Immunoprecipitation (ChIP) assays. It was found that WOX4 is regulated by the repressive mark H3K9me2, while LEC1 and BBM1 are epigenetically regulated by H3K27me3. We conclude that epigenetic regulation plays an important role during somatic embryogenic development, and a molecular mechanism for SE is proposed. |
Short Title | New insights into somatic embryogenesis |
Date Added | 10/11/2021, 12:04:42 AM |
Modified | 10/20/2021, 4:27:51 PM |
Type | Journal Article |
---|---|
Author | R. Rojas-Herrera |
Author | F. Quiroz-Figueroa |
Author | M. Monforte-González |
Author | L. Sánchez-Teyer |
Author | V. M. Loyola-Vargas |
URL | https://link.springer.com/article/10.1385/MB:21:1:043 |
Volume | 21 |
Issue | 1 |
Pages | 43–50 |
Publication | Molecular biotechnology |
Date | 2002 |
Extra | 00000 Publisher: Springer |
DOI | 10.1385/MB:21:1:043 |
Library Catalog | Google Scholar |
Abstract | Molecular and biochemical studies of somatic embryogenesis may help to shed light on the mechanisms governing this phenomenon. In this article, a differential display analysis approach was employed to investigate the changes taking place during the induction of somatic embryogenesis in leaf explants and suspension cultures of coffee. Cloned fragments show homologies to several proteins reported in databases, but only one has previously been described as regulated during somatic embryogenesis. By a reverse dot blot modification, the expression pattern of such fragments was evaluated. |
Date Added | 10/11/2021, 12:04:42 AM |
Modified | 10/20/2021, 3:52:26 PM |
Type | Journal Article |
---|---|
Author | Hervé Etienne |
Author | Benoît Bertrand |
Author | Christophe Montagnon |
Author | Roberto Bodadilla Landey |
Author | Eveline Dechamp |
Author | Isabelle Jourdan |
Author | Edgardo Alpizar |
Author | Eduardo Malo |
Author | Frédéric Georget |
URL | https://revues.cirad.fr/index.php/cahiers-agricultures/article/view/30967 |
Date | 2012 |
Extra | 00000 |
DOI | 10.1684/agr.2012.0553 |
Library Catalog | Google Scholar |
Language | fr |
Abstract | Of all the possible micropropagation techniques, vegetative propagation by somatic embryogenesis is by far the most promising one for the rapid, large-scale dissemination of elite individuals. Yet, to date, examples of somatic embryogenesis processes applied at an industrial scale are very few and far between. There are many complications. They usually involve a major genotypic effect, particularly for obtaining embryogenic tissues, or are related to the quality of regenerated somatic embryos, the incidence of somaclonal variation and, more generally, a lack of reproducibility and efficiency at certain stages of the process, leading to production costs that are prohibitive. Research on coffee somatic embryogenesis began at the end of the 1970s at various institutes, including Cirad. Between 1995 and 2001, Cirad moved the technique forward from a research laboratory scale to a technique enabling industrial dissemination of extremely promising Coffea arabica F1 hybrids. Over that period, two technological innovations made technology transfer economically feasible : mass production of somatic embryos in temporary immersion bioreactors and the possibility of sowing them directly in the nursery. At the same time, reassuring data were obtained on the genetic conformity of regenerated plants (somaclonal variation frequency < 3%). In 2002, in partnership with the ECOM group, Cirad decided to transfer the somatic embryogenesis method on an industrial scale to Central America so that four Arabica hybrid clones, that were selected for agroforestry- based farming systems could be disseminated throughout that part of the word. This article describes the different stages and the difficulties we had to overcome in coffee tree before successful technology transfer could occur in 2010. It describes one of the first examples of somatic embryogenesis technology applied at a commercial scale. |
Short Title | Un exemple de transfert de technologie réussi dans le domaine de la micropropagation |
Date Added | 10/11/2021, 12:04:42 AM |
Modified | 10/20/2021, 5:38:05 PM |
Type | Conference Paper |
---|---|
Author | Lanna Reni Gustianty |
URL | http://www.jurnal.una.ac.id/index.php/seminter2019/article/view/577 |
Place | Kisaran North Sumatra |
Date | 2019 |
Extra | 00000 Issue: 1 |
Library Catalog | Google Scholar |
Conference Name | The Role of Science in Development in the Era of Industrial Revolusion 4.0 based on Local Wisdom |
Proceedings Title | Multi-Disciplinary International Conference University of Asahan |
Date Added | 10/11/2021, 12:04:42 AM |
Modified | 10/20/2021, 6:17:58 PM |
Type | Book Section |
---|---|
Author | Lashermes Philippe |
Author | Bertrand Benoít |
Author | Etienne Hervé |
URL | https://link.springer.com/chapter/10.1007/978-0-387-71201-7_14 |
Publisher | Springer |
Pages | 525–543 |
Date | 2009 |
Extra | 10.1007/978-0-387-71201-7_14 |
Library Catalog | Google Scholar |
Book Title | Breeding plantation tree crops: Tropical species |
Date Added | 10/11/2021, 12:04:42 AM |
Modified | 10/18/2021, 9:29:17 PM |
Type | Journal Article |
---|---|
Author | Guilherme Araújo Lacerda |
Author | Antonio Chalfun-Júnior |
Author | Luciano Vilela Paiva |
Author | Emanuelle Ferreira Melo |
Author | Anderson Castro Soares de Oliveira |
Author | Juliana Costa de Rezende |
URL | http://www.sbicafe.ufv.br/handle/123456789/5629 |
Volume | 3 |
Issue | 1 |
Publication | Coffee Science |
ISSN | 1984-3909 |
Date | 2008 |
Extra | Influência de reguladores de crescimento no desenvolvimento radicular de sementes de Coffea arabica L. 'Rubi' in vitro |
Library Catalog | Google Scholar |
Abstract | It was evaluated the effect of plant growth regulators in the root development in coffee seeds cv. Rubi (Coffea arabica L. Rubi ) grown in vitro. Coffee seeds from adult plants were established on medium MS/2 + sucrose (20 g L-1) + agar (6 g L-1). Four treatments were tested: T1 - control; T2 - BAP (6 mg L-1) + NAA (0,1 mg L-1); T3 - BAP (6 mg L-1); T4 - GA3 (5 mg L-1). The highest rooting response was observed on the control (MS/2 + agar + sucrose). This suggest that rooting can be achieved without the use of plant growth regulators. |
Date Added | 10/11/2021, 12:09:58 AM |
Modified | 10/20/2021, 6:25:58 PM |
Type | Conference Paper |
---|---|
Author | R. D. De Castro |
Author | W. T. Estanislau |
Author | LM de M. Carvalho |
Author | HWM al Hilhorst |
URL | https://www.asic-cafe.org/conference/20th-international-scientific-colloquium-coffee/functional-development-and-maturation |
Publisher | Association Scientifique Internationale du Café (ASIC) |
Pages | 619–635 |
Date | 2005 |
Extra | 00000 |
Library Catalog | Google Scholar |
Proceedings Title | ASIC 2004. 20th International Conference on Coffee Science, Bangalore, India, 11-15 October 2004 |
Date Added | 10/11/2021, 12:09:58 AM |
Modified | 10/19/2021, 1:14:01 AM |
Type | Book Section |
---|---|
Author | Julieta Andrea Silva de Almeida |
Editor | Dalyse Toledo Castanheira |
Place | Universidade Federal de Viçosa |
Publisher | IntechOpen |
ISBN | 978-1-83880-885-3 |
Date | 2020 |
Extra | 10.5772/intechopen.90853 |
Library Catalog | Google Scholar |
Abstract | Somatic embryogenesis contributes to coffee breeding programs. This is a process of asexual reproduction which is based on the concept of cellular totipotency. Each haploid or somatic cell of the plant tissue has the genetic information necessary to generate a complete and functional plant. The somatic embryogenesis can occur either indirectly or directly. Coffea arabica genotypes may respond to direct, indirect, or both. In this species, the indirect somatic embryogenesis is composed of two phases, the callogenesis and the embryogenesis, while the direct pathway occurs in a single phase, without the callogenesis. In Coffea, in general, the indirect pathway is induced by the auxin and cytokinin, and the direct pathway with cytokinin only. C. arabica genotypes usually respond easily to the indirect route with high production of somatic embryos. But these are inefficient by the direct route because they present low production of embryos and the process occurs for a long time. In this review, emphasis will be given to different events that are part of the somatic embryogenesis of C. arabica occurring indirectly and in the direct pathway as well as factors that may affect its control. |
Book Title | Coffee-Production and Research |
Date Added | 10/11/2021, 12:09:58 AM |
Modified | 10/15/2021, 6:03:10 PM |
Type | Journal Article |
---|---|
Author | Vinod Kumar |
Author | K. V. Satyanarayana |
Author | S. Sarala Itty |
Author | E. P. Indu |
Author | P. Giridhar |
Author | A. Chandrashekar |
Author | G. A. Ravishankar |
URL | https://link.springer.com/article/10.1007/s00299-005-0045-x |
Volume | 25 |
Issue | 3 |
Pages | 214–222 |
Publication | Plant Cell Reports |
Date | 2006 |
Extra | 00000 Publisher: Springer |
DOI | 10.1007/s00299-005-0045-x |
Library Catalog | Google Scholar |
Abstract | A system for genetic transformation of Coffea canephora by co-cultivation with Agrobacterium rhizogenes harbouring a binary vector has been developed. The objective of the present study was the genetic transformation and direct regeneration of transformants through secondary embryos bypassing an intervening hairy root stage. Transformants were obtained with a transformation efficiency up to 3% depending on the medium adjuvant used. A. rhizogenes strain A4 harbouring plasmid pCAMBIA 1301 with an intron uidA reporter and hygromycin phosphotransferase (hptII) marker gene was used for sonication-assisted transformation of Coffea canephora. The use of hygromycin in the secondary embryo induction medium allowed the selection of transgenic secondary embryos having Ri T-DNA along with the T-DNA from the pCAMBIA 1301 binary vector. In addition transgenic secondary embryos devoid of Ri-T-DNA but with stable integration of the T-DNA from the binary vector were obtained. The putative transformants were positive for the expression of the uidA gene. PCR and Southern blot analysis confirmed the independent, transgenic nature of the analysed plants and indicated single and multiple locus integrations. The study clearly demonstrates that A. rhizogenes can be used for delivering transgenes into tree species like Coffea using binary vectors with Agrobacterium tumefaciens T-DNA borders. |
Date Added | 10/11/2021, 12:09:58 AM |
Modified | 10/20/2021, 6:23:44 PM |
Type | Book Section |
---|---|
Author | A. Menéndez-Yuffá |
Author | E. G. De Garcia |
URL | https://link.springer.com/chapter/10.1007/978-3-662-10617-4_6 |
Publisher | Springer |
Pages | 95–119 |
Date | 1996 |
Extra | 10.1007/978-3-662-10617-4_6 |
Library Catalog | Google Scholar |
Abstract | Coffee is a beverage appreciated all over the world, and therefore it is an important product in the international market, and generates a high income in the economy of several countries. The coffee-producing zones are in tropical and subtropical regions; the major coffee producers are: Brazil, Colombia, Indonesia, the Ivory Coast, Ethiopia, Mexico, Guatemala, Costa Rica, India, El Salvador, Uganda, Ecuador, Honduras, and the Philippines (data from FAO for 1992, Table 1). |
Book Title | Trees IV |
Date Added | 10/11/2021, 12:09:58 AM |
Modified | 10/18/2021, 9:53:15 PM |
Type | Journal Article |
---|---|
Author | Priyono Priyono |
URL | https://ccrjournal.com/index.php/ccrj/article/view/126 |
Volume | 26 |
Issue | 2 |
Publication | Pelita Perkebunan (a Coffee and Cocoa Research Journal) |
Date | 2010 |
Extra | 00000 |
DOI | 10.22302/iccri.jur.pelitaperkebunan.v26i2.126 |
Library Catalog | Google Scholar |
Language | en |
Abstract | Somatic embryogenesis (SE) should be very effective for propagation of coffee species. Evaluation of indirect somatic embryogenesis (ISE) and direct somatic embryogenesis (DSE) are useful for describing cell proliferation pre- cedes embryogenesis. The research aimed to evaluate the ISE and DSE ability of Coffea canephora Pierre which performed on a great genetic diversity, was carried out at the Nestlé R&D Centre Tours France in cluding the accessions derived from a coffee core collection of Nestle and three clones of ICCRI. Three aspects, namely: SE process, SE diversity and SE stability were evaluated. The results showed that both DSE and ISE process were observed in present study. These results indicated that both SE processes in C. canephora appeared to be independent mechanism. Under given experimental conditions, SE ability depended on the genotype. Diversity for SE ability was observed not only among three genetic groups of C. canephora (Congolese, Guinean, and Conillon), but also within the genetic groups. Moreover, SE was reproducible and stable for ex- plants from cuttings of the given genotype. Interestingly, among three clones of ICCRI, namely BP409, BP961 and Q121 which were used as parents for con- trolled crosses, showed significant differences suggesting which were possible segregation within their progenies for ISE ability. |
Date Added | 10/11/2021, 12:09:58 AM |
Modified | 10/20/2021, 4:16:05 PM |
Type | Journal Article |
---|---|
Author | Fernández-Da Silva |
Author | Luis Hermoso-Gallardo |
Author | Andrea Menéndez-Yuffá |
URL | http://ve.scielo.org/scielo.php?script=sci_arttext&pid=S0378-18442005001100008 |
Volume | 30 |
Issue | 11 |
Pages | 694–698 |
Publication | Interciencia |
ISSN | 0378-1844 |
Date | 2005 |
Extra | 00000 Publisher: Asociación Interciencia |
Library Catalog | Google Scholar |
Abstract | The main purpose of this research was to characterize and optimize the development of secondary somatic embryos in coffee (Coffea arabica cv. Catimor). In addition, as the primary somatic embryos formation is the previous stage to the differentiation of secondary somatic embryos, three methods for its induction were compared: 1) solid media in two stages, first in a medium with 4.5µM of 2,4-dichlorophenoxiacetic acid (2,4-D) and 35µM of benzyladenin (BA) and then in a medium with 4.3µM naphtaleneacetic acid, 2) solid media with 4.4-53.3µM BA in one stage, and 3) suspension cultures. In the latter treatment the callus was formed in two stages of solid media, one containing 9.3µM of kinetin and 2.3µM of 2,4-D, and a second one with 22.2µM of BA, and a third liquid medium with 35µM of BA. All the treatments induced primary and secondary somatic embryogenesis. The highest yield of somatic embryos was obtained in suspension cultures. The secondary somatic embryos differentiated directly from epidermal and subepidermal cells of the hypocotilar zone of the primary somatic embryos. |
Date Added | 10/11/2021, 12:09:58 AM |
Modified | 10/20/2021, 3:40:02 PM |
Type | Journal Article |
---|---|
Author | Lucas Eduardo de Oliveira Aparecido |
Author | Glauco de Souza Rolim |
Author | Jose Reinaldo da Silva Cabral De |
Author | Cicero Teixeira Silva Costa |
Author | Paulo Sergio de Souza |
URL | https://link.springer.com/article/10.1007/s00484-019-01856-1 |
Volume | 64 |
Issue | 4 |
Pages | 671–688 |
Publication | International journal of biometeorology |
Date | 2020 |
Extra | 00000 Publisher: Springer |
DOI | 10.1007/s00484-019-01856-1 |
Library Catalog | Google Scholar |
Abstract | Disease and pest alert models are able to generate information for agrochemical applications only when needed, reducing costs and environmental impacts. With machine learning algorithms, it is possible to develop models to be used in disease and pest warning systems as a function of the weather in order to improve the efficiency of chemical control of pests of the coffee tree. Thus, we correlated the infection rates with the weather variables and also calibrated and tested machine learning algorithms to predict the incidence of coffee rust, cercospora, coffee miner, and coffee borer. We used weather and field data obtained from coffee plantations in production in the southern regions of the State of Minas Gerais (SOMG) and from the region of the Cerrado Mineiro; these crops did not receive phytosanitary treatments. The algorithms calibrated and tested for prediction were (a) Multiple linear regression (RLM); (b) K Neighbors Regressor (KNN); (c) Random Forest Regressor (RFT), and (d) Artificial Neural Networks (MLP). As dependent variables, we considered the monthly rates of coffee rust, cercospora, coffee miner, and coffee tree borer, and the weather elements were considered as independent (predictor) variables. Pearson correlation analyses were performed considering three different time periods, 1–10 d (from 1 to 10 days before the incidence evaluation), 11–20 d, and 21–30 d, and used to evaluate the unit correlations between the weather variables and infection rates of coffee diseases and pests. The models were calibrated in years of high and low yields, because the biannual variation of harvest yield of coffee beans influences the severity of the diseases. The models were compared by the Willmott’s ‘d’, RMSE (root mean square error), and coefficient of determination (R2) indices. The result of the more accurate algorithm was specialized for the SOMG and Cerrado Mineiro regions using the kriging method. The weather variables that showed significant correlations with coffee rust disease were maximum air temperature, number of days with relative humidity above 80%, and relative humidity. RFT was more accurate in the prediction of coffee rust, cercospora, coffee miner, and coffee borer using weather conditions. In the SOMG, RFT showed a greater accuracy in the predictions for the Cerrado Mineiro in years of high and low yields and for all diseases. In SOMG, the RMSE values ranged from 0.227 to 0.853 for high-yield and 0.147 and 0.827 for low-yield coffee in the coffee borer forecasting. |
Date Added | 10/11/2021, 12:09:58 AM |
Modified | 10/20/2021, 12:39:04 AM |
Type | Book Section |
---|---|
Author | Manoj K. Mishra |
Editor | Jameel M. Al-Khayri |
Editor | Shri Mohan Jain |
Editor | Dennis V. Johnson |
URL | https://doi.org/10.1007/978-3-030-23112-5 |
Volume | 4 |
Publisher | Springer |
Pages | 475–515 |
ISBN | 978-3-030-23111-8 |
Date | 2019 |
Extra | 00000 |
Library Catalog | Google Scholar |
Abstract | Coffee is an important agricultural export commodity in many Asian, African and Latin American countries. It provides a livelihood for more than 125 million people worldwide. The genus Coffea comprises more than 125 species of which only 2 species Coffea arabica (arabica coffee) and C. canephora (robusta coffee) are commercially cultivated for beverage production. Climate change pres- ents unprecedented challenges to sustainable coffee cultivation on a global scale. Besides, both arabica and robusta coffee are subjected to biotic and abiotic stress conditions that limit their production and productivity. Although conventional breeding approaches are followed to attenuate some of these problems, they were slow and time-consuming. Furthermore, arabica coffee has a narrow genetic base and needs to be addressed immediately by incorporating diverse germplasm with potential agronomic values, using focused breeding programs. In both arabica and robusta, the full potential of germplasm has not been exploited. Recent progress in the biotechnological field particularly on molecular markers and new generation sequencing platform hold great promise to discover new genes and accelerate coffee breeding programs. The progress achieved in coffee transgenic technology also has unparalleled opportunities to develop new cultivars with improved agronomic traits. Recent progress in gene editing techniques has a significant impact on the genetic improvement of coffee. This chapter provides current and innovative information about coffee’s origin and distribution, genetic resource diversity and conventional breeding strategies and application. Current advances in the field of tissue culture, genetic transformation, gene editing and molecular breeding are also discussed. |
Book Title | Advances in Plant Breeding Strategies: Nut and Beverage Crops |
Date Added | 10/11/2021, 12:19:30 AM |
Modified | 10/15/2021, 9:48:56 PM |
Extracted Annotations (10/15/2021, 11:27:53 PM)
"Among the coffee species discovered so far, Coffea arabica is the only self-fertile tetraploid (2n = 4 × = 44), whereas all other Coffea species are diploid (2n = 2 × = 22) and mostly self-sterile (Pearl et al. 2004)" (p. 476)
"Two different genetic bases of Arabica, Typica and Bourbon, spread from Yemen and formed the base of present-day commercial arabica coffee cultivars grown worldwide." (p. 476)
"Commercial arabica cultivars currently grown worldwide are derived from two genetic bases known as Typica and Bourbon." (p. 478)
"Several researchers indicate that the Typica genetic base is derived from a single plant cultivated in Amsterdam in the early eighteenth century whereas the Bourbon genetic base consists of trees introduced to La Réunion (then Bourbon Island) from Mocha, Yemen in 1715 and 1718 (Krishnan 2013)." (p. 478)
"The two subpopulations of wild coffee were originally introduced from Ethiopia to Yemen where it subsequently underwent successive reductions in genetic diversity." (p. 478)
"Due to the self-fertilization of Coffea arabica, extensive reduction in genetic diversity has taken place among commercial cultivars (Anthony et al. 2002). In contrast to C. arabica, huge genetic diversity exists among coffee species in terms of plant growth habits (Fig. 12.2) and fruit color (Fig. 12.3)." (p. 479)
"The current system of conserving coffee germplasm is not sustainable, secure, cost-effective or rational and therefore should be considered as a global resource that will ensure the sustainability of coffee production for future generations (Krishnan 2018)." (p. 479)
"At present, field gene banks comprising Coffea arabica germplasm accessions are mainly available in Ethiopia, Kenya, Tanzania, India, Brazil, Columbia and Costa Rica and, similarly, robusta germplasm collections are held by Cameroon, Ivory Coast, Madagascar and India. Likewise, a large collection of diploid species is also available in the gene banks of Madagascar, Ivory Coast and India." (p. 480)
"Coffee seeds are intermediate or recalcitrant in nature and therefore sensitive to both desiccation as well as storage. As a result of the difficulty to store coffee seed, even at low temperature, the main conservation strategy of coffee genetic diversity has been carried out ex situ by planting coffee trees directly in the field." (p. 481)
"The analysis of six isozyme patterns in different C. arabica accessions revealed the absence of polymorphism, contrasting with the high level of morphological variation, and suggesting that isozymes are not appropriate for the study of genetic diversity and for C. arabica accession identification (Berthou and Trouslot 1977)." (p. 483)
"In addition to isozymes, leaf flavonoid profiles and phenolic constituents of different arabica and robusta genotypes were studied by Mishra et al. (1993) and Saraswathi et al. (1991), which revealed that although biochemical markers can be helpful, they have limited discrimination abilities." (p. 483)
"The major objectives of arabica breeding, during the initial years, included increasing productivity and resistance to leaf rust and later on, during the 1990s, other objectives like improving quality, resistance to pests and drought were pursued." (p. 488)
"First of all, the long process of traditional breeding involving several different techniques, such as parental selection, hybridization and progeny evaluation require at least 30 years to develop a new cultivar. Furthermore, the long generation time of the coffee tree, the high cost of field trials, the lack of accuracy of the breeding process, the differences in ploidy level between Coffea arabica and other diploid species and their incompatibility, are major limitations associated with conventional breeding (Mishra and Slater 2012)." (p. 488)
"In addition to these, genetic resistance to important pest and disease such as coffee white stem borer (Xylotrechus quadripes), a devastating pest on C. arabica, as well as coffee berry disease (CBD) caused by the fungal plant pathogen Colletotrichum kahawae are not available in the C. arabica gene pool and therefore difficult to be incorporated into a breeding program. Similarly, the source of resistance to coffee berry borer caused by Hypothenamus hampei, drought and cold tolerance and herbicide resistance are not readily available in the coffee gene pool." (p. 488)
"This is because most of arabica genotypes are morphologically indistinguishable from each other. Uniformity of morphological traits in Coffea arabica could be attributed to the origin of the species, its narrow genetic base and its self-fertile nature." (p. 489)
"Somatic embryo induction and plantlet regeneration in coffee is timeconsuming and often takes more than a year." (p. 490)
"However, one of the major obstacles associated with the commercial production of somatic embryos is the poor conversion of somatic embryos to plantlets and very low percent of survival of plantlets in the nursery during acclimatization." (p. 491)
"The coffee plant has a single apical meristem with each leaf axil producing 4-5 orthotropic buds and two plagiotropic buds. The plagiotropic buds only start development from the 10 to 11th node." (p. 491)
"Each single segment can provide 7-9 microcuttings every 80 days." (p. 491)
"Micropropagation through somatic embryogenesis involving a prolonged callus phase is considered unreliable due to genomic changes of in vitro raised plantlets (Jain 2001; Rani et al. 2000)." (p. 491)
"Reported field performance of somatic embryo derived plants showed a normal response in terms of physiology and yield." (p. 492)
"Until today, most traditional arabica cultivars selected during the period 1940-1970 are still commercially cultivated and much of the world's coffee is derived from these cultivars. These cultivars including Kents, S.288, S.795 from India, Mundo Novo, Caturra and Catuai from Brazil and Blue Mountain from Jamaica, are still under commercial cultivation." (p. 496)
"Coffee leaf rust (CLR), popularly known as orange rust, is caused by the biotrophic fungus Hemileia vastatrix Berk. & Br." (p. 499)
"It has been estimated that at a severe incidence level, the yield is reduced 30-80% in the case of arabica coffee which accounts for a more than USD 2 billion losses per year." (p. 499)
"Coffee berry disease (CBD) is caused by the fungus Colletotrichum kahawae on developing berries of arabica coffee in Africa. The disease has direct impact on yield and quality of the coffee as it affects the harvestable crop." (p. 500)
"Arabica cultivars are susceptible to both root-knot (Meloidogyne spp.) and rootlesion (Pratylenchus spp.) nematodes." (p. 501)
"Although several insect pests are known to attack coffee, only two have considerable economic significance: coffee berry borer caused by Hypothenemous hampei and coffee white stem borer caused by Xylotrechus quadripes." (p. 501)
"It has been observed that a resistance source to coffee berry borer is not available in either primary or secondary gene pools of coffee and the best control strategy of this insect pest is achieved by IPM methods." (p. 501)
"White stem borer is the major pest on arabica coffee in India. The annual loss incurred due to WSB infestation is estimated atUSD17.5-26 million (Venkatesha 2010)." (p. 501)
"Arabica coffees are generally more tolerant to moisture stress as compared to robusta coffees because of a more extensive and deeper root system." (p. 501)
Type | Journal Article |
---|---|
Author | A. V. Fagundes |
Author | SDVF da Rosa |
Author | F. L. F. Ribeiro |
Issue | 11 |
Pages | 1–6 |
Publication | Revista Brasileira de Armazenamento |
Date | 2009 |
Extra | Aceleração da formação de mudas de Coffea arábica L., cultivar "Topázio" em função da retirada do pergaminho |
Library Catalog | Google Scholar |
Date Added | 10/11/2021, 12:19:30 AM |
Modified | 10/18/2021, 8:18:04 PM |
Type | Journal Article |
---|---|
Author | F. Ortuno V |
Author | R. Echandi Z |
Volume | 4 |
Issue | 2 |
Pages | 149–154 |
Publication | Agronomia Costarricense |
Date | 1980 |
Extra | 00000 |
Library Catalog | Google Scholar |
Date Added | 10/11/2021, 12:19:30 AM |
Modified | 10/20/2021, 4:22:23 PM |
Type | Journal Article |
---|---|
Author | Raúl Barbon |
Author | Hien Nguyen Thi |
Author | Alina Capote |
Author | Manuel de Feria |
Author | Elisa Quiala |
Author | Anabel Pérez |
URL | https://revista.ibp.co.cu/index.php/BV/article/view/53 |
Volume | 14 |
Issue | 2 |
Publication | Biotecnología Vegetal |
Date | 2014 |
Extra | 00000 |
Library Catalog | Google Scholar |
Abstract | The development of somatic embryogenesis of coffee tree (Coffea spp.) In liquid culture media is a viable alternative for the propagation of this species. The use of liquid culture media and temporary immersion systems could increase the germination of somatic embryos and improve the quality of the plants. To this end, the objective was to determine the effect of inoculation density on the germination of somatic embryos of Coffea arabica L. cv. 'Red Caturra' in Temporary Immersion Systems type RITA®. 40, 50, 60, 70 and 80 somatic embryos were used by RITA® as inoculum densities. At 90 days of culture, the number of germinated somatic embryos, hyperhydricity symptoms, number of true leaves, length and root development were quantified. With the inoculum density of 70 somatic embryos per RITA®, the highest germination percentage (60%) was achieved with good foliar development and the length of the plants obtained. |
Date Added | 10/11/2021, 12:19:30 AM |
Modified | 10/19/2021, 1:39:01 AM |
Type | Journal Article |
---|---|
Author | J. Pertel |
Author | D. Naveira |
Author | DCF dos S. Dias |
Author | LA dos S. Dias |
Author | E. E. de Lima e Borges |
Issue | Especial 11 |
Pages | 16–23 |
Publication | Revista Brasileira de Armazenamento |
Date | 2009 |
Extra | 00000 Publisher: Centro Nacional de Treinamento em Armazenagem, Universidade Federal de Viçosa |
Library Catalog | Google Scholar |
Date Added | 10/11/2021, 12:19:30 AM |
Modified | 10/11/2021, 12:19:33 AM |
Type | Journal Article |
---|---|
Author | Maria Cristina Simões-Costa |
Author | Isabel Reis Moura |
Author | Maria Teresa Barros |
Author | Carlos José Rodrigues Jr |
URL | https://revistas.rcaap.pt/rca/article/view/15883 |
Volume | 33 |
Issue | 2 |
Pages | 192–200 |
Publication | Revista de Ciências Agrárias |
Date | 2010 |
Extra | 00000 |
DOI | 10.19084/rca.15883 |
Library Catalog | Google Scholar |
Language | en |
Abstract | Somatic embryogenesis was induced in leaf explants of Coffea arabica ‘Catuai’. A two steps procedure was followed: explants were first cultured in a callus induction medium containing 2,4-dichlorophenoxyace-tic acid and 6-benzylaminopurine and later transferred to an auxin free embryo induc-tion and conversion medium. The influence of three mineral salt formulations: Schenk & Hildebrandt (1972) full salt solution, Mu-rashige & Skoog (1962) full and half salt solutions; two vitamin mixtures: Gamborg et al. (1968) and Schenk & Hildebrandt (1972) and two gelling agents: agar and gelrite, was assessed. Best embryogenic response was obtained in culture medium with Schenk & Hildebrandt (1972) mineral salts, Gamborg et al. (1968) vitamins and agar. In this medium, somatic embryos were observed after 18 weeks of culture and, six weeks later, 85% of the explants presented an average of 18 somatic embryos per explant. |
Date Added | 10/11/2021, 12:19:30 AM |
Modified | 10/20/2021, 12:25:39 PM |
Type | Journal Article |
---|---|
Author | Luc Villain |
Author | Jamel Aribi |
Author | Georges Réversat |
Author | François Anthony |
URL | https://link.springer.com/article/10.1007/s10658-010-9671-4 |
Volume | 128 |
Issue | 4 |
Pages | 451–458 |
Publication | European journal of plant pathology |
Date | 2010 |
Extra | 00000 Publisher: Springer |
DOI | 10.1007/s10658-010-9671-4 |
Library Catalog | Google Scholar |
Abstract | Root-knot nematodes (Meloidogyne spp.) threaten the livelihood of millions of farmers producing coffee worldwide. The use of resistant plants either as cultivars or rootstocks appears to be the single most effective method of control. A screening method was developed to evaluate large populations of plants for resistance to root-knot nematodes. Two coffee cultivars, one susceptible and the other resistant to Meloidogyne paranaensis, were grown under controlled conditions in two substrates: a commercial sieved potting compost and an inert substrate containing sand with a water-absorbent synthetic polymer. Plant growth and development and nematode multiplication were compared for two inoculation dates (2 and 8 weeks after planting) and two evaluation dates (eight and 13 weeks after inoculation). Root growth, but not nematode multiplication, was influenced by the choice of substrate. Evaluation of the differences in root weight and nematode numbers between the different cultivars, substrates and dates of inoculation suggested that an optimal condition could be defined. The best discrimination between susceptible and resistant plants was found in the experiment where inoculation occurred at 2 weeks after planting and evaluation occurred at 8 weeks after inoculation. Because the total duration of this experiment was only 3 months, high-throughput evaluation was possible, opening up new possibilities for screening large germplasm collections and studying the genetic control of root-knot nematode resistance in coffee. |
Date Added | 10/11/2021, 12:19:30 AM |
Modified | 10/18/2021, 8:02:57 PM |
Type | Journal Article |
---|---|
Author | Ruth E. Márquez-López |
Author | Cleyre Pérez-Hernández |
Author | Ángela Ku-González |
Author | Rosa María Galaz-Ávalos |
Author | Víctor Manuel Loyola-Vargas |
URL | https://link.springer.com/article/10.1007/s00709-017-1181-1 |
Volume | 255 |
Issue | 2 |
Pages | 695–708 |
Publication | Protoplasma |
Date | 2018 |
Extra | 00000 Publisher: Springer |
DOI | 10.1007/s00709-017-1181-1 |
Library Catalog | Google Scholar |
Abstract | Auxin and polar auxin transport have been implicated in controlling zygotic embryo development, but less is known about their role in the development of somatic embryos. The aim of this study was to determine if indole-3-acetic acid (IAA) and the PIN1 transporter participate in the induction of somatic embryogenesis (SE) and the development of somatic embryos. The results show that IAA levels gradually increase during pre-treatment and accumulate in the chloroplast. During pre-treatment and the globular stage of SE in C. canephora, auxin is distributed uniformly in all of the cells of the somatic embryo. During the subsequent stages of development, auxins are mobilized to the cells that will form the cotyledons and the root meristem. The location of the PIN transporters shifts from the plasmalemma of the protoderm cells during the globular stage to the plasmalemma of the cells that will give rise to the cotyledons and the vascular tissue in the late stages of somatic embryogenesis. The incubation of the explants in the presence of 2,3,5-triiodobenzoic acid (TIBA) produced aberrant somatic embryos, suggesting that PIN1 mediates the transport of IAA. |
Date Added | 10/11/2021, 12:19:30 AM |
Modified | 10/20/2021, 6:32:34 PM |
Type | Journal Article |
---|---|
Author | J. Pertel |
Author | DCF dos S. Dias |
Author | LA dos S. Dias |
Author | E. E. de Lima e Borges |
Author | D. Naveira |
Issue | Especial 10 |
Pages | 15–23 |
Publication | Revista Brasileira de Armazenamento |
Date | 2008 |
Extra | 00000 Publisher: Centro Nacional de Treinamento em Armazenagem, Universidade Federal de Viçosa |
Library Catalog | Google Scholar |
Date Added | 10/11/2021, 12:19:30 AM |
Modified | 10/11/2021, 12:19:36 AM |
Type | Journal Article |
---|---|
Author | Rose Nduku Mayoli |
Author | Dorcas Khasungu Isutsa |
Author | Aggrey Bernard Nyende |
URL | https://isdsnet.com/ijds-v8n9-11.pdf |
Volume | 8 |
Issue | 9 |
Pages | 645–656 |
Publication | International Journal of Development and Sustainability |
ISSN | 2186-8662 |
Date | 2019 |
Extra | 00000 |
Journal Abbr | Int. J. Dev. Sus |
Library Catalog | Google Scholar |
Abstract | Coffee is an important beverage crop owing to its economic benefits at individual and national levels. The most important part of coffee in vitro micropropagation is the generation of genetically homogenous and uniform plantlets with all desirable characters of the mother plant. Somaclonal variation may lead to generation of off-types planting material with undesirable character(s) due to loss of genetic fidelity. The present experiment investigated genetic stability and somaclonal variation of 54 somatic embryo-regenerated Coffea arabica ‘Ruiru 11’ sibs 93, 100, 121 and 137 and 2 clonal mother plants of each sib. The Sibs were characterized using 13 SSR molecular markers. The molecular data was organized into a matrix and genetic similarity calculated with Jaccard’s distances using XLSTAT statistical software and a profile plot constructed using Unweighted Pair Group Method with Arithmetic average cluster analysis to evaluate the genetic fidelity amongst the regenerated plantlets. All banding profiles from somatic embryogenesis regenerated plantlets were monomorphic and similar to those of the mother plants with a similarity value of 1. The profile plot revealed 100% similarity between the somatic embryo-regenerated plantlets and the clonal mother plants. These results confirmed that the somatic embryo-regenerated progenies were uniform according to the SSR markers. The somatic embryogenesis process had a mechanism for selecting competent cells and the regenerated plantlets were genetically stable. Therefore, the protocol for regenerating somatic embryos is recommended for use in mass propagation of the disease-resistant somaclones for distribution to farmers to use in expansion of the acreage planted with coffee. |
Date Added | 10/11/2021, 12:26:01 AM |
Modified | 10/18/2021, 8:05:38 PM |
Type | Journal Article |
---|---|
Author | Josue Ortega-Ortega |
Author | Francisco Arturo Ramírez-Ortega |
Author | Roberto Ruiz-Medrano |
Author | Beatriz Xoconostle-Cázares |
Volume | 54 |
Issue | 6 |
Pages | 998–1004 |
Publication | HortScience |
Date | 2019 |
Extra | 00000 Publisher: American Society for Horticultural Science |
DOI | 10.21273/HORTSCI13916-19 |
Library Catalog | Google Scholar |
Abstract | Coffee is an important crop worldwide, grown on about 10 million hectares in tropical regions including Latin America, Africa, and Asia. The genus Coffea includes more than 100 species; most are diploid, except for C. arabica, which is allotetraploid and autogamous. The genetic diversity of commercial coffee is low, likely due to it being self-pollinating, in addition, the widespread propagation of few selected cultivars, such as Caturra, Bourbon, and Typica. One approach is the analysis of genome size in these cultivars as a proxy to study its genetic variability. In the present work, genome size of 16 cultivars was assessed through high-resolution flow cytometry (FCM). Nuclear DNA was analyzed using a modified procedure that uses propidium iodide (PI) and 4′,6′-diamino-2-phenylindole dihydrochloride hydrate (DAPI) staining. The C. arabica cultivars investigated possessed a nuclear DNA content ranging from 2.56 ± 0.016 pg for Typica, to 3.16 ± 0.033 pg for ICATU, which had the largest genome size. All cultivars measured using both fluorochromes had greater estimates with DAPI than PI. The proportion of the genome composed of guanosine and cytosine (GC%) among the cultivars evaluated in this study ranged from 37.03% to 39.22%. There are few studies of genome size by FCM of distinct important C. arabica cultivars, e.g., hybrids and artificial crosses. Thus, this work could be valuable for coffee breeding programs. The data presented here are intended to expand the genomic understanding of C. arabica and could link nuclear DNA content with evolutionary relationships such as diversification, hybridization and polyploidy. |
Date Added | 10/11/2021, 12:26:01 AM |
Modified | 10/11/2021, 9:12:43 PM |
Type | Journal Article |
---|---|
Author | R. Sinício |
URL | http://www.bibliotekevirtual.org/index.php/2013-02-07-03-02-35/2013-02-07-03-03-11/154-reveng/v19n04/600-v19n04a01.html |
Volume | 19 |
Issue | 4 |
Pages | 287–297 |
Publication | Engenharia na Agricultura |
Date | 2011 |
Extra | 00000 Publisher: Universidade Federal de Viçosa, Departamento de Engenharia Agrícola |
DOI | 10.13083/1414-3984.v19n04a01 |
Library Catalog | Google Scholar |
Language | por |
Abstract | The objective of this study was to develop an equation to estimate longevity of coffee seeds using the Probit Model. Published survival curves of coffee seeds, stored under different temperatures and moisture contents, were transformed to probit and used in linear and non-linear multiple regressions to determine the coefficients of viability equations. The results showed adequate fitting in a quadratic model with a standard deviation of 8.9% germination, compared to 15.1% in the traditional model. The non-linear regression compared to the multiple linear regression, gave lower (1.5 to 2.2 times) standard deviation to determine the coefficient of the equation of the standard deviation of distribution frequency of dead seed during the storage period (σ). The coffee seeds did not behave as orthodox seeds, as indicated by the non linear variations of the logarithm of σ as a function of the variations of the logarithm of the seed moisture content. |
Date Added | 10/11/2021, 12:26:01 AM |
Modified | 10/20/2021, 12:22:46 PM |
Extracted Annotations (10/12/2021, 3:21:44 PM)
"The coffee seeds did not behave as orthodox seeds, as indicated by the non linear variations of the logarithm of σ as a function of the variations of the logarithm of the seed moisture content." (p. 288)
Type | Journal Article |
---|---|
Author | R. F. Araujo |
Author | R. F. da Silva |
Author | E. F. Araujo |
Author | J. B. Zonta |
Author | E. Heberle |
Author | S. M. L. Donzeles |
Author | F. M. G. Zonta |
Volume | 35 |
Issue | 1 |
Pages | 8–18 |
Publication | Revista Brasileira de Armazenamento |
Date | 2010 |
Extra | 00000 Publisher: Centro Nacional de Treinamento em Armazenagem, Universidade Federal de Viçosa |
Library Catalog | Google Scholar |
Date Added | 10/11/2021, 12:26:01 AM |
Modified | 10/11/2021, 12:26:05 AM |
Type | Journal Article |
---|---|
Author | N. Sangeetha |
Author | R. Sankar |
Author | S. Mercy |
Author | A. H. S. Kumari |
Author | M. Kavitha |
Author | D. Ganesh |
Volume | 38 |
Issue | 1 |
Pages | 82–86 |
Publication | Journal of Plantation Crops |
Date | 2010 |
Extra | 00000 Publisher: Central Plantation Crops Research Institute (CPCRI) |
Library Catalog | Google Scholar |
Date Added | 10/11/2021, 12:26:01 AM |
Modified | 10/11/2021, 12:26:06 AM |
Type | Journal Article |
---|---|
Author | Juliana Costa de Rezende |
Author | Ester Alice Ferreira |
Author | Moacir Pasqual |
Author | Fabíola Villa |
Author | César Elias Botelho |
Author | Samuel Pereira de Carvalho |
URL | https://www.researchgate.net/publication/277053560_Desenvolvimento_de_plantula_de_Coffea_arabica_L_atraves_de_embriogenese_somatica_direta |
Volume | 3 |
Issue | 1 |
Pages | 30–37 |
Publication | Coffee Science |
ISSN | 1984-3909 |
Date | 2008 |
Extra | 00000 |
Library Catalog | Google Scholar |
Abstract | This work aimed to develop embryos and acclimatize seedlings of Coffea arabica L. cv. Rubi produced by direct somatic embryogenesis. For the development of somatic embryos, were evaluated the effect of sucrose (0; 15; 30; 45 and 60 g.L -1 ) and GA 3 (0; 2.5; 5 and 10 mg.L -1 ). For the development of seedlings, were evaluated the influence of GA 3 (0; 2.5; 5; 10 mg.L-¹) and NAA (0; 0.25; 0.5; 1; 2 mg L-¹). The in vitro experiments were carried out in a growth chamber under light intensity of 32 µMol.m -2 .s -1 , at the temperature of ± 25 1 o C and photoperiod of 16 hours. The parameters evaluated were: number of leaves, length of the aerial part and fresh weight of the seedlings. For the seedling acclimatization process two types of substrates were tested (Plantmax ® and Plantmax ® plus carbonized rice peels (v/v 1:1) and fertilizer with slow-release (Osmocote ® ) (0, 0.5, 1 and 2 g of the fertilizer per cell). The results indicated that 5.81 mg L -1 GA 3 was efficient for the development of coffee somatic embryos and GA 3 (10 mg. L -1 ) in combination with 1mg. L -1 NAA showed efficiency in the development of the seedlings obtained by direct somatic embryogenesis. The best substrate for acclimatization was Plantmax® mixed with carbonized rice peels and 1.68 g per cell of the Osmocote® fertilizer. |
Date Added | 10/11/2021, 12:26:01 AM |
Modified | 10/18/2021, 10:30:20 PM |
Type | Journal Article |
---|---|
Author | Nino Murvanidze |
Author | Jaroslav Nisler |
Author | Olivier Leroux |
Author | Stefaan PO Werbrouck |
URL | https://link.springer.com/article/10.1007/s10725-021-00708-6 |
Volume | 94 |
Issue | 2 |
Pages | 195–200 |
Publication | Plant Growth Regulation |
Date | 2021 |
Extra | 00000 Publisher: Springer |
DOI | 10.1007/s10725-021-00708-6 |
Library Catalog | Google Scholar |
Abstract | Somatic embryogenesis in Coffea spp. is important for mass production and genetic engineering. Coffee is an exceptional case, as somatic embryogenesis can be induced by applying a cytokinin such as 2iP as the only plant growth regulator. 1-(2-(2-Hydroxyethyl)phenyl)-3-(3-(trifluoromethoxy)phenyl)urea (3TFM-2HE) and 1-(3-bromo-5-(trifluoromethoxy)phenyl)-3-(2-(2-hydroxyethyl)phenyl)urea (3TFM,5Br-2HE) are two newly designed cytokinin oxidase/dehydrogenase inhibitors (CKX) from the diphenylurea group. We used a Coffea arabica leaf disks bioassay to demonstrate the indirect somatic embryo induction potential of these compounds. The leaf disks were incubated on modified Murashige and Skoog (MS) semi-solid medium in which 3TFM-2HE or 3TFM,5Br-2HE were combined with N6-(2-isopentenyl)adenine (2iP). Although these compounds do not possess intrinsic cytokinin activity, they enhanced the activity of 2iP, resulting in direct somatic embryogenesis after seven weeks. The best results were obtained with 1 µM 3TFM-2HE and 5 or 10 µM 2iP. Maturation of somatic embryos into fully developed plants took place on medium supplemented with 0.5 µM kinetin and the somatic embryos developed true leaves and a root system. |
Date Added | 10/11/2021, 12:28:29 AM |
Modified | 10/20/2021, 4:28:45 PM |
Extracted Annotations (10/11/2021, 6:12:22 PM)
"The newly designed compounds 1-(2-(2-Hydroxyethyl) phenyl)-3-(3-(trifluoromethoxy)phenyl)urea (3TFM-2HE) and 1-(3-bromo-5-(trifluoromethoxy)phenyl)-3-(2-(2-hydroxyethyl)phenyl)urea (3TFM,5Br-2HE) are two diphenylurea derivatives that were selected as very strong inhibitors of Arabidopsis thaliana AtCKX2 and maize (Zea mays) ZmCKX1, ZmCKX4a and ZmCKX8 enzymes (Nisler et al. 2020)." (p. 196)
"cyto-s model plant for the first time allowed us to reveal the synergistic effect of CKX inhibitors and 2iP on somatic embryogenesis." (p. 199)
"In this and embryogenic competence for recalcitrant crops. viable embryos in a shorter time, which opens the possibility to improve embryo turnover and offers a tool for coffee breeders and researchers. In general, compounds that can modulate cytokinin levels can positively affect plant tissue culture and perhaps improve modern plant biotechnology." (p. 199)
Type | Journal Article |
---|---|
Author | Ana O. Quintana-Escobar |
Author | Geovanny I. Nic-Can |
Author | Rosa María Galaz Avalos |
Author | Víctor M. Loyola-Vargas |
Author | Elsa Gongora-Castillo |
URL | https://peerj.com/articles/7752/ |
Volume | 7 |
Pages | e7752 |
Publication | PeerJ |
Date | 2019 |
Extra | 00000 Publisher: PeerJ Inc. |
DOI | 10.7717/peerj.7752 |
Library Catalog | Google Scholar |
Abstract | Background Somatic embryogenesis (SE) is a useful biotechnological tool to study the morpho-physiological, biochemical and molecular processes during the development of Coffea canephora. Plant growth regulators (PGR) play a key role during cell differentiation in SE. The Auxin-response-factor (ARF) and Auxin/Indole-3-acetic acid (Aux/IAA) are fundamental components involved in the signaling of the IAA. The IAA signaling pathway activates or represses the expression of genes responsive to auxins during the embryogenic transition of the somatic cells. The growing development of new generation sequencing technologies (NGS), as well as bioinformatics tools, has allowed us to broaden the landscape of SE study of various plant species and identify the genes directly involved. Methods Analysis of transcriptome expression profiles of the C. canephora genome and the identification of a particular set of differentially expressed genes (DEG) during SE are described in this study. Results A total of eight ARF and seven Aux/IAA differentially expressed genes were identified during the different stages of the SE induction process. The quantitative expression analysis showed that ARF18 and ARF5 genes are highly expressed after 21 days of the SE induction, while Aux/IAA7 and Aux/IAA12 genes are repressed. Discussion The results of this study allow a better understanding of the genes involved in the auxin signaling pathway as well as their expression profiles during the SE process. |
Date Added | 10/11/2021, 12:28:29 AM |
Modified | 10/20/2021, 4:12:36 PM |
Type | Journal Article |
---|---|
Author | Sarada Krishnan |
Author | Tom A. Ranker |
Author | Aaron P. Davis |
Author | Jean Jacques Rakotomalala |
Volume | 60 |
Issue | 3 |
Pages | 1021–1036 |
Publication | Genetic resources and crop evolution |
Date | 2013 |
Extra | 00000 Publisher: Springer |
DOI | 10.1007/s10722-012-9898-3 |
Library Catalog | Google Scholar |
Abstract | Madagascar has 59 species of Coffea, of which 42 are listed as Critically Endangered, Endangered, or Vulnerable by criteria of the Red List Category system of the World Conservation Union. In an attempt to assess the conservation value of ex situ collections of Malagasy coffee species, a study was undertaken using the field genebank collections maintained at the Kianjavato Coffee Research Station. Three species were selected for this purpose, C. kianjavatensis, C. montis-sacri, and C. vatovavyensis, and for comparative purposes extant, in situ populations of the same species were studied. Parentage analyses of ex situ propagated offspring of C. kianjavatensis and C. montis-sacri were performed to assess if crossing with other Coffea species maintained in the field genebank is compromising the genetic integrity of the collection. For these three species, higher genetic diversity was observed in the ex situ populations compared to the in situ populations, highlighting the importance of preserving the plants currently in ex situ collections. Parentage analyses of seed-propagated offspring of C. kianjavatensis and C. montis-sacri revealed that cross contamination with pollen from other Coffea species in the ex situ field genebank is occurring. These results have significant implications for the conservation management of wild Coffea species and for the management of ex situ genebanks. |
Short Title | An assessment of the genetic integrity of ex situ germplasm collections of three endangered species of Coffea from Madagascar |
Date Added | 10/11/2021, 12:28:29 AM |
Modified | 10/18/2021, 9:18:08 PM |
Type | Journal Article |
---|---|
Author | María Esther González Vega |
Author | Yanelis Castilla Valdés |
Author | Annia Hernández Rodríguez |
URL | https://revistas.unal.edu.co/index.php/biotecnologia/article/view/22981 |
Volume | 13 |
Issue | 1 |
Pages | 123–131 |
Publication | Revista Colombiana de Biotecnología |
Date | 2011 |
Extra | Obtención de suspensiones celulares y embriones somáticos de cafeto (Coffea canephora P.) con el empleo de metabolitos bacterianos |
Library Catalog | Google Scholar |
Language | es |
Abstract | The somatic embryogenesis is important as model system to study the development of physiologic and molecular events that sustain the embryogenesis in plants, is an appropriate system for the massive propagation of vegetable species and as tool for the genetic improvement, the germplasm conservation and the validation of new biological products and to facilitate the multiplication to great scale through the culture in liquid medium, as well as application in bioreactores, providing high multiplication frequency, quick growth of the embryo, easiness of absorption of nutritious and reduction of the subculturing. In this paper the somatic embryogenesis was used to evaluate the effect of bacterial compounds in the induction of cellular suspensions and somatic embryos in three coffee genotypes of Coffea canephora P. var. Robusta. Were studied inoculo densities among 0.2, 0.5, 1.0 and 3.0 gMF/L-1 and the effect of different culture medium in the development of the process. The results showed a behavior differed in the genotype M-28, in medium culture with conventional regulators of growth and the alternatives. Strong relationship was evidenced between the cellular viability and the number of cells, in the different cultivation conditions and according to the inoculo density, a wide range of size and forms as observed in the populations of somatic embryos. The conversion percentages with the medium MDE-2, evidenced improvements of this indicator for the coffee. |
Date Added | 10/11/2021, 12:28:29 AM |
Modified | 10/20/2021, 12:15:28 PM |
Type | Journal Article |
---|---|
Author | K. Nasiro |
URL | http://www.ijagbio.com/pdf-files/volume-9-no-6-2020/278-283.pdf |
Volume | 9 |
Issue | 6 |
Pages | 278–283 |
Publication | International Journal of Agriculture and Biosciences |
ISSN | 2306-3599 |
Date | 2020 |
Extra | 00000 Publisher: Faculty of Agriculture, Nnamdi Azikiwe University |
Library Catalog | Google Scholar |
Abstract | Coffee is one of the most important agricultural products in the international market and many countries are involved in its production, trade or consumption. Arabica coffee is self-pollinated and homozygous, they are normally propagated by seeds. Seeds have been considered intermediate storage behavior with varying results. It is highly desirable that seeds are stored safely to optimize coffee seedling production at the appropriate time and season with ideal climatic conditions for planting in the field. The objective of this study was to evaluate the effect of storage temperature, time of storage and initial seed moisture content on early seedling performances of coffee seeds and to determine the appropriate seed handling method. In this experiment, the influence of initial seed moisture content with four levels (12, 17, 22 & 27%) storage temperature (ST) with two levels (15 o C & ambient), time of storage with six levels (sowing after 1,2,3,4,5 & 6 months) and on coffee seedling growth stages were studied in a split-split-plot factorial design. The data collected were subjected to Analysis of Variance (ANOVA) using statistical analysis system version 9.2 software (SAS, 2009). Treatment means were separated using LSD at 0.05 probability level. The present findings of storage environment with cold temperature (15 o C) accelerated seedling growth much better than did ambient temperature condition. All tested seedling growth stages were faster at initial time of storage. After third month of storage, seed quality drastically reduced especially under ambient storage condition. Seeds dried to 12% moisture content showed delay of germination and growth throughout the trial period. Seeds with 27% initial moisture content took shorter time to reach at different growth stages at initial storage time but when aged took much time. Storage temperature, time of storage and initial seed moisture contents showed highly significant main and interaction effects and seeds dried to intermediate moisture level (17 & 22%), stored under cold temperature and sown at early times resulted in enhanced seedling growth. Hence, the current study suggests drying coffee seeds to 17% to 22% moisture contents and store under relatively lower temperatures at about 15 o C for not more than six months of storage. As the present finding was limited to single cultivar and specific environmental condition further investigation is significant. |
Date Added | 10/11/2021, 12:28:29 AM |
Modified | 10/20/2021, 7:10:32 PM |
Extracted Annotations (10/11/2021, 6:30:16 PM)
"at an altitude of 1750 meters above sea level, 70 46" N, latitude, and 36047" E longitude in the sub humid tropical belt of south western Ethiopia." (p. 279)
"Average annual rain fall of the area is 1594 mm with 67% mean relative humidity. The mean minimum and maximum temperatures are about 11.60C and 26.30C respectively. The soil of the center has a characteristic of reddish to reddish brown clay nature, where eruticnitosols and chronic cambisols are dominant types with pH range of 5 to 6." (p. 279)
"fully ripe red cherries were harvested from selected mother trees in the seed orchard of cultivar 74110" (p. 279)
"The cherries were sorted out and pulped in a hand pulp separator. After pulping the selected cherries, the wet parchment beans were again sorted out, thoroughly washed, and taken to drying room, hut made of grass roof." (p. 279)
"Then the wet parchment coffee was laid on wire mesh for drying under shade and when its skin dried dressed in fine wood ash following the JARC conventional practice and kept till it attained the desired four levels of moisture contents (27, 22, 17 and 12% [fresh weight base])." (p. 279)
"All tested seed and seedling growth parameters were highest at initial time of storage and declined progressively with storage time." (p. 282)
"After third month seed quality drastically reduced especially under ambient storage condition." (p. 282)
"Seed stored under cold condition recorded minimum qualitative losses with better seed quality parameters throughout the storage period as compared to seeds stored under ambient condition. Seeds stored in cold condition maintained viability and vigor for longer period with minimum deterioration in seed quality." (p. 282)
"Seeds with 27% initial moisture content showed higher performances at initial storage time but when aged drastically declined." (p. 282)
"Seeds dried to 22% followed by 17% initial moisture contents maintained higher germination, seedling emergence and early seedling growth parameters and stored at relatively lower temperatures. If stored under ambient condition should not be stored for longer than two to three months." (p. 282)
"Hence, for storing coffee seeds, it is advisable drying the seeds to about 17% to 22% moisture contents and keep under storage with relatively lower temperatures (at about 15oC) for not more than five or sixmonths of storage is advisable." (p. 283)
"For immediate sowing of coffee seeds higher seed moisture content of 27% may be used for better seed germination and early growth potentials that result in vigorous seedling." (p. 283)
"The experiments conducted so far in this area are not sufficient to draw a reliable conclusion. Since, the present study was done for a single cultivar (74110) and under Jimma conditions further experiment needs to be conducted for varieties at different environmental conditions with narrower ranges of seed initial moisture content and storage temperatures." (p. 283)
Type | Conference Paper |
---|---|
Author | A. Pallavicini |
Author | L. del Terra |
Author | B. de Nardi |
Author | P. Rovelli |
Author | G. Graziosi |
URL | https://www.asic-cafe.org/conference/19th-international-scientific-colloquium-coffee/catalogue-genes-expressed-coffea-arabica |
Publisher | Association Scientifique Internationale du Café (ASIC) |
Pages | 1–7 |
Date | 2001 |
Library Catalog | Google Scholar |
Proceedings Title | 19ème Colloque Scientifique International sur le Café, Trieste, Italy, 14-18 mai 2001 |
Date Added | 10/11/2021, 12:28:29 AM |
Modified | 10/18/2021, 7:58:48 PM |
Type | Book Section |
---|---|
Author | M. Pasqual |
Author | J. M. Cavalcante-Alves |
Author | LMCO Andrade |
Author | A. B. Pereira |
Author | A. L. R. Maciel |
Author | R. D. de Castro |
URL | https://link.springer.com/chapter/10.1007/978-94-017-1068-8_14 |
Publisher | Springer |
Pages | 171–178 |
Date | 2000 |
Extra | 10.1007/978-94-017-1068-8_14 |
Library Catalog | Google Scholar |
Abstract | Inter-specific and inter-generic crossing offer plant breeders a way to increase genetic variability and transfer of desirable genes among species, especially from wild plants to cultivated ones (Gomathinayagam et al., 1998). The use of hybridization between different species is frequently limited due to failures that can occur during pre- and post-fertilization, which can affect endosperm and/or embryo development leading to abortion or degeneration before maturation is reached (Mallikarjuna, 1999; Sukno et al., 1999; Angra et al., 1999). Hybrid embryos can be saved if they are removed before abortion and artificially cultivated in a nutritive medium (Asano and Imagawa, 1999). The embryo originated from a normal fecundation process can easily be separated and cultivated in aseptic conditions in an adequate culture medium. This will maintain them genetically stable, producing identical descendant to them. For the removal of the embryo, one need only to disinfect the external surface of the seed due to the fact that the embryo is located inside, in an sterile region of the seed. Therefore the in vitro contamination rate is very low in comparison to other cultures (Illg, 1985). |
Book Title | Coffee Biotechnology and Quality |
Short Title | In vitro embryo culture of Coffea arabica |
Date Added | 10/11/2021, 2:23:22 AM |
Modified | 10/18/2021, 10:50:06 PM |
Type | Journal Article |
---|---|
Author | Natália Chagas Freitas |
Author | Horllys Gomes Barreto |
Author | Christiane Noronha Fernandes-Brum |
Author | Rafael Oliveira Moreira |
Author | Antonio Chalfun-Junior |
Author | Luciano Vilela Paiva |
Volume | 128 |
Issue | 3 |
Pages | 663–678 |
Publication | Plant Cell, Tissue and Organ Culture (PCTOC) |
Date | 2017 |
Extra | 00000 Publisher: Springer |
DOI | 10.1007/s11240-016-1147-6 |
Library Catalog | Google Scholar |
Abstract | Quantitative real-time PCR (qPCR) is a sensitive method used to investigate relevant changes in gene expression during somatic embryogenesis. Understanding its regulatory network might be helpful to the process of induction of embryos and facilitate the development of efficient plant regeneration procedures. In this study, a set of 12 genes was selected and their stability was assessed in different tissues of somatic embryogenesis-related cultures of Coffea arabica. Analyses of gene expression stability were performed using the RefFinder tool that integrates the geNorm, NormFinder, BestKeeper and Delta-Ct algorithms. Among the all candidate reference genes studied, APRT/EF1a, UBQ/ACT, ACT/24S, RPL39/24S, PP2A/RPL39, PP2A/AP47, emerged as the most stable for normalization of qPCR analyses of embryogenic cell suspensions, non-embryogenic calli, embryogenic calli, com- bined embryogenic and non-embryogenic calli, somatic embryos and plantlet, respectively. A combination of two genes, 24S and PP2A, was identiied as most suitable ref- erence genes across all samples for the C. arabica tissues studied. The commonly employed reference gene encoding glyceraldehyde-3-phosphate dehydrogenase (GAPDH) was found to be inappropriate as a reference gene for embryogenic tissues of C. arabica. In addition, Baby boom (BBM) gene expression was investigated to confirm the validity of the selected reference genes, the transcript levels of gene were overestimated when unsuitable reference genes were used for normalization. The results shown herein will permit a more precise and reliable normalization of qPCR in experiments involving somatic embryogenesis of C. arabica. |
Date Added | 10/11/2021, 2:23:22 AM |
Modified | 10/11/2021, 9:05:54 PM |
Type | Journal Article |
---|---|
Author | Roberto Gamboa-Becerra |
Author | María Cecilia Hernández-Hernández |
Author | Óscar González-Ríos |
Author | Mirna L. Suárez-Quiroz |
Author | Eligio Gálvez-Ponce |
Author | José Juan Ordaz-Ortiz |
Author | Robert Winkler |
URL | https://www.mdpi.com/2218-1989/9/10/214 |
Volume | 9 |
Issue | 10 |
Pages | 214 |
Publication | Metabolites |
Date | 2019 |
Extra | 00000 Publisher: Multidisciplinary Digital Publishing Institute |
DOI | 10.3390/metabo9100214 |
Library Catalog | Google Scholar |
Abstract | Genetic improvement of coffee plants represents a great challenge for breeders. Conventional breeding takes a too long time for responding timely to market demands, climatic variations and new biological threads. The correlation of genetic markers with the plant phenotype and final product quality is usually poor. Additionally, the creation and use of genetically modified organisms (GMOs) are often legally restricted and rejected by customers that demand natural products. Therefore, we developed a non-targeted metabolomics approach to accelerate conventional breeding. Our main idea was to identify highly heritable metabolites in Coffea canephora seedlings, which are linked to coffee cup quality. We employed a maternal half-sibs approach to estimate the metabolites heritability in open-pollinated plants in both leaves and fruits at an early plant development stage. We evaluated the cup quality of roasted beans and correlated highly heritable metabolites with sensory quality traits of the coffee beverage. Our results provide new insights about the heritability of metabolites of C. canephora plants. Furthermore, we found strong correlations between highly heritable metabolites and sensory traits of coffee beverage. We revealed metabolites that serve as predictive metabolite markers at an early development stage of coffee plants. Informed decisions can be made on plants of six months old, compared to 3.5 to 5 years using conventional selection methods. The metabolome-wide association study (MWAS) drastically accelerates the selection of C. canephora plants with desirable characteristics and represents a novel approach for the focused breeding of crops. |
Date Added | 10/11/2021, 2:23:22 AM |
Modified | 10/20/2021, 5:48:31 PM |
Type | Journal Article |
---|---|
Author | Julieta Andrea Silva de Almeida |
Author | Maria Bernadete Silvarolla |
URL | http://www.globalsciencebooks.info/Online/GSBOnline/images/0906/IJPDB_3(1)/IJPDB_3(1)5-9o.pdf |
Volume | 3 |
Issue | 1 |
Pages | 5–9 |
Publication | International Journal of Plant Developmental Biology |
Date | 2009 |
Extra | 00000 |
Library Catalog | Google Scholar |
Abstract | The objective of the present study was to verify the effect of adding 6-benzyladenine (6-BA) on somatic embryogenesis of Coffea arabica genotypes AC1, AC2, AC3 and Mundo Novo cv. ‘IAC 376-4’. Rectangular foliar explants of these genotypes were inoculated into a single semi-solid culture medium consisting of 1⁄2 MS salts supplemented with 10, 15, 20, 30, 40 and 50 M 6-BA, respectively and kept in the dark at 25°C. The treatments were evaluated with respect to the number of sides of the explant showing formation of structures, an estimate of the size of the structure formed by the explant and the total number of somatic embryos (SEs) produced. The formation of small structures (3 mm) on the borders of the explants of AC and ‘Mundo Novo’ was observed and these subsequently developed SEs when cultured in medium supplemented with lower concentrations of 6-BA tested (10, 15, 20 or 30 μM). In addition, SEs were also formed directly on the borders of the explants. Another aspect of the present study is the formation of SEs as a response to 6-BA as the sole growth regulator and their development in a single culture medium, in a single phase. This culture method results in a reduction in time, handling and consumables, thus being more advantageous, in addition to opening perspectives for its use with other C. arabica genotypes. |
Date Added | 10/11/2021, 2:23:22 AM |
Modified | 10/20/2021, 12:36:21 AM |
Type | Thesis |
---|---|
Author | Hien Nguyen Thi |
URL | https://dspace.uclv.edu.cu/handle/123456789/700 |
Date | 2014 |
Extra | 00000 |
Library Catalog | Google Scholar |
Type | PhD Thesis |
Language | spa |
University | Universidad Central "Marta Abreu" De Las Villas |
Abstract | The cultivation of coffee constitutes an important area to increase the income of the national economy from the export of the grain. The development of somatic embryogenesis of coffee in liquid culture media is a viable alternative for the propagation of this species. The use of culture media in liquid state combined with culture systems based on the temporary immersion of the explants, could increase germination and improve the quality of the plants for their conversion under ex vitro conditions. To this end, the objective of determining the effect of inoculation density on the germination of somatic embryos of Coffea arabica L. cv. Red Caturra in Temporary Immersion Systems type RITA®, in addition to evaluating the effect of the composition and type of substrate on the growth and development of plants in the acclimatization phase. Different inoculum densities were used (40, 50, 60, 70 and 80 somatic embryos by RITA®). At 90 days of culture, morphological variables were evaluated such as: the number of somatic embryos with partial and total germination, symptoms of hyperhydricity, number of true leaves, length and root development. While, in the acclimatization phase, different substrate compositions were used (85% earthworm humus-15% Zeolite, 75% earthworm humus-25% Zeolite, 65% earthworm humus-35% Zeolite, 50% earthworm humus -50% Zeolite) and it was evaluated: the height of the plants, the number of leaves, the length of the main root, the fresh mass, the dry mass, the foliar area. The best result in Temporary Immersion Systems type RITA® was achieved with an inoculum density of 70 ES per RITA® with 60% germination and with a good development of plant length and number of leaves compared to the others. treatments. Good development and survival of the plants from somatic embryogenesis was achieved in the different composition and type of substrate treatments. However, the best result in terms of the morphological development of the plants was obtained with the substrates composed of 75% Worm Humus-25% Zeolite and 85% Worm Humus-15% Zeolite, with a survival of 100 and 96.4% respectively. . |
# of Pages | 73 |
Date Added | 10/11/2021, 2:23:22 AM |
Modified | 10/19/2021, 1:08:16 AM |
Type | Thesis |
---|---|
Author | D. J. A. Walyaro |
URL | https://library.wur.nl/WebQuery/wurpubs/77526 |
Date | 1983 |
Extra | 00000 |
Library Catalog | Google Scholar |
Type | PhD Thesis |
University | Wageningen University & Research |
Abstract | Variation for growth., yield and quality characters was studied in a diallel cross among 11 varieties of arabica coffee. The objective was to demonstrate the possible application of such information in breeding programmes for improved yield and coffee quality. Growth characters especially girth, height, internode length on stem and primaries, and canopy radius had a high repeatability. Such characters are heritable, even with a single measurement taken on young coffee trees. For most yield characters, a good assessment can only be obtained if it is based on the mean of several years' records Regarding quality characters, single berry weight, % AA, %AB and %PB showed a high heritability. Genetic variation for selected growth and yield characters was due to genes with additive and dominance effects. There was also evidence of epistatic effects among genes governing most of these characters, and especially so for yield. As a consequence many of the F 1 hybrids displayed considerable hybrid vigour varying between 10% to over 200% above the better parent. Variation for quality characters was chiefly due to the additive genetic effects, specific combining ability being relatively unimportant. A detailed study of genotype-environment interactions revealed that it is possible to select for high yielding genotypes with the desired level of linear response to environments. Yield stability and compact growth are characters that could be selected for independently. Quality characters in general were relatively less influenced by effects of genotype-environment interactions. Height and angle of primaries could be selected on basis of 1 year old seedlings in the nursery. It is also possible to base individual tree selection for yield on performance of fairly young coffee trees. This entails use of a preselection index comprising for instance, girth, canopy radius or internode length on primaries, bearing primaries or % bearing nodes, plus yield of the first 2-3 years of individual trees. For coffee quality, rapid improvement could be obtained by basing selection on %AA for bean size, and on the overall standard for liquor quality. The first year's assessment of these characters is already sufficient for selection purposes. Implications of these results in breeding programmes are discussed. A breeding scheme is proposed aimed at developing compact high yielding coffee varieties with good quality which also combine resistance to the two main diseases of arabica coffee, coffee berry disease and coffee rust. The breeding scheme entails either development of hybrid varieties, or a programme of further selection to derive seed varieties. Important features of such a scheme are, 1) the use of information on genetic basis of variation for certain characters in planning hybridization programmes and, 2) a drastically reduced breeding cycle per generation as a result of basing selection, within each generation, on fairly young coffee trees. |
# of Pages | 129 |
Date Added | 10/11/2021, 2:23:22 AM |
Modified | 10/20/2021, 12:13:08 PM |
Type | Journal Article |
---|---|
Author | De Guglielmo-Cróquer |
Author | I. Altosaar |
Author | M. Zaidi |
Author | A. Menéndez-Yuffá |
URL | https://www.scielo.br/j/bjb/a/5Hh7V4PV6DhwNfKjMY73Y3f |
Volume | 70 |
Pages | 387–393 |
Publication | Brazilian Journal of Biology |
Date | 2010 |
Extra | 00000 Publisher: SciELO Brasil |
DOI | 10.1590/S1519-69842010000200022 |
Library Catalog | Google Scholar |
Abstract | The transformation of coffee plantlets with the cry1ac gene of Bacillus thuringiensis was achieved by biolistic using either the whole pUBC plasmid or only the ubi-cry1ac-nos genetic cassette. The cry1ac gene was inserted into coffee plants in order to confer resistance to the leaf miner Leucoptera coffeella, an insect responsible for considerable losses in coffee crops. Bearing in mind that the genetic cassettes used for this study lack reporter genes and/or selection marker genes, the parameters for the transformation procedure by biolistic were previously standardised with a plasmid carrying the gus reporter gene. The presence of the cry1ac gene in young plantlet tissues was determined by PCR, Southern blot and reverse transcription-PCR. Our results show that the obtainment of viable coffee plantlets, transformed by bombardment with the cry1ac gene and without selection markers nor reporter genes, is feasible. |
Date Added | 10/11/2021, 2:23:22 AM |
Modified | 10/20/2021, 6:14:15 PM |
Type | Thesis |
---|---|
Author | Diriba Muleta |
URL | https://pub.epsilon.slu.se/1657/ |
Place | Uppsala |
Date | 2007 |
Extra | ISBN 978-91-85913-16-9 |
Library Catalog | Google Scholar |
Language | en |
University | Swedish University of Agricultural Sciences |
Abstract | Arabica coffee is the key cash crop and top mainstay of the Ethiopian economy and requires sustainable production methods. Southwestern natural forests, the site of this study, are believed to be the centre of origin and diversity for Coffea arabica and still harbour wild Arabica coffee that may serve as an important gene pool for future breeding. Cost reductions, sustainability and quality improvement are now the major priorities in coffee production systems and require organic growing of coffee. Current developments in sustainability involve rational exploitation of soil microbial activities that positively affect plant growth and this study examines this possibility. The composition of coffee shade tree species and density of arbuscular mycorrhizal fungi (AMF) spores and coffee-associated rhizobacteria in different coffee production systems in southwestern Ethiopia were investigated. The main objectives were to: 1) systematically identify the dominant coffee shade tree species; 2) quantify and characterize AMF populations with respect to spatial distribution; 3) screen for beneficial rhizobacteria (microbial biofertilizers and biocontrol agents), particularly in the rhizosphere of coffee plants; and 4) characterize rhizobacterial isolates of particular interest using molecular tools (polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis and 16S rDNA gene sequencing). Sampling and determination of microbial functional characteristics followed standard methods. Nineteen dominant shade tree species belonging to 14 plant families were identified, with the tree legume (Millettia ferruginea) dominating. All soil samples contained AMF spores and members of the Glomeromycota, Glomus spp. dominating. AMF spore density was affected by sampling point, site, depth, shade tree species and shade tree/coffee plant age. Coffee-associated rhizobacterial isolates showed multiple beneficial traits (phosphate solubilization, production of organic acids, siderophores, indoleacetic acid, hydrogen cyanide, lytic enzymes and degradation of an ethylene precursor). Many isolates also revealed a potent inhibitory effect against emerging fungal coffee pathogens such as Fusarium xylarioides, F. stilboides and F. oxysporum. According to in vitro studies Bacillus, Erwinia, Ochrobactrum, Pseudomonas, and Serratia spp. were the most important isolates to act as potential biofertilizers, biocontrol agents or both. Thus, these indigenous isolates deserve particular attention and further greenhouse and field trials could ascertain their future applicability for inoculum development. |
# of Pages | 67 |
Date Added | 10/11/2021, 2:25:56 AM |
Modified | 10/20/2021, 6:40:53 PM |
Type | Journal Article |
---|---|
Author | Feyera Senbeta |
Author | Manfred Denich |
Author | Hans Juergen Boehmer |
Author | Tadesse Woldemariam |
Author | Demel Teketay |
Author | Sebsebe Demissew |
URL | https://www.ajol.info//index.php/sinet/article/view/18278 |
Volume | 30 |
Issue | 1 |
Pages | 13–24 |
Publication | SINET: Ethiopian Journal of Science |
ISSN | 2520-7997 |
Date | 2007 |
Extra | 00000 |
DOI | 10.4314/sinet.v30i1.18278 |
Library Catalog | Google Scholar |
Abstract | Coffea arabica is native to the Afromontane rainforests of Ethiopia. These rainforests are the last refugia for wild genetic resources of Arabica coffee. To understand the ecological characteristics and the conservation options of wild coffee populations, a study was conducted in Bonga, Harenna, Maji, Berhane-Kontir and Yayu forests. In each forest, quadrants of 20 x 20 m were laid along transects to collect coffee related data. Wild populations of Arabica coffee are distributed over a wide range of geographical regions, but locally have a patchy distribution in the rainforests. The highest abundance of wild coffee plants per plot was recorded in Yayu and the lowest in the Bonga/Berhane-Kontir forests. A low frequency of occurrence was observed in Harenna (71%) and the highest in Maji and Yayu forests (100%). This is related to the major spatial discontinuities caused by factors in edaphic, biotic, microclimatic and topographic features. Wild coffee occurs mostly between 1000 m and 2000 m but its critical altitude is between 1300 m and 1600 m. There is a negative correlation between the abundance of wild coffee and an increase in slope angle. The wild populations of Arabica coffee are also influenced by the structural arrangement of the forest. Slight forest disturbance such as selective tree cutting may create favorable environmental conditions for coffee recruitment. However, serious disturbances such as overgrazing can limit the regeneration capacity of coffee plants in the forest. To conserve the greatest possible amount of wild coffee populations, the rainforests must be maintained and not converted to other types of land use. Nature reserve networks should be established across the Afromontane rainforests of Ethiopia. |
Short Title | Wild Coffea arabica L. in Afromontane rainforests of Ethiopia |
Date Added | 10/11/2021, 2:25:56 AM |
Modified | 10/20/2021, 3:50:33 PM |
Type | Book Section |
---|---|
Author | J. Spiral |
Author | Thierry Leroy |
Author | M. Paillard |
Author | Vincent Pétiard |
URL | https://link.springer.com/chapter/10.1007/978-3-642-59609-4_5 |
Publisher | Springer |
Pages | 55–76 |
ISBN | 978-3-642-59609-4 |
Date | 2000 |
Extra | 10.1007/978-3-642-59609-4_5 |
Library Catalog | Google Scholar |
Language | en |
Abstract | The coffee crop is of great economic importance; cultivated coffee presently covers 11.6 × 106ha worldwide, and the production of green beans totaled 9.6 ×106tons in 1996. The genus Coffea is represented by more than 70 species and forms part of the large family of the Rubiaceae. Commercially, C arabica and C canephora are the main species harvested (Coste 1989). Coffee is one of the most important commodity products in international trade, the second after petroleum; but, in spite of the economic importance of the best-flavored species, Arabica (Coffea arabica L), relatively few breeding varieties (lines or hybrids) are cultivated. In contrast, the Robusta species (Coffea canephora Pierre), which has less desirable attributes, has a wide diversity of clones in cultivation. |
Book Title | Transgenic trees |
Date Added | 10/11/2021, 2:28:38 AM |
Modified | 10/20/2021, 12:18:47 PM |
Type | Journal Article |
---|---|
Author | Samuel Fru Billa |
Author | Ajebesone Francis Ngome |
Author | Tata Precillia Ngome |
Author | Tsi Evaristus Angwafo |
Volume | 6 |
Issue | 1 |
Pages | 9–19 |
Publication | Current Research in Agricultural Sciences |
ISSN | 2312-6418 |
Date | 2019 |
Extra | 00000 Publisher: Conscientia Beam |
DOI | 10.18488/journal.68.2019.61.9.19 |
Library Catalog | Google Scholar |
Abstract | Young coffee plants at nursery particularly after transplanting are very sensitive to weed infestation. Therefore, timely weeding is necessary to boost seedling vegetative growth. A pot experiment was conducted from 2017-18 at IRAD, Foumbot multipurpose research station, Cameroon. The main objective was to assess the influence of biochar and poultry manure on weed infestation and growth of arabica coffee seedlings. The biochar was produced using an Elsa pyrolysis barrel at 450 0 C with 58 min carbonisation time from corncobs. The biochar were milled to < 2mm and mixed at the rate of 20, 30 and 40t/ha -1 with 40t/ha -1 poultry manure and soil before applying to 0.01 m 2 polythene bags with five replications. Results showed that the 20t/ha -1 biochar + 40t/ha -1 poultry manure treatment significantly (P < 0.05) increased plant height, stem girth, number of leaves, and leaf area compared to control (poultry manure only). Treatments with 30t/ha -1 and 40t/ha -1 biochar had the lowest weed fresh weight and dry weight. Cyperus rotundus, Oxalis cornoculata and Cynodon nlemfuensis were most economically important weeds scored for their abundance and persistence. Overall, weed control efficiency was lowest in sole 40t/ha -1 poultry manure and 20t/ha - 1 biochar treatment with 18% and 20% compared to 40t/ha -1 and 30t/ha -1 biochar treatment with 35% and 24% respectively. The results demonstrated that combined application of poultry manure and biochar appears essential for a sustainable coffee seedling production in the Western Highlands of Cameroon. However, to enhance coffee seedling growth using biochar, the use of recommended doses is paramount. |
Date Added | 10/11/2021, 2:28:38 AM |
Modified | 10/11/2021, 9:14:10 PM |
Extracted Annotations (10/11/2021, 6:58:39 PM)
"nursery is located between latitude 5°14'-5°48' N and longitude 10°27'-10°47' E at an altitude of 1100 m above sea level. The area has a montane tropical climate characterised by unimodal annual rainfall distribution of 1713 mm with average temperatures of 21 0C. The soil at the experimental site was an andosol soil type, according to the world reference base for soil classification." (p. 11)
"Shading net made from nylon with light intensity 50% was used as shading in the nursery." (p. 11)
"The treatment consisted of a mixture of biochar (0, 20, 30 and 40 tons ha-1) and poultry manure (PM) (recommended 40 tons ha-1application rate)." (p. 11)
"Biochar was produced under fast pyrolysis at 450 0C with the resident time of 52 min from corn cobs and ricehusk using an Elsa pyrolysis barrel [20, 25]. The biochar was later milled to pass through a 2 mm sieve." (p. 11)
"Seedlings of Coffea arabica L. cv. Marcellesa with well-developed and straight tap roots were transplanted in to 10 x 20 cm polythene bags at the matchstick or cotyledon (butterfly) stage." (p. 11)
"All pots were fertilized with urea (46 % N: 0: 0) at 2g/pot in two equal splits i.e. at 12 weeks after planting and 12 weeks later in accordance with the farming practice." (p. 11)
"At three months after planting, foliar was applied to all pots at 60 g/10 L of water every 15 days until the leaves become dark green." (p. 11)
"Results in Figure 1 show significant differences in the coffee seedling growth parameters amongst treatments. The coffee seedlings fertilized with biochar and poultry manure treatments had relatively higher (P < 0.05) average number of leaves per plant probably due to the production of many leaves on plagiotropic branches, followed by seedlings fertilised 40 t/ha-1 biochar and 40 t/ha-1 poultry manure which exhibited a non-significant difference in the average number of leaves per plant Figure 1a." (p. 13)
"The study shows that, the combination of biochar with poultry manure is advantageous over the sole poultry manure amendment providing evidence for biochar poultry manure synergism [11, 31]." (p. 14)
"According to Schulz and Glaser [9] it could be expected that, poultry manure treatment was rapidly mineralized compared to poultry manure biochar mixtures where nutrient retention was significantly more efficient." (p. 14)
"Generally, weed infestation was significantly higher (P < 0.05) and more severe in the control (sole 40t/ha-1 poultry manure) treatment compared to the biochar fertilized treatments Figure 2." (p. 14)
"The results of this study suggest the ability of biochar to reduce weed interference in coffee nurseries." (p. 15)
"The slow coffee seedling growth from soils amended with 30 and 40t/ha-1 biochar may also be due to the high pH of the biochar (pH 10.42)." (p. 16)
"The observed significant low weed biomass in the 20t/ha-1 biochar + 40t/ha-1 poultry manure compared to the sole 40t/ha-1 poultry treatment could be due to the formation of a canopy as a result of rapid vegetative growth of the coffee seedlings, providing shade that reduced the growth of important weeds species [27]." (p. 17)
"The relatively low weed biomass and control efficiency values observed in the 30 and 40t/ha-1 biochar treatment pots could be due to the general slow growth of plants and weed species in these treatments which also explains the reduction in coffee height, leaf area index and stem diameter Figure 1." (p. 17)
"The application of 20t/ha-1 biochar and 40t/ha-1 poultry manure were observed as the optimum agronomic interventions to harness best foliage production and also reducing weed infestation in coffee nurseries." (p. 17)
Type | Thesis |
---|---|
Author | Luciana Marques da Cunha Oliveira Andrade |
URL | http://www.sbicafe.ufv.br/handle/123456789/58 |
Place | Lavras, Minas Gerais, Brasil |
Date | 1998 |
Extra | 00000 Publisher: Universidade Federal de Lavras |
Library Catalog | Google Scholar |
Language | por |
University | Universidade Federal de Lavras |
Abstract | The purpose of this work were to test tissue culture methodologies of: the anthers culture, the micropropagation and the embryos culture for the coffe cultures "in lives" that belong to the Universidade Federal de Lavras (UFLA). For that, it was necessary to determine the ideal floral bud size for the obtantion of haploids plants through the anthers culture. Also, to determine in micropropagation: the best concentrations of the growth regulators BAP (6-benzilaminopurina), GA3 (giberelic acid) and TDZ (N-phenil-N-1,2,3-thiadiazol-5-iluréia). Finally, in the embryos culture: to determine which were the best concentrations of the growth regulators ANA (naftalenacetic acid) and BAP(6-benzilaminopurine). For the morphologic and cytological evaluations, were used floral buds of 4 cultivates of Coffea arabica: cv.Mundo Novo, Catuaí, Icatú and Rubí. Morphologic and cytological analyses were accomplished, by observing that, for all the genotipes, the microspore non vacuolated (with central nucleus, ideal for the haploids obtained through the anthers culture), happens frequently in floral buds they vary in length from 4,5 to 6,0 mm, anthers varying from 4,5 to 5,5 mm length. For the micropropagation experiments, were used like explants microestacas of cultivating Catuaí, where several combinations were tested among the growth regulators BAP and GA3 (mg/l) and of TDZ and GA3, resulting in a factor 4x5, disposed entirely in a completely randomyzed. To verify the effect of the different combinations of the growth regulators, there were made periodic evaluations with there relationship of the total shoot number, larger sprouts than a centimeter, total leaf number, weight of the fresh and dry matter of the shoot. The best results for the combination of BAP and GA3 were obtained in the absence of GA3 and presence of BAP. For the combination TDZ and GA3, the best results were obtained when the maximum concentration of GA3 was associated to the minimum concentrations of TDZ. In the culture of embryos, were used embryos of the cv. Catuaí, in which combinations were tested among concentrations of the growth regulators ANA and BAP, resulting in a fator 4x4, disposed entirely in a completely randomyzed. For all the characteristics, the best results were observed in the concentration of BAP, the same to 7,40 mg/l, associated ANA’s concentration, the same to 1,0 mg/l. Models of answer surface were used in the micropropagation experiments and embryos culture, for optimize the concentrations of the used growth regulators. This work belongs to the program of improvement of the coffee culture of the Universidade Federal de Lavras (UFLA). |
# of Pages | 102 |
Date Added | 10/11/2021, 2:28:38 AM |
Modified | 10/20/2021, 12:18:54 AM |
Type | Journal Article |
---|---|
Author | Sttella Dellyzete Veiga Franco da Rosa |
Author | Leonardo Q. de Melo |
Author | André Delly Veiga |
Author | Sirlei de Oliveira |
Author | Carlos Alberto Spaggiari Souza |
Author | Vinícius de Araújo Aguiar |
URL | https://www.scielo.br/j/cagro/a/Tm9mC9RsXbmfkGmcDczJFHS/abstract/?lang=pt |
Volume | 31 |
Issue | 2 |
Pages | 349–356 |
Publication | Ciência e Agrotecnologia |
Date | 2007 |
Extra | 00000 Publisher: SciELO Brasil |
DOI | 10.1590/S1413-70542007000200013 |
Library Catalog | Google Scholar |
Language | por |
Abstract | Coffee seeds present slow germination and poor storage potential, which makes it difficult to seedling formation in a suitable time and under climatic conditions favorable to the crop establishment. The propagation of the coffee plant by means of seedlings Coming from Seeds is Still Widely Achieved and Reducing of the Time is highly desirable, aiming at a good establishment of the stand and the reduction of the percentage of replanting. considering that coffee seeds achieve their maximum germination at the green yellowish and red ripe stages, the present work was undertaken with the purpose of testing an alternative to obtain seedlings, by using both berries and seeds at several developmental stages. the experiment It was conducted in the Seedling Nursery of the Coffee Culture Sector at the Federal University of Lavras. The design was in randomized blocks with four replicates and the seedlings were produced in bags with substrate of earth, manure, simple superphosphate and potassium chlorite (standard substrate). Nine sowing treatments were tested by utilizing seeds or berries Coffea arabica L. cv. Ruby: 1) berries at the green stage; 2) berries at the green stage 10 days after harvest; 3) berries at the green yellowish stage; 4) berries until the green yellowish stage 10 days after harvest; 5) berries at the red ripe stage; 6) seeds from red ripe dried berries to 15% of the water content; 7) seeds from red ripe berries dried to 15% and without parchment; 8) seeds from red ripe berries, dried to 15% of water parchment and with a parchment and pre-soaked in water for six days; and 9) seed from red ripe berry, dried to 15% without a parchment and pre-soaked in water for six days. One hundred and forty days after the start of the experiment, the percentage of emergence (E), emergency velocity index (EVI) and the percentage of seedlings with at least one pair of true leaves (TL) were evaluated. One hundred and eighty after the start of the experiment, the evaluation of the seedlings was proceeded by means of the measurements of stem diameter (D), seedling height (H), root system dry matter (RSDM), shoot dry matter (SDM), leaf area (LA) |
Date Added | 10/11/2021, 2:30:37 AM |
Modified | 10/20/2021, 7:21:24 PM |
The experiment was carried out in the nursery of the Sector of Coffee Growing/DAG at UFLA, from June to December 2003. Fruits and seeds from Coffea arabica L. cv. Ruby, collected in an experimental field of the University.
Sowing was carried out in the month of May 2002 consisting of the following treatments: 1) fruits in the green stadium; 2) fruits in the green stage, ten days after the harvest, kept at room temperature; 3) fruits in the green cane stadium; 4) fruits in the green cane stage, ten days after harvest, kept at room temperature; 5) fruits at the cherry stage; 6) cherry seeds pulped in a manual pulper and demucilated by natural fermentation in water at 30ºC for 24 hours, washed and dried to 15% water content; 7) fruit seeds- cherry pulped in a manual pulper and mucilated by natural fermentation in water at 30ºC for 24 hours, washed and dried up to 15% and without parchment; 8) seeds of pulped cherry fruits in a manual pulper and demucilled by natural fermentation in water at 30°C per 24 hours, washed and dried to 15% water content and pre- soaked in water for six days; and 9) fruit seeds cherry pulped in a manual pulper and mucilated by natural fermentation in water at 30ºC for 24 hours, washed and dried up to 15%, without parchment and pre- soaked in water for six days.
Perforated polyethylene bags were used in the dimensions of 11 x 22 cm, and standard substrate (CFSMG, 1999) consisting of earth, manure, simple superphosphate and potassium chloride.
After purging the substrate with methyl bromide (GUIMARÃES & MENDES, 1998) and the preparation of the bags, proceeded to direct seeding, by sowing two seeds or one fruit per bag, the which were covered with two centimeters of substrate.
It is observed by the percentage data of emergence, that seedlings originating from unripe fruits were statistically lower and the other treatments showed no significant differences for this evaluation. These treatments differed only by the speed with which the seeds emerged from the ground.
The best physiological performance of seeds no parchment was found in all evaluations seedling development.
Another fact observed in this study was the performance of seedlings originated from fruits at the stage cane green, which were statistically equal to the best treatment (seeds without parchment), in almost all assessments (Table 2).
Type | Journal Article |
---|---|
Author | Ednamar Gabriela Palú |
Author | Adriano Bortolotti Da Silva |
Author | Moacir Pasqual |
URL | https://www.researchgate.net/publication/237031115_INDUCAO_DE_BROTACOES_IN_VITRO_EM_SEGMENTOS_NODAIS_DE_Coffea_arabica_L |
Volume | 9 |
Issue | 2 |
Pages | 361–369 |
Publication | Ensaios e Ciência: Ciências Biológicas, Agrárias e da Saúde |
ISSN | 1415-6938 |
Date | 2005 |
Extra | 00000 Publisher: Kroton Educacional SA |
Library Catalog | Google Scholar |
Language | por |
Abstract | Coffee is one of the most important products on the international market, and through conventional methods, the techniques for improving this species require a relatively long time. This and the resources spent are the limiting factors for obtaining cultivars in a relatively short period. Given this fact, in vitro vegetative multiplication appears as a viable and short-term alternative for solving these problems. The present work aimed to study the shoot induction in nodal segments, observing the influence of the apical bud, the number of buds and inoculation position of the explant of Coffea arabica L. (Catura, Catuaí and Icatu). The explants were from pre-established in vitro plants. For that, we used the culture medium “MS” (MURASHIGE; SKOOG, 1962) supplemented with 3 mg.L -1 of GA 3 + 6 mg.L -1 of BAP. The experiments were incubated in growth rooms at a temperature of 25 ± 1 o C and a photoperiod of 16 hours, under 35 μmol.m -2 .s -1 photosynthetic photon flux. It was concluded that the use of explants without the apical bud, with three pairs of lateral buds and inoculated in the vertical position, favored the shoots in the nodal segments in the tested Coffea arabica L. cultivars. |
Date Added | 10/11/2021, 2:30:37 AM |
Modified | 10/20/2021, 7:18:34 PM |
Type | Journal Article |
---|---|
Author | Mohammed Ibrahim |
Author | Taye Kufa |
Author | Kifle Belachew |
URL | https://www.iiste.org/Journals/index.php/JNSR/article/view/21493 |
Volume | 5 |
Issue | 7 |
Publication | Growth |
ISSN | 2225-0921 |
Date | 2015 |
Extra | 00000 |
Library Catalog | Google Scholar |
Abstract | The use of an appropriate transplanting techniques and polythene bags (pot sizes) for cultivars vary from place to place due to lack of information based technology. Therefore, there is a need to determine area specific transplanting techniques for available cultivars. Accordingly, an experiment was conducted to evaluate the growth response of Coffee arabica cultivars to transplanting methods at Bonga South Western Ethiopia, in 2012/2013 cropping season. The first set of experiment encompasses two experiment factors that were two transplanting methods (bare rooted and ball rooted) and six (Coffea arabica L.) cultivars (75227, 741, 7440, Dessu, 74110 and 74112); their factorial combination was tested using randomized complete block design with three replications. Bare root transplanting methods significantly(p<0.05) increase seedling vigor indices at first true leaf, leaf area index (LAI), internodes length, plant height and root volume (RV) and total biomass (TDW) at early growth stage of Arabica coffee seedlings, however it showed lower survival percentage (52.20% ) after field transplanting. On the other hand, Seedling growth parameters; number of leaf, LAI, plant height, stem girth, root volume and TDW were significantly (p<0.05) influenced by arabica coffee genotypes. TDW increases from 2.65 g and 2.65 g/ seedling to 3.51 g and 3.50 g /seedling for 75227 and 741 open Arabica cultivars, respectively, however, open Arabica coffee cultivar (741) was revealed lower field survival percentage (48.83% ) after field transplanting. Generally, coffee seedling grown under ball rooted transplanting methods were found under good growth performance (93.06% ) after field transplanting. Therefore, among the studied Arabica coffee cultivars 7410, 74112, Dessue and 75227 could be recommended to be raised on ball rooted transplanting methods as an agronomical feasible choice for the study area. |
Date Added | 10/11/2021, 2:30:37 AM |
Modified | 10/18/2021, 11:03:45 PM |
Type | Thesis |
---|---|
Author | Alex Gustavo Pacheco Bustos |
URL | https://hdl.handle.net/20.500.11811/2714 |
Date | 2007 |
Extra | 00000 Publisher: Universitäts-und Landesbibliothek Bonn |
Library Catalog | Google Scholar |
Language | en |
University | Rheinische Friedrich-Wilhelms-Universität Bonn |
Abstract | Over 30 million coffee growers all over the world face starvation due to low international coffee prices. The impact is very acute in Latin America, which accounts nearly 65% of world coffee production. The current crisis seems to be shaped by changes in consumer preferences as well as low production phenomenon due to caffeine accumulation in coffee plantation soils as a result of decades of monoculture. To turn the present crisis around, a successful strategy for agricultural diversification is required. In response to the crisis, some coffee growers have begun to diversify their coffee plantations with intercalated cultivations of aromatic plants. Herbs are profitable crops and adaptable to the environmental conditions of coffee regions. Due to the complexity of the natural interaction under intercropped systems and the potential allelopathic effects between coffee and aromatic herbs, some questions need to be clarified before this alternative production system can be recommended to growers. Accumulation of caffeine in a soluble form in the soil is regarded as one reason for “low production” and degeneration by auto toxicity of coffee plantations. The use of aromatic species with the ability to take-up and accumulate caffeine may be a way to diminish the toxic levels of this alkaloid and increase coffee production. In this present study, the potential uptake of caffeine by spearmint (Mentha piperita L.), basil (Ocimum basilicum L.), sage (Salvia officinalis L.), and oregano (Origanum vulgare L.) and the allelopathic effects of these herbs on physiological parameters in coffee (Coffea arabica L.) were investigated. Two ecological conditions in rural area of Puebla State, Mexico (2004-2005), as well as laboratory bioassays in Bonn, Germany (2006) were evaluated, to validate the hypothesis that intercropping herbs in coffee production systems is a possibility to attenuate the coffee crisis while positively stimulating coffee plant growth and cup quality, diminishing caffeine content in the soil. To summarize the results: 1. Intercropping sage, spearmint, basil and oregano stimulate the plagiotropic growth of Coffea arabica plants most effectively in young production systems by still unknown mechanisms. 2. Volatiles from essential oils induce stomata opening in coffee leaves, which may have a positive influence on the CO2 fixation and increase of photosynthetic activity when no limiting factors are present. 3. Aromatic species, principally sage and oregano absorb caffeine and can contribute to a diminishing of the caffeine contamination of the soil. 4. Cup quality is improved with spearmint, basil and sage as intercrops, but mechanisms of action are unknown and further research remains to be done. 5. Finally coffee growers can stabilize their income situation and their social condition by offering aromatic plants to the local markets produced during the no-harvest period of coffee (April –November) in between coffee rows. |
# of Pages | 112 |
Date Added | 10/11/2021, 2:30:37 AM |
Modified | 10/18/2021, 8:22:38 PM |
Type | Thesis |
---|---|
Author | Maria de Lourdes Resende |
URL | http://www.sbicafe.ufv.br/handle/123456789/6660 |
Place | Lavras, Minas Gerais, Brasil |
Date | 2006 |
Extra | 00000 Publisher: Universidade Federal de Lavras |
Library Catalog | Google Scholar |
Language | Portuguese |
University | Universidade Federal de Lavras |
Abstract | Coffee propagation is performed through seedlings from seeds. However, germination in coffee seed is slow and uneven. Therefore, this work had the objective of studding the physiological aspects of seed germination in Coffea arabica cv. Rubi. There were evaluated effect of light, gibberellins and paclobutrazol (inhibitor of gibberellins biosynthesis) during seed germination. Seeds after treatment with light, gibberellins and paclobutrazol were subjected to electrophoresis analysis of proteins resistant to heat( LEA proteins) and the enzymes (catalase, superoxide dismutase and peroxidase), determination of sugar content (sucrose, mannose, glucose, fructose, galactose, raffinose and staquiose), the activity of endo-b-mannanase, the enzyme polyphenoloxidase and percentage of polyphenols in each time of imbibition. The speed of seed germination was inhibited in seeds treated with gibberellins. The paclobutrazol decreased speed of seed germination did not decrease the effect of light. Higher speed of germination was observed under absence of light. Regarding the patterns of isoenzymes and proteins there were changes during seed germination. Sucrose and mannose act during seed germination. The enzyme end-b-mannanase increased its activity in seeds imbibed under the presence of light and gibberellins. The enzyme polyphenoloxidase decreased its activity whereas polyphenols increased during germination. |
# of Pages | 119 |
Date Added | 10/11/2021, 2:30:37 AM |
Modified | 10/18/2021, 8:26:14 PM |
Type | Conference Paper |
---|---|
Author | André Barretto Pereira |
Author | Lílian de Sousa Ribeiro |
Author | Moacir Pasqual |
Author | Anna Lygia de Rezende Maciel |
Author | Antônio Nazareno Guimarães Mendes |
Author | Erivelton Resende |
Author | Fábio Pereira Dias |
URL | http://tot.dti.ufv.br/handle/123456789/546 |
Pages | 5 |
Date | 2000 |
Extra | 00000 |
Library Catalog | Google Scholar |
Conference Name | Simpósio de Pesquisa dos Cafés do Brasil |
Abstract | It is possible to propagate Coffea arabica L. hybrids in commercial scale through rooting of cuttings. The objective was to verify the rooting of cuttings of three Coffea arabica L. cultivars, in five substrates. Herbaceous cuttings from orthotropics branches, with one bud, two leaves reduced to 1/3 of its size and 8-10 cm length, from Mundo Novo, Catuaí and Icatú cultivars, were planted in sand, earthworm humus, residual coffee machine processing, standard substrate (utilized in seed germination of coffee) and commercial substrate. The statistical design was randomized blocks, in 5 x 3 factorial scheme, with 3 replications and 6 cuttings per plot. Survival cuttings, sprout number, sprout length, dry weight matter of the aerial part, cuttings rooted, roots number and dry weight matter of the roots were the parameters evaluated. Best results were registered when sand, earthworm humus, residual coffee machine processing and the standard substrate were used. Catuaí and Icatú shower better rooting than Mundo Novo. |
Proceedings Title | Agroclimatologia |
Date Added | 10/11/2021, 2:30:37 AM |
Modified | 10/20/2021, 4:20:18 PM |
Type | Journal Article |
---|---|
Author | Anna Lygia de Rezende Maciel |
Author | Filipe Almendagna Rodrigues |
Author | Moacir Pasqual |
Author | Carlos Henrique Siqueira de Carvalho |
Volume | 10 |
Issue | 2 |
Pages | 169–175 |
Publication | Australian Journal of Crop Science |
Date | 2016 |
Extra | 00000 |
DOI | 10.3316/INFORMIT.030798745715401 |
Library Catalog | Google Scholar |
Abstract | Brazil is the first producer and second consumer of coffee in the world. Besides, coffee production also provides a million direct and indirect jobs throughout the supply chain. To increase productivity and reduce cost in conventional tissue cultures the temporary immersion of somatic embryos in bioreactor system was employed. During this process acclimatization is the key problem to obtain high-quality seedlings that required high cost. Therefore, the aim of this study was to evaluate the efficiency of the acclimatization process of coffee somaclones (Coffea racemosa x Coffea arabica) derived from somatic embryogenesis immersed temporarily in bioreactor system (RITA). Embryos derived from leaves of the 'Siriema 05' cultivar coffee (Coffea racemosa x Coffea arabica) were used in this experiment. The acclimatization stage of cotyledon embryos was realized in three experiments: Experiment 1 - Different substrates and size of cotyledon embryos; Experiment 2 - Different substrates and Stimulate concentrations; Experiment 3 - Growth of seedlings in different substrates and Osmocote concentrations. A higher conversion percentage of cotyledonary embryos into seedlings were obtained from embryos grown in the Plantmax medium with vermiculite and Plantmax substrate. Moreover, increasing concentrations of Stimulate and Osmocote to a substrate concentration of 10.9 g L-1 produced better quality seedlings. |
Date Added | 10/11/2021, 2:32:39 AM |
Modified | 10/18/2021, 8:19:31 PM |
Type | Book Section |
---|---|
Author | RG FERRÃO |
Author | PS VOLPI |
Author | MAG FERRÃO |
Author | A. F. A. da FONSECA |
Author | AC VERDIN FILHO |
URL | https://biblioteca.incaper.es.gov.br/digital/bitstream/123456789/3540/1/chapter-04-origin-geographical-dispersion-taxonomy-genetic-diversity.pdf |
Series | The Coffea canephora produced in Brazil |
Edition | 3 |
Publisher | Incaper |
Pages | 87-111 |
ISBN | 978-85-89274-32-6 |
Date | 2019 |
Extra | 00000 Publisher: In: FERRÃO, RG; FONSECA, AFA da.; FERRÃO, MAG; DE MUNER, LH (Ed.). Conilon … |
Library Catalog | Google Scholar |
Language | en |
Abstract | The coffee tree is an Eudicotyledoneae plant, class of Angiosperms, Rubiaceae Family and belonging to the genus Coffea (CARVALHO, 1946; BRIDSON, 1987), which has 124 species cataloged in the literature (DAVIS et al., 2011). Of these, only Coffea arabica and Coffea canephora have significant economic importance. The other species, such as Coffea liberica, Coffea racemosa, Coffea dewevrei, Coffea eugenoides, Coffea congensis, Coffea stenophylla, among others, have fundamental importance in genetic breeding programs. They are used in hybridization and transfer of genes and alleles responsible for desirable agronomic characteristics (mainly related to the drought tolerance and resistance to pests and diseases) for the two species commercially produced (CARVALHO, 1946; KRUG; CARVALHO, 1951). The coffee (Coffea sp.) is from the African continent, being C. arabica from the southwest of Ethiopia, Southeast of Sudan and northern of Kenya, and C. canephora from a wide area that extends from India to Congo, from the west coast to the central region of the continent, predominantly in regions of low altitude and higher temperatures (CONAGIN; MENDES, 1961). Currently, the arabica coffee is grown in many parts of the world: in Central and South America, Africa and East Asia; and the coffee worldwide known as robusta coffee, C. canephora, is grown in West and Central Africa, southeast Asia and in some regions of the Americas, with emphasis for Brazil (ECCARDI; SANDALJ, 2002). This latter species, widely geographic distributed, is adapted to the hot and humid regions, and in low areas of rainforest (CHARRIER; BERTHAUD, 1985). In Brazil, it is grown in regions with lower altitude and higher temperature, with an annual average between 22 o to 26 o C. C. canephora is the second most cultivated species of the genus in the world, representing approximately 38% of production, and Espírito Santo stands as the greatest Brazilian producer of this species, designated in the State as conilon coffee. In this chapter, it discourses on an updated review about the origin, geographical dispersion, taxonomy and genetic diversity of the species C. canephora. |
Book Title | Conilon Coffee |
Date Added | 10/11/2021, 2:32:39 AM |
Modified | 10/20/2021, 5:47:09 PM |
Type | Thesis |
---|---|
Author | Juliana Costa de Rezende |
URL | http://www.sbicafe.ufv.br/bitstream/handle/123456789/6654/Tese_Juliana%20Costa%20de%20Rezende.pdf |
Place | Lavras, Minas Gerais, Brasil |
Date | 2008 |
Extra | 00000 Publisher: Universidade Federal de Lavras |
Library Catalog | Google Scholar |
University | Universidade Federal de Lavras |
Abstract | This work was carried out with the objective of obtaining high effectiveness in indirect somatic embryogenesis in foliar explants of Coffea arabica elite clones. The elite clones embryogenic calli yield potential was evaluated in different media as well as in 2,4-D and 2-iP variations in both primary and secondary media described by Teixeira et al (2004). For the calli multiplication the treatments constituted of two media (stage two medium described by Albarran et al, 2004, and multiplication medium described by Teixeira et al, 2004) and two cultivation systems (solid and liquid). Evaluations were carried out 21, 42 and 63 days after the experiment has been installed, by calli weighing. After the somatic embryos transformation the effect of both IBA and BAP in growth medium (PRM) described by Teixeira et al (2004) was evaluated. Plants produced through somatic embryogenesis were compared, under field conditions, with those originated from seeds. Results show that somatic embryos productions depend on the genotype. Calli induction depends on both the time explants were collected and the 2-iP and 2,4-D relationship. The solid system was more effective in the embryogenic calli multiplication of the clone studied. Taking into account the percentage of both normal and rooted plantlets as well as the aerial part length average values no IBA or BAP addition is needed, in the protocol used, to convert somatic embryos into plantlets. The length of lateral branches of the plants originated from somatic embryogenesis was longer when compared to those originated from seeds. As to the other characteristics evaluated no significant difference was found. No change in the fenotype of plants originated from somatic embryogenesis was noticed by visual inspection. Therefore, the Coffea arabica plants originated from somatic embryogenesis were found to behave similarly to those originated from seeds. |
# of Pages | 103 |
Date Added | 10/11/2021, 2:32:39 AM |
Modified | 10/19/2021, 1:27:27 AM |
Type | Journal Article |
---|---|
Author | Jesús E. de A. Bojórquez-Quintal |
Author | Lucila A. Sánchez-Cach |
Author | Ángela Ku-González |
Author | Cesar de los Santos-Briones |
Author | María de Fátima Medina-Lara |
Author | Ileana Echevarría-Machado |
Author | José A. Muñoz-Sánchez |
Author | S. M. Teresa Hernández Sotomayor |
Author | Manuel Martínez Estévez |
URL | https://www.sciencedirect.com/science/article/pii/S016201341400035X |
Volume | 134 |
Pages | 39-48 |
Publication | Journal of Inorganic Biochemistry |
ISSN | 0162-0134 |
Date | May 1, 2014 |
Extra | 00000 |
Journal Abbr | Journal of Inorganic Biochemistry |
DOI | 10.1016/j.jinorgbio.2014.01.018 |
Accessed | 10/13/2021, 3:38:51 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | Coffea arabica is a woody species that grows in acid soils, where aluminum is available and may affect growth and productivity. To determine the effect of aluminum on primary root growth of C. arabica cv. Typica, seedlings were exposed over 30days to different concentrations of AlCl3 (0, 100, 300 and 500μM) in vitro. The aluminum effect on primary root growth was dose-dependent: low aluminum concentrations (100 and 300μM) stimulated primary root growth (6.98±0.15 and 6.45±0.17cm, respectively) compared to the control (0μM; 5.24±0.17cm), while high concentrations (500μM) induced damage to the root tips and inhibition of primary root growth (2.96±0.28cm). Aluminum (100μM) also increased the K and Ca contents around 33% and 35% in the coffee roots. It is possible that aluminum toxicity resides in its association with cell nuclei in the meristematic region of the root. Additionally, after 30days of treatment with aluminum, two different effects could be observed on phospholipase C (PLC) activity. In shoots, aluminum concentrations ≥300μM inhibited more than 50% of PLC activity. In contrast, in roots a contrasting behavior was determined: low (100μM) and toxic concentrations (500μM) increased the activity of PLC (100%). These results suggest the possible involvement of the phosphoinositide signal transduction pathway, with the phospholipase C enzyme participating in the beneficial and toxic effects of aluminum in plants. |
Date Added | 10/13/2021, 3:38:51 PM |
Modified | 10/13/2021, 3:38:53 PM |
Type | Journal Article |
---|---|
Author | L. D. Martins |
Author | L. De Souza Machado |
Author | M. A. Tomaz |
Author | JFT do Amaral |
URL | https://www.ajol.info/index.php/ajb/article/view/115761 |
Rights | Copyright (c) |
Volume | 14 |
Issue | 9 |
Pages | 728-734 |
Publication | African Journal of Biotechnology |
ISSN | 1684-5315 |
Date | 2015 |
Extra | 00027 Number: 9 |
DOI | 10.4314/ajb.v14i9 |
Accessed | 10/13/2021, 3:39:06 PM |
Library Catalog | www.ajol.info |
Language | en |
Abstract | Reduced soil fertility has been surpassed by the supply of mineral nutrients, which results in increased rates of plant production and costs. In this context, the optimization of plants’ nutritional efficiency is critical to increase productivity and reduce the cost of agricultural production systems. The nutritional efficiency of plants is conditioned by numerous factors and the growing environment. Therefore, the knowledge of genetic basis and mode of inheritance can assist in selecting genotypes with desirable agronomic characteristics coupled with nutritional efficiency and genetic variability. The trend of expanding agricultural frontiers has increased interest in the use of genotypes with the potential to adapt to adverse conditions of soil fertility. Within crops, the coffee beans are the second most traded commodity in the world. In this sense, optimization of nutritional efficiency of the coffee has a positive impact on the sum of efforts to make sustainable activity. This review aimed to present a systematic analysis of the nutritional efficiency of the coffee. Key words: Nutrient absorption and utilization, root length, genetic variability. |
Date Added | 10/13/2021, 3:39:06 PM |
Modified | 10/13/2021, 3:39:07 PM |
Type | Journal Article |
---|---|
Author | Bruno Galvêas Laviola |
Author | Hermínia Emilia Prieto Martinez |
Author | Aldo Luiz Mauri |
URL | http://www.scielo.br/j/cagro/a/sx7nPG8NCxwmhMnGSpyknns/abstract/?lang=pt |
Volume | 31 |
Pages | 1043-1047 |
Publication | Ciência e Agrotecnologia |
ISSN | 1413-7054, 1981-1829 |
Date | 2007-08 |
Extra | 00000 Publisher: Editora da UFLA |
Journal Abbr | Ciênc. agrotec. |
DOI | 10.1590/S1413-70542007000400015 |
Accessed | 10/13/2021, 3:39:47 PM |
Library Catalog | SciELO |
Language | pt |
Abstract | Objetivou-se neste trabalho avaliar o desenvolvimento de mudas de quatro cultivares de cafeeiro arábico, originadas de sementes de plantas submetidas aos níveis de adubação baixo, adequado e alto, em sistema hidropônico com argila expandida. Utilizou-se, para este experimento, sementes de quatro cultivares de cafeeiro arábico (Catuaí, Rubi, Icatu e Acaiá), submetidos a três níveis de adubação. Os níveis baixo e alto de adubação receberam, respectivamente, 0,4 e 1,4 vezes a recomendação feita para o nível adequado. Após a coleta e preparo, as sementes foram germinadas em papel "germitest" e depois de 30 dias foram transplantadas para tubetes de 120 ml preenchidos com substrato comercial. O sistema hidropônico empregado foi de subirrigação com argila expandida (cinasita) onde foram fixados os tubetes. Utilizou-se ainda o delineamento de blocos casualizados em esquema fatorial 4 X 3 com 4 repetições e 7 plantas úteis por parcela. Assim que as plantas atingiram 5 a 6 pares de folhas foi medida a altura de plantas, o peso de matéria seca das folhas, caule e sistema radicular. Os resultados obtidos foram submetidos à análise de variância e as médias comparadas pelo teste de Duncan. Observou-se que o nível de adubação das plantas matrizes pouco influenciou no crescimento e desenvolvimento das mudas de cafeeiro, no sistema hidropônico. O sistema hidropônico proposto promoveu bom desenvolvimento das respectivas mudas de cafeeiro. |
Date Added | 10/13/2021, 3:39:47 PM |
Modified | 10/13/2021, 3:39:48 PM |
Type | Journal Article |
---|---|
Author | João Paulo Felicori Carvalho |
Author | Gladyston Rodrigues Carvalho |
Author | André Dominghetti Ferreira |
Author | Juliana Costa de Rezende |
Author | Rodrigo Elias Batista de Almeida Dias |
Author | Alex Mendonça de Carvalho |
URL | http://www.coffeescience.ufla.br/index.php/Coffeescience/article/view/809 |
Rights | Copyright (c) 2020 Coffee Science |
Volume | 10 |
Issue | 2 |
Pages | 176-183 |
Publication | Coffee Science - ISSN 1984-3909 |
ISSN | 1984-3909 |
Date | 2015-05-30 |
Extra | 00000 Number: 2 |
Accessed | 10/13/2021, 3:40:51 PM |
Library Catalog | www.coffeescience.ufla.br |
Language | pt |
Abstract | The cultivate Apoatã 2258 (Coffea canephora) has been used as a rootstock cultivar of Coffea arabica. However, due to the wide availability of genetic resources found in different regions of the country, there is a vast field to be explored in the research of new genotypes to be used as rootstock. The choice of these materials should be based in combination with the graft and adaptation to the ecosystem where it is inserted.Thus, this study aimed at evaluating the efficiency of absorption, translocation and use of macronutrients in genotypes of C. canephora, to determine their potential of use as rootstocks. Two experiments were carried out in a period of five months in a greenhouse, using the process of hydroponics, growing in pots containing nutrient solution. In the experiment 1 (E1) , treatments included five C. canephora genotypes (Apoatã IAC3598-3B, Apoatã IAC3597-1A, Apoatã IAC3599-2A-1A, Apoatã IAC3598 and Apoatã IAC3597-9B) and two C. arabica cultivars (Palma II and Oeiras), used as rootstock. In experiment 2 (E2), the five C. canephora genotypes described, were cultivated on two types of seedlings (ungrafted and self grafted). Experimental design was factorial (5x2) and it was used the random block design, with five replicates. The genotypes Apoatã IAC3597-1A and Apoatã IAC3597-9B provide higher average uptake, translocation and nutrient use efficiency and they can be considered suitable choices for use as rootstocks. |
Date Added | 10/13/2021, 3:40:51 PM |
Modified | 10/13/2021, 3:40:52 PM |
Type | Journal Article |
---|---|
Author | Arley José Fonseca |
Author | Ana Flávia de Freitas |
Author | Gladyston Rodrigues Carvalho |
Author | Marco Aurélio Carbone Carneiro |
Author | Diego Júnior Martins Vilela |
Author | Larissa de Oliveira Fassio |
URL | http://www.scielo.br/j/cagro/a/n6wBrxJ8fynKQdprHcpwjkx/?format=html&lang=en |
Volume | 43 |
Publication | Ciência e Agrotecnologia |
ISSN | 1413-7054, 1981-1829 |
Date | 2019-08-12 |
Extra | 00000 Publisher: Editora da UFLA |
Journal Abbr | Ciênc. agrotec. |
DOI | 10.1590/1413-7054201943006919 |
Accessed | 10/13/2021, 4:00:01 PM |
Library Catalog | SciELO |
Language | en |
Abstract | The benefits of mycorrhization occur with the growth of hyphae in colonized roots by promoting an increase of the contact surface which improves the initial growth due to a better absorption of water and nutrients. The objective was to evaluate the effect of arbuscular mycorrhizal fungus Rhizophagus clarus inoculation over the initial development and nutritional response of six genotypes of Coffea arabica L. Six genotypes of Coffea arabica L. were used (MGS Aranas, H29-1-8-5, Red Catuai IAC 144, IPR 100, Catigua MG2, Paraíso H 419-1) and with arbuscular mycorrhizal fungus - AMF: Rhizophagus clarus and without the application of the fungus. For the production of coffee seedlings, seeds were placed to germinate in plastic trays with sterile sand. After germination, 10 seedlings of each genotype were transferred to 0.120 dm3 polyethylene tubes with substrate. Then the inoculation of five seedlings of each genotype with the AMF R. Clarus was performed. When the seedlings with and without inoculation with the AMF presented six pairs of leaves they were transplanted to 13-liter pots containing soil (Dystrophic red-yellow latosol). The inoculation favored the initial growth of the coffee plants and its intensity varied according to the genotypes. The genotypes H 29-1-8-5, Red Catuai IAC 144 and Catigua MG 2 were the ones that presented higher shoot dry mass, root dry mass, total dry mass and accumulation of P, in relation to MGS aranãs, Paraiso H 419-1 and IPR 100, so they are the most promising to be inoculated with the arbuscular mycorrhizal fungus. |
Date Added | 10/13/2021, 4:00:01 PM |
Modified | 10/18/2021, 9:21:08 PM |
Extracted Annotations (10/15/2021, 11:53:18 PM)
"South and 44° 58' 05.51" West, altitude of 875 meters. relative humidity of 60%." (p. 2)
"Randomized Design (CRD), in a 6 x 2 factorial scheme.a arabica L. (MGS Aranas, H 29-1-8-5, Red Catuai IAC144, IPR 100, Catigua MG2, Paraiso H 419-1) in F6 generation) (Table 1) and with AMF: Rhizophagus clarus and without the inoculation of the fungus (control), with five repetitions and a plant per experimental unit." (p. 2)
"For multiplication of AMF, it was used a substrate composed of soil (Dystrophic Red Latosol) and sand in the ratio of 1:1 (v:v). The substrate was autoclaved to 120 °C, for 60 minutes, and this process repeated by completing 24 hours for sterilization. After 20 days, three-liter pots were filled with substrate and seeded with Brachiaria decumbens, inoculated with spores of R. clarus." (p. 2)
"For the production of coffee seedlings, seeds were ceded in the experimental field of the EPAMIG in geographic coordinates 21° 40' 58.61" South and 45° 56' 23.87" West, altitude of 791 meters, then placed to germinate in plastic trays with sterile sand. To reach the match stage "76 days after sowing", they were transferred to 0.120 dm3 polyethylene tubes with charred pine bark substrate and vermiculite average expanded Vida Verde® (Tristão; Andrade; Silveira, 2006)." (p. 3)
"o; Andrade; Silveira, 2006).lings of each genotype were transferred from the trays with sand to the tubes. Then, we proceeded to the inoculation with AMF R. clarus. We applied, 10 g soil inoculum containing spores, hyphae and colonized roots, with each seedling receiving the equivalent to 240 spores. The seedlings remained in the tubes for six months. During this period, the fertilization was done with slow-release fertilizer "osmocote Plus" 15-09-12, at a dose of 8 g per dm3." (p. 3)
"50 and 300 days, was influenced by the inoculation with AMF.igure 1) showed an increase of 11.6% in relation to the control (non-inoculated seedlings)." (p. 4)
"of 11.6% in relation to the control (non-inoculatede seedlings). t of the aerial part for plants inoculated with AMF R. clarus (Figure 1) was 9.5% in relation to the control." (p. 4)
"inoculation with AMF and was dependent on the genotypes. the cultivars Red Catuai IAC 144, IPR 100 and Catigua MG 2, inoculated with R. clarus (Table 3), there was an increase of 88.5; 99.2 and 35.4% respectively, as compared to the non-inoculated plants (control)." (p. 4)
"ctively, as compared to the non-inoculated plants (control).9-1-8-5, Red Catuai IAC 144, IPR 100 and Catigua MG 2, inoculated with R." (p. 4)
"clarus (Table 2), there was an increase of 45.9; 53.5; 48.4; 66.8 and 39.3% in relation to the non-inoculated plants (control)." (p. 5)
"For leaf area, the cultivars Red Catuai IAC 144, IPR 100 and Catigua MG 2 inoculated with the fungus showed an increase compared to the control plants, with a minimum increase of 53.5%." (p. 5)
"nd this effect was dependent on the cultivars (Table 4). Red Catuai IAC 144, IPR 100, Catigua MG 2 and the progeny H 29-1-8-5 inoculated with the AMFR. clarus (Table 3) showed an increase of 93.4; 149.3; 79.8 and 58.2% respectively, as compared to the non-inoculated plants (control)." (p. 6)
"ots presented the influence of colonization with AMF on 2 and progeny H 29-1-8-5 (Table 3). In these genotypes inoculated with AMF R. clarus, the increase was of 360.6; 158.3; 317.0 and 244.3% respectively, as compared with the non-inoculated plants (control)." (p. 6)
"The six cultivars inoculated with FMA had higher colonization in the plants compared to the control. The plants showed on average a colonization ranging from 34 to 62% and there was no colonization in control treatments." (p. 7)
"The accumulation of N in the shoot of plants of cultivars Red Catuai IAC 144, IPR 100, Catigua MG 2 and progeny H 29-1-8-5 with the AMF R. clarus was respectively of 55.4; 197.5; 75.8 and 52.3% superior to the control (Table 5)." (p. 7)
"There was an accumulation of P in plants of varieties IPR 100, Catigua MG2 and progeny H 29-1-8-5 and when inoculated with the AMF (Table 5), showed an increase of 61.9; 70.6 and 45.5% respectively, compared to the control (Table 5)." (p. 8)
"The R. clarus presented an increase of 26.7 % for the content of K, in relation to the control (Brito et al., 2017) as found in this work." (p. 8)
"Coffee plants with and without inoculation of AMF showed no visual symptoms of nutrient deficiency." (p. 8)
"So it is clear the direct benefits of arbuscular mycorrhizal fungi in coffee plants in the absorption of nutrients from the soil, reflecting on their growth." (p. 8)
"ulated with the AMF, among the six genotypes studied. were inoculated with the mycorrhizal fungus Rhizophagus clarus, it showed gains in relation to the non-inoculated plants." (p. 9)
Type | Journal Article |
---|---|
Author | Herminia Emilia Prieto Martinez |
Author | José Soares de Lacerda |
Author | Junia Maria Clemente |
Author | Jaime Barros da Silva Filho |
Author | Adriene Woods Pedrosa |
Author | Ricardo Henrique Silva Santos |
Author | Paulo Roberto Cecon |
URL | http://www.scielo.br/j/pab/a/ttTJQ6MTTg57LWGRGGRypck/abstract/?lang=en |
Volume | 53 |
Pages | 443-452 |
Publication | Pesquisa Agropecuária Brasileira |
ISSN | 0100-204X, 1678-3921 |
Date | 2018-04 |
Extra | 00000 Publisher: Embrapa Secretaria de Pesquisa e Desenvolvimento, Pesquisa Agropecuária Brasileira |
Journal Abbr | Pesq. agropec. bras. |
DOI | 10.1590/S0100-204X2018000400006 |
Accessed | 10/13/2021, 4:02:58 PM |
Library Catalog | SciELO |
Language | en |
Abstract | Abstract: The objective of this work was to evaluate the effect of copper on the chemical composition of coffee beans and on the quality of the beverage, relating both of them to the Cu leaf contents in coffee (Coffea arabica) plants. Coffee plants were grown in a hydroponic system containing 0.2, 0.4, 0.8, 1.6, and 3.2 μmol L-1 Cu until fruit setting. Coffee bean production was evaluated, and, after the cherries were dried, the following characteristics were determined: leaf Cu content; total titratable acidity; color index; electrical conductivity; leached K; polyphenol oxidase (PPO) activity; concentrations of caffeine, trigonelline, organic acids, total phenols, chlorogenic acids (3-CQA, 4-CQA, and 5-CQA), sucrose, glucose, arabinose, mannose, and galactose; and sensory quality of roasted beans. Cu increased bean yield, PPO activity, and the concentrations of organic acids, 3-CQA, sucrose, and arabinose. Total titratable acidity, total phenols, 4-CQA, and 5-CQA were reduced with increasing Cu doses. Leaf contents related to the maximum and minimum values of desirable and undesirable quality attributes ranged from 5.6 to 11.4 mg kg-1 Cu, respectively. Copper affects the production and chemical composition of coffee beans, and the attributes related to quality are maximized in plants with low leaf contents of the nutrient. |
Date Added | 10/13/2021, 4:02:58 PM |
Modified | 10/13/2021, 4:02:59 PM |
Type | Journal Article |
---|---|
Author | Prakaimas Roonprapant |
Author | Anuruck Arunyanark |
Author | Cattleya Chutteang |
URL | https://li01.tci-thaijo.org/index.php/anres/article/view/251804 |
Rights | Copyright (c) |
Volume | 55 |
Issue | 3 |
Pages | 473-484 |
Publication | Agriculture and Natural Resources |
ISSN | 2452-316X |
Date | 2021-06-30 |
Extra | 00000 Number: 3 |
Accessed | 10/13/2021, 4:03:25 PM |
Library Catalog | li01.tci-thaijo.org |
Language | en |
Abstract | Drought causes crop yield losses and inhibits growth in coffee plants. The morphophysiological responses were investigated of Thai robusta coffee genotypes under water deficit. The seedlings of six robusta coffee genotypes, five local Thai genotypes (SC05, PP01, PP05, SKE06 and TPO17) and a water deficit-tolerant genotype (FRT141) were evaluated under a hydroponics system that simulated water deficit stress using polyethylene glycol (PEG). Morphophysiological parameters were collected 2 wk after stress. The water deficit significantly reduced the mean (± SD) relative water content from 95.3 ± 3.0% in the control to 67.2 ± 6.9% in the stress condition. The mean total leaf water potential was -1.4 ± 0.4 MPa and -0.2 ± 0.1 MPa for the stressed and control plants, respectively. The stressed plants showed significantly decreased stomatal conductance, along with a lower transpiration rate (70–90%) and photochemical efficiency of photosystem II (PSII; 50–80%), which directly affected the net rate of photosynthesis that was almost zero. The number of leaves, total leaf area and total biomass greatly declined after stress. There were significant differences among genotypes. FRT141 had the highest mean number of leaves (29.8 ± 9.0 leaves/plant), total leaf area (912 ± 90 cm2/plant) and total biomass (10.7 ± 2.4 g/plant) under water deficit, indicating that FRT141 was the most tolerant genotype under stress, followed by PP01 and SC05, respectively, while SKE06 and TPO17 were the most sensitive genotypes, respectively, with mean values of 1.3 ± 1.0–2.0 ± 2.0 leaves/plant, 34 ± 28–50 ± 45 cm2/plant and 4.4 ± 2.6–3.1±1.2 g/plant. Furthermore, the tolerant genotypes showed fewer physiological changes, specifically less reduction in the light-adapted quantum efficiency of PSII, electron transport rate and maximum quantum efficiency and less increase in electrolyte leakage in root andleaf cells. |
Date Added | 10/13/2021, 4:03:25 PM |
Modified | 10/13/2021, 4:03:26 PM |
Type | Journal Article |
---|---|
Author | Paulo Mazzafera |
URL | http://www.scielo.br/j/brag/a/Pk6MX8Ww7njGh458c4VfM3m/?format=html&lang=en |
Volume | 58 |
Pages | 387-391 |
Publication | Bragantia |
ISSN | 0006-8705, 1678-4499 |
Date | 1999 |
Extra | 00000 Publisher: Instituto Agronômico de Campinas |
Journal Abbr | Bragantia |
DOI | 10.1590/S0006-87051999000200018 |
Accessed | 10/13/2021, 4:03:52 PM |
Library Catalog | SciELO |
Language | en |
Abstract | The effect of nutrient supply on the caffeine content of coffee (Coffea arabica L.) leaves was investigated. Seeds were germinated in nutrient-agar media lacking N, P, K, Ca, Mg, S, Zn, B or Mo. The control treatment contained all essential nutrients. The caffeine concentration was determined seven months after seed sowing when the seedlings have 3 to 4 pair of leaves. The omission of K induced the highest caffeine content in the leaves (24.5 g.kg-1). Caffeine in the control treatment was 21.9 g.kg -1. Absence of P induced the lowest content, 17.5 g.kg-1. |
Date Added | 10/13/2021, 4:03:52 PM |
Modified | 10/13/2021, 4:03:52 PM |
Type | Journal Article |
---|---|
Author | Fábio M Da Matta |
Author | Moacyr Maestri |
Author | Paulo R Mosquim |
Author | Raimundo S Barros |
URL | https://www.sciencedirect.com/science/article/pii/S0168945297001428 |
Volume | 128 |
Issue | 1 |
Pages | 43-50 |
Publication | Plant Science |
ISSN | 0168-9452 |
Date | September 30, 1997 |
Extra | 00000 |
Journal Abbr | Plant Science |
DOI | 10.1016/S0168-9452(97)00142-8 |
Accessed | 10/13/2021, 4:15:54 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | Photosynthetic and biochemical responses of potted plants of Coffea arabica cv Red Catuaı́ and C. canephora cv Kouillou were examined during winter and summer. There were large decreases in the photosynthetic rates of both cultivars from summer to winter, with more pronounced declines shown by Catuaı́. The photochemical efficiency of photosystem II, as evaluated by the ratio of variable to maximum chlorophyll fluorescence, decreased to a greater extent in Catuaı́ than in Kouillou during winter. This probably was a secondary effect due to the loss of the photosynthetic capacity, which was mostly determined by non-stomatal factors. In response to winter conditions, Kouillou accumulated three times more proline and ascorbate with no changes in the content of malonedialdehyde (MDA). Catuaı́ accumulated 160% more proline and 206% more MDA in winter in comparison to summer values, but there was no significant change in ascorbate levels. The content of chlorophylls and carotenoids did not change in response to natural seasonal acclimation. The leaf starch content in winter was higher by 53% in Catuaı́ than in Kouillou. Photosynthetic rates, as measured by oxygen evolution, were well correlated with starch content in Catuaı́, but not in Kouillou. When winter-grown leaves were darkened for 96 h, their normal starch levels were halved; this was accompanied by the restoration of the photosynthetic rates to levels similar to those found in summer in both cultivars, with a concurrent resumption of the photosystem II efficiency. |
Date Added | 10/13/2021, 4:15:54 PM |
Modified | 10/13/2021, 4:15:55 PM |
Type | Journal Article |
---|---|
Author | Stéphane Dussert |
Author | Julien Serret |
Author | Aldecinei Bastos-Siqueira |
Author | Fabienne Morcillo |
Author | Eveline Déchamp |
Author | Valérie Rofidal |
Author | Philippe Lashermes |
Author | Hervé Etienne |
Author | Thierry JOët |
URL | https://doi.org/10.1093/jxb/erx492 |
Volume | 69 |
Issue | 7 |
Pages | 1583-1597 |
Publication | Journal of Experimental Botany |
ISSN | 0022-0957 |
Date | March 24, 2018 |
Extra | 00000 |
Journal Abbr | Journal of Experimental Botany |
DOI | 10.1093/jxb/erx492 |
Accessed | 10/13/2021, 4:16:46 PM |
Library Catalog | Silverchair |
Abstract | The ‘intermediate seed’ category was defined in the early 1990s using coffee (Coffea arabica) as a model. In contrast to orthodox seeds, intermediate seeds cannot survive complete drying, which is a major constraint for seed storage and has implications for both biodiversity conservation and agricultural purposes. However, intermediate seeds are considerably more tolerant to drying than recalcitrant seeds, which are highly sensitive to desiccation. To gain insight into the mechanisms governing such differences, changes in desiccation tolerance (DT), hormone contents, and the transcriptome were analysed in developing coffee seeds. Acquisition of DT coincided with a dramatic transcriptional switch characterised by the repression of primary metabolism, photosynthesis, and respiration, and the up-regulation of genes coding for late-embryogenesis abundant (LEA) proteins, heat-shock proteins (HSPs), and antioxidant enzymes. Analysis of the heat-stable proteome in mature coffee seeds confirmed the accumulation of LEA proteins identified at the transcript level. Transcriptome analysis also suggested a major role for ABA and for the transcription factors CaHSFA9, CaDREB2G, CaANAC029, CaPLATZ, and CaDOG-like in DT acquisition. The ability of CaHSFA9 and CaDREB2G to trigger HSP gene transcription was validated by Agrobacterium-mediated transformation of coffee somatic embryos. |
Date Added | 10/13/2021, 4:16:46 PM |
Modified | 10/13/2021, 4:16:46 PM |
Extracted Annotations (10/19/2021, 6:56:45 PM)
"For germination capacity and DT assays, one pool of 300 seeds was collected at 10-d intervals from 140 to 260 d after flowering (DAF), as described above." (p. 1585)
"For DT measurement, batches of 50 seeds were desiccated for 20 d at 25 °C in the dark over saturated solutions of KOH (9% RH), K acetate (23% RH), MgCl2 (32% RH), K2CO3 (45% RH), NH4NO3 (62% RH), or (NH4)2SO4 (81% RH)." (p. 1585)
"3 4 3 4 2 4- bility, zygotic embryo extraction, in vitro culture and viability were then assessed as described in Dussert et al. (2006)." (p. 1585)
"DT measurement, somatic embryos (SE) were desiccated for 6 h at 25 °C in the dark over saturated solutions of (NH4)2SO4 (81% RH), KCl (85% RH), KNO3 (92% RH), or K2SO4 (97% RH)." (p. 1585)
"Between 150 and 190 DAF, almost all seeds acquired the capacity to be dried in 62% RH and half of them also became tolerant to drying in 23% RH (Fig. 1B)." (p. 1586)
"The level of DT of mature coffee seeds was thus mostly gained between 150 and 190 DAF, which corresponds to the transition between stages 5 and 6 according to the anatomic and metabolic criteria defined in previous studies, in which seven stages are distinguished during seed development" (p. 1586)
"These seven developmental stages can be briefly described as follows (Fig. 1D): from stage 1 to stage 2, the perisperm undergoes significant growth, which determines the final size of the seed; at stage 3, the endosperm develops rapidly and replaces the perisperm in the locule; endosperm growth ends by stage 4 and oil starts to accumulate; stage 5 is characterised by endosperm hardening due to the massive deposition of galactomannans in cell walls; accumulation of reserves ends by stage 6, as illustrated by the transcription pattern of three genes representative of oil (OLE-1), protein (SSP1), and galactomannan (ManS1) storage (Fig. 1D), when the pericarp of the fruit turns yellow; finally, fruit and seed maturity is completed at stage 7, when the pericarp becomes red." (p. 1586)
"DT is therefore acquired without dehydration in planta in developing coffee seeds." (p. 1593)
"Transcriptome analysis of developing coffee seeds revealed the existence of a major transcriptional switch coinciding with DT acquisition." (p. 1593)
"The period that we define as the late maturation stage in coffee seeds starts with this transcriptional switch at the stage 5-6 transition." (p. 1593)
Type | Journal Article |
---|---|
Author | Daniela de Carvalho Lopes |
Author | Antonio José Steidle Neto |
URL | https://www.sciencedirect.com/science/article/pii/S0022474X20300758 |
Volume | 88 |
Pages | 101669 |
Publication | Journal of Stored Products Research |
ISSN | 0022-474X |
Date | September 1, 2020 |
Extra | 00000 |
Journal Abbr | Journal of Stored Products Research |
DOI | 10.1016/j.jspr.2020.101669 |
Accessed | 10/13/2021, 4:17:11 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | Coffee is an important agricultural commodity worldwide. Its quality is influenced by several factors that can damage kernels, changing the product composition, flavor, appearance, and causing weight loss. Mathematical models for estimating the dry matter loss of coffee were not found in scientific literature. This study deals with the calibration and validation of a model for predicting the dry matter loss of coffee beans under different storage times, temperatures and moisture contents. For this, green parchment grain of Coffea arabica (cv Catuaí Vermelho) were used. Measured dry matter losses varied from 0 to 1.2% and the proposed model was accurate when comparing experimental and predicted data (99.8%). Mean bias, absolute and relative errors were −0.001%, 0.026% and 13.6%, respectively, while the root mean square error was 0.066%, evidencing low scattering and high precision. The estimated maximum allowable storage times of coffee beans, based on a 0.5 dry matter loss threshold, varied from 9 years (for temperature and moisture content of 15 °C and 14% d.b.) to 2 days (for temperature and moisture content of 35 °C and 22% d.b.). The proposed model can be easily implemented in computer programs, appearing as an important tool when simulating the drying or aeration processes, as well as for helping in decision making for coffee storage and trading. |
Date Added | 10/13/2021, 4:17:11 PM |
Modified | 10/13/2021, 4:17:11 PM |
Extracted Annotations (10/15/2021, 6:18:31 PM)
"Dry matter loss also has been successfully used for determining the maximum allowable storage time for grain and seed (Silva, 2018; Al-Yahya, 2001), which depends on a variety of quality thresholds and modifies according to grain type, storage conditions and product processing." (p. 101669)
"As expected, dry matter loss increased with the storage time and was stronger for high temperatures and moisture contents." (p. 101672)
"Temperature and moisture content are the two main variables affecting dry matter loss, since respiration of grain bulks is likely to be dominated by the actions of microorganisms attacking the beans." (p. 101672)
"As other stored commodities, coffee grain may become infested infield or at the processing plant, during transport or storage if adequate postharvest practices are not followed." (p. 101672)
"For coffee beans with water activity of 0.55 (11% d.b.) dry" (p. 101673)
"matter losses varied from 0 to 0.005%, while for samples with water activities of 0.65 (14% d.b.) and 0.75 (16% d.b.) the maximum dry matter losses were 0.12 and 1.0%, respectively." (p. 101673)
"When coffee was stored at safe moisture content (14% d.b.), estimated maximum allowable storage times were 1, 3 and 9 years (12, 36 and 103 months) for temperatures of 35, 25 and 15C, respectively." (p. 101673)
"The storage of coffee with moisture content of 11% d.b. resulted in maximum allowable storage times of 12, 4 and 1.4 years for temperatures of 15, 25 and 35C, respectively." (p. 101673)
"These results indicate that coffee deterioration tends to be faster as temperature and moisture content increase, when compared to soybean and wheat." (p. 101673)
"Additionally, green coffee transportation from the producers to the consuming locations tends to involve a period of enforcedstorage,whichmayreachmanyweeks." (p. 101674)
Type | Journal Article |
---|---|
Author | Dinorah M. S. Marçal |
Author | Rodrigo T. Avila |
Author | Luisa F. Quiroga-Rojas |
Author | Raylla P. B. de Souza |
Author | Carlos C. Gomes Junior |
Author | Lucas R. Ponte |
Author | Marcela L. Barbosa |
Author | Leonardo A. Oliveira |
Author | Samuel C. V. Martins |
Author | José D. C. Ramalho |
Author | Fábio M. DaMatta |
URL | https://www.sciencedirect.com/science/article/pii/S0981942820306021 |
Volume | 158 |
Pages | 524-535 |
Publication | Plant Physiology and Biochemistry |
ISSN | 0981-9428 |
Date | January 1, 2021 |
Extra | 00000 |
Journal Abbr | Plant Physiology and Biochemistry |
DOI | 10.1016/j.plaphy.2020.11.042 |
Accessed | 10/13/2021, 4:17:25 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | Despite being evolved in shaded environments, most coffee (Coffea arabica L.) is cultivated worldwide under sparse shade or at full sunlight. Coffee is ranked as greatly responsive to climate change (CC), and shading has been considered an important management strategy for mitigating the harmful CC outcomes on the crop. However, there is no information on the effects of enhanced [CO2] (eCa) on coffee performance in response to light availability. Here, we examined how carbon assimilation and use are affected by eCa in combination with contrasting light levels. For that, greenhouse-grown plants were submitted to varying light levels (16 or 7.5 mol photons m−2 day−1) and [CO2] (ca. 380 or 740 μmol mol−1 air) over six months. We demonstrated that both high light and eCa improved growth and photosynthetic performance, independently. Despite marginal alterations in biomass partitioning, some allometric changes, such as higher root biomass-to-total leaf area and lower leaf area ratio under the combination of eCa and high light were found. Stimulation of photosynthetic rates by eCa occurred with no direct effect on stomatal and mesophyll conductances, and no signs of photosynthetic down-regulation were found irrespective of treatments. Particularly at high light, eCa led to decreases in both photorespiration rates and oxidative pressure. Overall, our novel findings suggest that eCa could tandemly act with shading to mitigate the harmful CC effects on coffee sustainability. |
Date Added | 10/13/2021, 4:17:25 PM |
Modified | 10/13/2021, 4:17:26 PM |
Type | Journal Article |
---|---|
Author | Fábio M. DaMatta |
Author | Alice G. Godoy |
Author | Paulo E. Menezes-Silva |
Author | Samuel C.V. Martins |
Author | Lílian M.V.P. Sanglard |
Author | Leandro E. Morais |
Author | André Torre-Neto |
Author | Raquel Ghini |
URL | https://doi.org/10.1093/jxb/erv463 |
Volume | 67 |
Issue | 1 |
Pages | 341-352 |
Publication | Journal of Experimental Botany |
ISSN | 0022-0957 |
Date | January 1, 2016 |
Extra | 00000 |
Journal Abbr | Journal of Experimental Botany |
DOI | 10.1093/jxb/erv463 |
Accessed | 10/13/2021, 4:18:03 PM |
Library Catalog | Silverchair |
Abstract | Coffee (Coffea spp.), a globally traded commodity, is a slow-growing tropical tree species that displays an improved photosynthetic performance when grown under elevated atmospheric CO2 concentrations ([CO2]). To investigate the mechanisms underlying this response, two commercial coffee cultivars (Catuaí and Obatã) were grown using the first free-air CO2 enrichment (FACE) facility in Latin America. Measurements were conducted in two contrasting growth seasons, which were characterized by the high (February) and low (August) sink demand. Elevated [CO2] led to increases in net photosynthetic rates (A) in parallel with decreased photorespiration rates, with no photochemical limitations to A. The stimulation of A by elevated CO2 supply was more prominent in August (56% on average) than in February (40% on average). Overall, the stomatal and mesophyll conductances, as well as the leaf nitrogen and phosphorus concentrations, were unresponsive to the treatments. Photosynthesis was strongly limited by diffusional constraints, particularly at the stomata level, and this pattern was little, if at all, affected by elevated [CO2]. Relative to February, starch pools (but not soluble sugars) increased remarkably (>500%) in August, with no detectable alteration in the maximum carboxylation capacity estimated on a chloroplast [CO2] basis. Upregulation of A by elevated [CO2] took place with no signs of photosynthetic downregulation, even during the period of low sink demand, when acclimation would be expected to be greatest. |
Short Title | Sustained enhancement of photosynthesis in coffee trees grown under free-air CO2 enrichment conditions |
Date Added | 10/13/2021, 4:18:03 PM |
Modified | 10/13/2021, 4:18:03 PM |
Type | Journal Article |
---|---|
Author | S. Ratanamarno |
Author | S. Surbkar |
URL | http://www.mijst.mju.ac.th/vol11/211-218.pdf |
Volume | 11 |
Issue | 3 |
Pages | 211-218 |
Publication | Maejo International Journal of Science and Technology |
ISSN | 1905-7873 |
Date | September 1, 2017 |
Extra | 00000 |
Journal Abbr | Maejo International Journal of Science and Technology |
Library Catalog | ResearchGate |
Abstract | Caffeine and some catechins in coffee leaves were preliminarily investigated. To make coffee leaf tea, coffee leaves were roasted for 6 min. at 100±10°C and then rolled by hand. Young leaves were roasted again at 100±10°C for 1 hr and 15 min. or until the leaves were dry and crispy. For mature leaves, they were roasted further for 1 hr without rolling. To make fermented coffee leaf tea, both fresh young and mature leaves were crumbled and fermented for 8 hr and then roasted. Caffeine and catechins were determined by HPLC. The following results were obtained for fresh coffee leaves: caffeine, 1.8-3.2 mg/g; epigallocatechin gallate, 5.5-16.4 mg/g; epicatechin gallate, 0.26-0.48 mg/g; epicatechin, 0.27-0.40 mg/g; and catechin, 0.05-0.18 mg/g. The amounts of caffeine and catechins were found to be higher in young leaves than in mature leaves. For coffee leaf tea, a steeping time of at least 5 min. was suggested. It was also found that most of the phenolics were lower in fermented leaves than in non-fermented leaves. © 2017 by Maejo University, San Sai, Chiang Mai, 50290 Thailand. |
Date Added | 10/13/2021, 4:19:38 PM |
Modified | 10/20/2021, 7:20:27 PM |
Type | Journal Article |
---|---|
Author | Helbert Rezende de Oliveira Silveira |
Author | Meline De Oliveira Santos |
Author | Jose Donizeti Alves |
Author | Kamila Rezende Dázio de Souza |
Author | Cinthia Aparecida Andrade |
Author | Raphaella Gomes Martins Alves |
URL | http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/17557 |
Volume | 36 |
Issue | 2 |
Pages | 211 |
Publication | Acta Scientiarum. Agronomy |
ISSN | 1807-8621, 1679-9275 |
Date | 2014-04-29 |
Extra | 00000 |
Journal Abbr | Acta Sci. Agron. |
DOI | 10.4025/actasciagron.v36i2.17557 |
Accessed | 10/13/2021, 4:20:01 PM |
Library Catalog | DOI.org (Crossref) |
Language | en |
Abstract | The objective of the present study was to evaluate the interference of water excess in soil on the growth of young coffee plants of the Mundo Novo and Catuaí cultivars.Plants were subjected to the following three different substrate water availability conditions: control (wellwatered), continuous substrate waterlogged, and intermittent substrate waterlogged. Several growthrelated traits were evaluated over the course of 19 weeks. Based on the number and quality of the affected variables from all forms of analyses, the Catuaí cultivar showed greater sensitivity to waterlogging. Both cultivars exhibited growth inhibition in response to substrate waterlogging stress, which was exacerbated by premature leaf dropping. |
Date Added | 10/13/2021, 4:20:01 PM |
Modified | 10/16/2021, 2:50:56 PM |
Extracted Annotations (10/16/2021, 3:00:19 PM)
"Seedlings from Mundo Novo IAC 379-19 and Red Catuaí IAC 44 cultivars in the stage known as orelha de onça were provided by Foundation Procafé, Varginha Experimental Farm, and they were transferred to a nursery covered with black shading screens (for 30% shade)." (p. 212)
"After they developed four screens (for 30% shade). d leaves, they were transplanted to perforated black polyethylene bags with dimensions of 15 x 25 cm (diameter x height) and a volume of 4.4 L. The substrate was made from 700 L of sieved subsoil, 300 L of sieved cattle manure, and 5 kg of simple superphosphate and 0.5 kg of potassium chloride (GUIMARÃES et al., 2002)." (p. 212)
"After the development of eight pairs of fully expanded leaves, the seedlings were subjected to the following three different conditions of water availability in the substrate: (a) seedlings maintained with substrate moisture close to field capacity (FC), which were monitored by the direct method proposed by Souza et al. (2002); (b) continuous waterlogging of the substrate (CW), where the seedlings were placed in buckets with a permanent layer of water covering two-thirds of the height of the polyethylene bag; and (c) intermittent waterlogging of the substrate (IW), where the plants alternately remained for three days under continuous waterlogging and for four days under field capacity throughout the experimental period." (p. 212)
"Waterlogged soil inhibited coffee seedling growth, and this inhibition was proportional to waterlogging intensity in that seedlings under CW were more affected than those under either IW or FC." (p. 213)
"Analysis of the dry leaves, stems and roots from both cultivars revealed that until the second month, there were no significant differences between the treatments (Figure 6)." (p. 215)
"After the end of the stress period, the seedlings of both varieties were left at FC, and after 30 days all of them had recovered their growth and were able to produce new release leaves (data not shown)." (p. 216)
"These results show that seedlings were able to grow reasonably well for a period of 19 weeks under IW even though the growth occurred at lower rates than those of the control." (p. 216)
"Under this condition of CRAWFORD, 2004). reated for this study by suspending irrigation for three days after a similar period of waterlogging (IW), the roots had sufficient oxygen to maintain aerobic respiration (VOESENEK et al., 2006)." (p. 216)
"ing a hypoxic environmentm experiences hypoxia, it redirects its respiration to become anaerobic and consequently has a drop of up to 18 times the production of adenosine triphosphate (ATP) as aerobic respiration, ATP being essential for plant growth and development (LIAO; LIN, 1995)." (p. 216)
"It is possible that the smaller leaf area of these plants compromised the production of carbohydrates and thus the recovery of energy, even for the seedlings under IW conditions." (p. 217)
"This finding means that the Catuaí cultivar felt the harmful effects of waterlogging a few days before the Mundo Novo." (p. 217)
"When comparing the variation in shoot and root dry mass from control seedlings with those that were under stress for five months, one realizes that the roots, followed by the leaves, were most affected." (p. 217)
"death of fibrous roots after seedlings showed a good ability to tolerate waterlogged soil, as both varieties recovered after a period of time when the soil was at field capacity." (p. 217)
"The growth and development of Mundo Novo and Catuaí seedlings were affected by substrate waterlogging after 19 weeks of stress. Under these conditions they were unable to increase their dry mass to the same proportion of those that were at field capacity." (p. 217)
Type | Conference Paper |
---|---|
Author | José Cochicho Ramalho |
Author | Ana P Rodrigues |
Author | Isabel P Pais |
Author | António E Leitão |
Author | Ana I Ribeiro |
Author | Maria José Silva |
Author | M Manuela Chaves |
Author | Fernando C Lidon |
URL | https://www.researchgate.net/publication/286376474_Maintenance_of_respiration_activity_and_sugar_balance_account_for_chilling_tolerance_in_Coffea_sp |
Pages | 5 |
Date | 2010 |
Library Catalog | Zotero |
Conference Name | XII Congresso Latino-Americano de Fisiologia Vegetal |
Language | en |
Abstract | Low temperature is a major limiting factor for plant metabolism and is often associated to a reduction in crop production, especially in tropical and sub-tropical plants. Low-positive temperatures (chilling) can impair cell metabolism, with strong impacts on membranes and respiratory and photosynthetic machinery. Nevertheless, the exposure to low-positive temperatures during a rather long period may promote the acclimation of plants through a wide range of potential mechanisms, involving complex morphological, metabolic and ultrastructural changes (Hällgreen and Öquist, 1990; Kratsch and Wise, 2000). In fact, some acclimation is possible even in chilling-sensitive plants (Krause, 1994). The maintenance of the production and consumption of sugars, as well as the stabilization of its levels are of upmost importance to cold tolerance (Byrd et al., 1995; Leegood, 1995; Allen and Ort, 2001; Ramalho et al., 2003). In fact, despite some transient changes and imbalances, in the long-term, the restoration of the balance between photosynthesis, carbon metabolism and translocation is essential for a lower cold sensitivity (Hurry et al., 1998). Low temperature stress is of particular importance for coffee crop, since it is known that Coffea arabica and C. canephora species (responsible for ca. 99% of world coffee production) are sensitive to low non-freezing temperatures that often occur in production areas, with a depressing effect on growth, photosynthetic performance and yields (Bauer et al., 1985; Da Matta et al., 1997). Searching for important insights concerning the acclimation ability of Coffea sp., the impact of cold on sugar contents and respiration enzymes was analysed. |
Date Added | 10/13/2021, 4:20:25 PM |
Modified | 10/20/2021, 4:04:17 PM |
Type | Journal Article |
---|---|
Author | Marcelo F. Pompelli |
Author | Gilmara M. Pompelli |
Author | Antônio F. M. de Oliveira |
Author | Werner C. Antunes |
Author | 1 Plant Physiology Lab, Department of Botany, Federal University of Pernambuco, CCB, Recife, Pernambuco, 50670901, Brazil; |
URL | http://www.aimspress.com/article/10.3934/environsci.2013.1.1 |
Volume | 1 |
Issue | 1 |
Pages | 1-11 |
Publication | AIMS Environmental Science |
ISSN | 2372-0352 |
Date | 2013 |
DOI | 10.3934/environsci.2013.1.1 |
Accessed | 10/13/2021, 4:20:26 PM |
Library Catalog | DOI.org (Crossref) |
Language | en |
Abstract | Caffeine is the most abundant and important purine alkaloid derived from several important crop, such as coffee, tea, cocoa, guarana, and other plants. In tea and coffee plants, caffeine is predominantly produced in the young buds of leaves and in immature fruits. The effect of light-stimulating caffeine biosynthesis is uncertain, but our results clearly show that light, independent of N-availability, increases caffeine (26%), allantoin (47%), and theophylline (8%) content in plants compared with those grown in a shaded (50% solar irradiation) environment. Caffeine is the major low-molecular-weight nitrogenous compound in coffee plants, and at times, it functions as a chemical defense for new bud leaves. Therefore, the primary question that remains is whether caffeine can serve as a nitrogen source for other metabolic pathways. If so, plants grown under a low nitrogen concentration should promote caffeine degradation, with the consequent use of nitrogen atoms (e.g., in NH3) for the construction of other nitrogen compounds that are used for the plant’s metabolism. Our results provide strong evidence that caffeine is degraded into allantoin at low rates in N-deficient plants but not in N-enriched ones. By contrast, this degradation may represent a significant N-source in N-deficient plants. |
Date Added | 10/13/2021, 4:20:26 PM |
Modified | 10/13/2021, 4:20:26 PM |
Type | Journal Article |
---|---|
Author | Lima Filho |
Author | O F de |
URL | https://www.scielo.br/j/bjb/a/Nq89rhdbYC3g3DMWcKmxNqs/?lang=en |
Volume | 63 |
Issue | 3 |
Pages | 481-490 |
Publication | Braz. J. Biol. |
Date | 2003 |
Extra | 00000 |
DOI | 10.1590/s1519-69842003000300014 |
Library Catalog | Zotero |
Language | en |
Abstract | Remobilization and re-utilization of 15N and 85Rb labelled nitrogen and potassium reserves for new growth and fruit formation was studied under greenhouse conditions using both normal and deficient young coffee plants. It was found that K reserves are used in higher proportion than is stored N by fruits and other organs. The export of N by organs of residence in the normal plants obeyed the following proportions of the total: leaves 47%-58%, branches and flower buds 21%-27%, roots 21%-32%. The corresponding figures in the case of deficient plants were: leaves 49%-65%, branches and flower buds 21%-27%, roots 14%-25%. Re-utilization of K took place in the following proportions in the normal plants: leaves 54%-64%, branches and flower buds 20%-21%, roots 30%-41%. In K deficient plants the figures were: leaves 62%-79%, branches and flower buds 1.2%-4.4%, roots 20%-33%. In tissues formed after the initiation of flowering buds, the demand for N is met by reserves as follows: normal plants: fruits 20.6%-24.8%, leaves 15.6%-19.4%, twigs 19%-20.5%; deficient plants: fruits 43.5%-48.5%, leaves 48.1%-51.9%, twigs 46%-53%. The K needs for new tissues are met in the order: normal plants: fruits 40%-45.8%, leaves 27%-37.6%, twigs 26%-33.1%; deficient plants: fruits 65.7%81.5%, leaves 52.6%-68.4%, twigs 62%-86.1%. Fruits represent the main sink for both N and K. Reutilization of both elements is higher in the case of deficient plants. |
Date Added | 10/13/2021, 4:20:27 PM |
Modified | 10/20/2021, 7:04:03 PM |
Type | Journal Article |
---|---|
Author | M. A. Tomaz |
Author | S. R. Silva |
Author | N. S. Sakiyama |
Author | H. E. P. Martinez |
URL | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832003000500013&lng=pt&tlng=pt |
Volume | 27 |
Issue | 5 |
Pages | 885-892 |
Publication | Revista Brasileira de Ciência do Solo |
ISSN | 0100-0683 |
Date | 10/2003 |
Extra | 00000 |
Journal Abbr | Rev. Bras. Ciênc. Solo |
DOI | 10.1590/S0100-06832003000500013 |
Accessed | 10/13/2021, 4:20:29 PM |
Library Catalog | DOI.org (Crossref) |
Language | pt |
Abstract | O estudo da eficiência nutricional de plantas enxertadas de cafeeiro é importante para a seleção de combinações enxerto/porta-enxerto, visando ao desenvolvimento e produção máximos. O presente trabalho teve como objetivo avaliar, em cultivo hidropônico, a eficiência de absorção, translocação e uso de Ca, Mg e S por mudas enxertadas de Coffea arabica L., influenciada pelo porta-enxerto. O experimento foi realizado em casa de vegetação por um período de 170 dias, em vasos que continham areia, como substrato, e solução nutritiva circulante. Utilizaram-se, como enxerto, quatro genótipos de Coffea arabica L.: as variedades Catuaí Vermelho IAC 15 e Oeiras MG 6851 e as linhagens H 419-10-3-1-5 e H 514-5-5-3, e, como porta-enxerto, três genótipos de C. canephora Pierre et Froenher: Apoatã LC 2258, Conillon Muriaé-1, Robustão Capixaba (EMCAPA 8141) e um genótipo de Coffea arabica L.: Mundo Novo IAC 376-4, além da utilização de quatro pés-francos. Utilizou-se o delineamento experimental de blocos casualizados com quatro repetições. Os contrastes entre médias compararam as mudas de pé-franco com as associações enxerto/porta-enxerto. A eficiência de absorção, translocação e uso de Ca, Mg e S por mudas enxertadas de cafeeiro variou de acordo com a combinação enxerto/porta-enxerto. Somente a eficiência de translocação de Ca não foi alterada pela combinação enxerto/porta-enxerto. A linhagem H 514-5-5-3 foi beneficiada na eficiência de uso de Mg e produção de matéria seca pelos porta-enxertos Mundo Novo IAC 376-4 e Apoatã LC 2258, e na eficiência de uso de Ca e S apenas pelo Mundo Novo IAC 376-4. , Studies into the nutritional efficiency of grafted coffee plants is essential for the selection of graft/rootstock combinations for a maximum development and production. Our objective was the evaluation of the influence of rootstocks on the efficiency of uptake, translocation and use of Ca, Mg, and S in young Coffee arabica L. plants in hydroponic cultivation. The experiment was conducted in a greenhouse and lasted 170 days, using sand as substratum and circulating nutritive solution. Four genotypes of Coffea arabica L. were utilized as grafts: varieties Catuaí Vermelho IAC 15 and Oeiras MG 6851, and lines H 419-10-3-1-5 and H 514-5-5-3. Four non-grafted plants and four rootstocks, which comprised three genotypes of Coffea canephora Pierre et Froenher (Apoatã LC 2258, Conillon Muriaé-1, and Robustão Capixaba (EMCAPA 8141)) and one genotype of Coffea arabica L. (Mundo Novo IAC 376-4), were also studied. The experimental layout was a randomized block design with four replicates. Means of the non-grafted plants and graft/rootstock combinations were compared. The efficiency of uptake, translocation and use of Ca, Mg and S in the young coffee plants varied with the graft/rootstock combinations. Only the translocation efficiency of Ca was not altered by the graft/rootstock combination. Rootstocks Apoatã LC 2258 and Mundo Novo IAC 376-4 brought forth an enhanced use efficiency of Mg and dry matter yield in line H 514-5-5-3, and Mundo Novo IAC 376-4 an improved use efficiency of Ca and S |
Date Added | 10/13/2021, 4:20:29 PM |
Modified | 10/13/2021, 4:20:29 PM |
Type | Journal Article |
---|---|
Author | S G Tesfaye |
Author | M R Ismail |
Author | M F Ramlan |
Author | M Marziah |
Author | H Kausar |
Author | M A Hakim |
URL | http://www.jeb.co.in/index.php?page=abstract&issue=201509_sep15&number=28 |
Volume | 36 |
Issue | 5 |
Pages | 1239-1245 |
Publication | Journal of Environmental Biology |
ISSN | 2394-0379 |
Date | 2015 |
Extra | 00000 |
Library Catalog | Zotero |
Language | en |
Abstract | Drought stress is one of the major bottle necks of growth and productivity of Robusta coffee (Coffea canephora pierre ex froehner) in many producing areas the crop. An experiment was carried out to determine the difference among known Robusta coffee clones for rate of vegetative growth and dry matter production and partitioning under water deficit stress condition and to identify drought tolerant materials. Twelve-month-old seedlings of six Robusta coffee clones (IC-2, IC-3, IC-4, IC-6, IC-8 and R-4) were subjected to two irrigation treatments: well-watered control and water-stressed by withholding irrigation for 3 weeks in a rain shelter. Growth response to soil drying and dry matter distribution among plant parts were measured to identify drought tolerant clones. Leaf growth of all the coffee clones was considerably affected by soil drying. There were significant differences noted between clones for the rate of reduction in leaf elongation, total leaf area, specific leaf area (SLA) and dry matter yield under water stress condition. Moreover, rate of survival of coffee plants during drought and recovery upon re-watering at the end of the soil drying period significantly varied with clone. Some of the clones, particularly IC-3 and IC-6, exhibited higher root: shoot ratio (0.493 – 0.613) and total leaf area (900 – 920cm2) and lower SLA (82 – 83 cm2/g) and rate of leaf fall (62 – 71%) than the other clones (with the respective values of 0.413 – 0.447, 160 – 440cm2, 92 – 97 cm2/g, 82 – 92%) under water-stressed condition. These clones (86 – 88%) survived stress and produced new leaves and flowers more rapidly after re-watering than R-4 (37%) and IC-8 (53%). Hence, clones IC-6 and IC-3 exhibited better performances and seemed to be less sensitive to water deficit stress. Drought tolerance attributes in these clones could be linked to some morphological modifications, mainly increased root: shoot ratio and reduced SLA. |
Date Added | 10/13/2021, 4:20:31 PM |
Modified | 10/20/2021, 7:24:23 PM |
Type | Journal Article |
---|---|
Author | Manuel de Feria |
Author | Elio Jiménez |
Author | Raúl Barbón |
Author | Alina Capote |
Author | Maité Chávez |
Author | Elisa Quiala |
URL | https://doi.org/10.1023/A:1021202305692 |
Volume | 72 |
Issue | 1 |
Pages | 1-6 |
Publication | Plant Cell, Tissue and Organ Culture |
ISSN | 1573-5044 |
Date | 2003-01-01 |
Extra | 00000 |
Journal Abbr | Plant Cell, Tissue and Organ Culture |
DOI | 10.1023/A:1021202305692 |
Accessed | 10/13/2021, 4:21:22 PM |
Library Catalog | Springer Link |
Language | en |
Abstract | The effect of two different dissolved oxygen (DO) concentrations (50 and 80%) on differentiation of somatic embryos (SE) from cell suspensions of coffee (Coffea arabica cv. Catimor 9722) was analyzed. Two bioreactors CMF-100 (CHEMAP AG) designed for the culture of cells, with 2-l glass vessels and a maximum work volume of 1.8 l were used. Each one was equipped with a gas blending unit (air, O2, N2, CO2) for the control of DO concentration. The inoculation density of embryogenic cells was 1.0 gram of fresh weight per liter (g FW l−1). The number of somatic embryos was greater (71 072 SE l−1) with 80% DO, but the major proportion were globular and heart shaped SE (66 399 SE l−1) and only 6.6% with regard to total was torpedo shaped SE. However, the 50% DO produced the higher number in the torpedo shaped SE (7389 SE l−1) what represented 20.0% with regard to total. Thus, higher concentrations of DO induced globular and heart shaped SE differentiation, but for production of torpedo shaped SE lower concentrations DO are needed. The somatic embryos obtained in the bioreactor with 50% DO showed similar behavior to the somatic embryos obtained in the rotary shaker. After 8 weeks of culture, 49.2% germination was obtained, which allowed a total of 1725 plantlet to be transferred to conditions ex vitro. After 6 months of culture, 89.2% of conversion was achieved and 1539 plants obtained were transferred to field conditions. |
Date Added | 10/13/2021, 4:21:23 PM |
Modified | 10/13/2021, 4:21:23 PM |
Type | Journal Article |
---|---|
Author | Éva Brigitta Patay |
Author | Tímea Bencsik |
Author | Nóra Papp |
URL | https://www.sciencedirect.com/science/article/pii/S1995764516304680 |
Volume | 9 |
Issue | 12 |
Pages | 1127-1135 |
Publication | Asian Pacific Journal of Tropical Medicine |
ISSN | 1995-7645 |
Date | December 1, 2016 |
Extra | 00000 |
Journal Abbr | Asian Pacific Journal of Tropical Medicine |
DOI | 10.1016/j.apjtm.2016.11.008 |
Accessed | 10/13/2021, 4:21:46 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | Coffea (coffee) species are grown in almost all countries along the Equator. Many members of the genus have a large production history and an important role both in the global market and researches. Seeds (Coffeae semen) are successfully used in food, cosmetic, and pharmaceutical industries due to its caffeine and high polyphenol content. Nowadays, the three best-known coffee species are Arabic (Coffea arabica L.), Robusta (Coffea robusta L. Linden), and Liberian coffees (Coffea liberica Hiern.). Even though, many records are available on coffee in scientific literature, wild coffee species like Bengal coffee (Coffea benghalensis Roxb. Ex Schult.) could offer many new opportunities and challenges for phytochemical and medical studies. In this comprehensive summary, we focused on the ethnomedicinal, phytochemical, and medical significance of coffee species up to the present. |
Date Added | 10/13/2021, 4:21:46 PM |
Modified | 10/13/2021, 4:21:46 PM |
Type | Journal Article |
---|---|
Author | M.G.R. Cannell |
URL | https://doi.org/10.1080/00221589.1971.11514406 |
Volume | 46 |
Issue | 3 |
Pages | 263-272 |
Publication | Journal of Horticultural Science |
ISSN | 0022-1589 |
Date | January 1, 1971 |
Extra | 00000 Publisher: Taylor & Francis _eprint: https://doi.org/10.1080/00221589.1971.11514406 |
DOI | 10.1080/00221589.1971.11514406 |
Accessed | 10/13/2021, 4:23:11 PM |
Library Catalog | Taylor and Francis+NEJM |
Abstract | The rate of dark respiration, at 30 °C, of newly-detached developing coffee fruits, fruit pericarps and seeds is described in relation to their increase in size and dry weight (d.w.). The fruits took up 2 ml O2/g d.w./hr when they started to swell 6–8 weeks after flowering. Between 9 and 17 weeks the fruits expanded rapidly, seed endosperms were formed, and individual fruit d.w. increased to about 200 mg. Oxygen uptake per gram d.w. decreased to 0.5 ml 02/hr, while uptake per fruit increased to about 90μl O2/hr. From 17 weeks after flowering until ripening, at about 30 weeks, the fruits swelled relatively little but increased in d.w. to about 500 mg. Although the respiratory activity of the pericarp and seed tissues decreased greatly, oxygen uptake per fruit remained unchanged (about 90 μl O2/hr). During and after fruit ripening the pericarp increased in size and d.w. and respired more rapidly than before.Changes in the carbohydrate demands of developing coffee fruits are discussed. |
Date Added | 10/13/2021, 4:23:11 PM |
Modified | 10/13/2021, 4:23:11 PM |
Type | Journal Article |
---|---|
Author | Solange Aparecida Ságio |
Author | André Almeida Lima |
Author | Horllys Gomes Barreto |
Author | Carlos Henrique Siqueira de Carvalho |
Author | Luciano Vilela Paiva |
Author | Antonio Chalfun-Junior |
URL | https://doi.org/10.1007/s11738-013-1342-6 |
Volume | 35 |
Issue | 11 |
Pages | 3091-3098 |
Publication | Acta Physiologiae Plantarum |
ISSN | 1861-1664 |
Date | 2013-11-01 |
Extra | 00000 |
Journal Abbr | Acta Physiol Plant |
DOI | 10.1007/s11738-013-1342-6 |
Accessed | 10/13/2021, 4:24:04 PM |
Library Catalog | Springer Link |
Language | en |
Abstract | Coffee quality is strongly influenced by a great number of factors, among which the fruit ripening stage at harvest time has a major influence on this feature. Studies comprising ethylene production and the regulation of ethylene biosynthesis genes during the ripening process indicate that ethylene plays an important role on coffee fruit ripening. Coffee early cultivars usually show a more uniform ripening process although little is known about the genetic factors that promote the earliness of ripening. Thus, in order to better understand the physiological and genetic factors involved in the regulation of ripening time, and consequently ripening uniformity, this study aimed to analyze ethylene and respiration patterns during coffee ripening, as well as to analyze ACC oxidase, an ethylene biosynthesis enzyme, gene expression, in fruits of early (Catucaí 785-15) and late (Acauã) coffee cultivars. Coffee fruits were harvested monthly from 124 days after flowering (end of February), until complete maturation (end of June). Dry matter, moisture content, color, respiratory rate and ethylene production analysis were performed. In silico analysis identified a coffee ACC oxidase gene (CaACO-like) and its expression was analyzed by real-time PCR. Dry matter and relative water content constantly increased and gradually decreased, respectively, during fruit ripening, and the color analysis enabled the observation of the earliness in the ripening process displayed by Catucaí 785-15 and its higher fruit ripening uniformity. The results obtained from the CaACO-like expression analysis and respiration and ethylene analysis suggest that the differences in ripening behavior between the two coffee cultivars analyzed in this study may be related to the differences in their capacity to produce ethylene, with fruits of Catucaí 785-15 and Acauã showing a typical and an attenuated climacteric phase, respectively, which may have lead to differences in their ripening time and uniformity. |
Date Added | 10/13/2021, 4:24:04 PM |
Modified | 10/13/2021, 4:24:05 PM |
Type | Journal Article |
---|---|
Author | M. A. Nunes |
Author | J. F. Bierhuizen |
Author | C. Ploegman |
URL | https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1438-8677.1968.tb00109.x |
Volume | 17 |
Issue | 2 |
Pages | 93-102 |
Publication | Acta Botanica Neerlandica |
ISSN | 1438-8677 |
Date | 1968 |
Extra | 00000 _eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1438-8677.1968.tb00109.x |
DOI | 10.1111/j.1438-8677.1968.tb00109.x |
Accessed | 10/13/2021, 4:24:16 PM |
Library Catalog | Wiley Online Library |
Language | en |
Abstract | A study was made on the effect of light and temperature on net photosynthesis, growth and transpiration of Coffea arabica. Net photosynthesis was described as a diffusive process depending on a carbon dioxide gradient and an overall resistance. At a relative low temperature (24 °C), the effect of light on net photosynthesis was comparable with that of most annual agricultural crops. Calculated internal concentration and overall resistance at 0.3 cal cm–2 min–1 were zero p.p.m. and 15 sec cm–1 respectively. Above this temperature each degree rise resulted in an increase of 20 p.p.m. in internal CO2 concentration. This effect alone accounts already for a decrease in dry matter production of approximately 7% per degree centigrade. The increase in internal CO2 was accompanied with an increase of the overall resistance, reducing still more the dry matter production. Low rates of photosynthesis in coffee reported in literature could be explained. Increasing the external CO2 content and thus the CO2 gradient had only a minor effect on photosynthesis. The effect of temperature and light on growth confirmed the conclusions of net photosynthesis research. Since both factors increase transpiration substantially, the water use efficiency decreases strongly with an increase in light and in temperature above 24 °C. The results may have importance for selecting optimum growth conditions for coffee. |
Short Title | Studies on Productivity of Coffee |
Date Added | 10/13/2021, 4:24:16 PM |
Modified | 10/13/2021, 4:24:17 PM |
Type | Journal Article |
---|---|
Author | Anna K Stavrinides |
Author | Stéphane Dussert |
Author | Marie-Christine Combes |
Author | Isabelle Fock-Bastide |
Author | Dany Severac |
Author | Jérôme Minier |
Author | Aldecinei Bastos-Siqueira |
Author | Vincent Demolombe |
Author | Sonia Hem |
Author | Philippe Lashermes |
Author | Thierry Joët |
URL | https://doi.org/10.1093/jxb/erz508 |
Volume | 71 |
Issue | 4 |
Pages | 1418-1433 |
Publication | Journal of Experimental Botany |
ISSN | 0022-0957 |
Date | February 19, 2020 |
Extra | 00000 |
Journal Abbr | Journal of Experimental Botany |
DOI | 10.1093/jxb/erz508 |
Accessed | 10/13/2021, 4:24:59 PM |
Library Catalog | Silverchair |
Abstract | In contrast to desiccation-tolerant ‘orthodox’ seeds, so-called ‘intermediate’ seeds cannot survive complete drying and are short-lived. All species of the genus Coffea produce intermediate seeds, but they show a considerable variability in seed desiccation tolerance (DT), which may help to decipher the molecular basis of seed DT in plants. We performed a comparative transcriptome analysis of developing seeds in three coffee species with contrasting desiccation tolerance. Seeds of all species shared a major transcriptional switch during late maturation that governs a general slow-down of metabolism. However, numerous key stress-related genes, including those coding for the late embryogenesis abundant protein EM6 and the osmosensitive calcium channel ERD4, were up-regulated during DT acquisition in the two species with high seed DT, C. arabica and C. eugenioides. By contrast, we detected up-regulation of numerous genes involved in the metabolism, transport, and perception of auxin in C. canephora seeds with low DT. Moreover, species with high DT showed a stronger down-regulation of the mitochondrial machinery dedicated to the tricarboxylic acid cycle and oxidative phosphorylation. Accordingly, respiration measurements during seed dehydration demonstrated that intermediate seeds with the highest DT are better prepared to cease respiration and avoid oxidative stresses. |
Date Added | 10/13/2021, 4:24:59 PM |
Modified | 10/13/2021, 4:25:01 PM |
Extracted Annotations (10/15/2021, 5:40:54 PM)
"DT is a complex trait that is mostly genetically determined in the developing seed and is put in place during the late maturation program." (p. 1419)
"The late maturation program described in coffee seed is therefore qualitatively comparable to that of orthodox seeds." (p. 1419)
"Seeds at three different maturation stages known to span the acquisition of desiccation tolerance in C. arabica (ST5, ST6, and ST7, Dussert et al., 2018) were collected from three trees of each species from the Biological Resource Center Coffea, Bassin Martin, Reunion Island." (p. 1419)
"The developmental stages were selected based on marked anatomical and morphological seed and fruit traits that are shared across coffee species, as defined and described previously for C. arabica (Joët et al., 2009; Dussert et al., 2018)." (p. 1419)
"Briefly, stage 5 is the peak of reserve deposition and corresponds to endosperm hardening due to massive deposition of galactomannans in cell walls, stage 6 coincides with fruit veraison, and stage 7 corresponds to mature" (p. 1419)
"cherry fruits with red pericarp." (p. 1420)
"Mature seed lots (50 seeds) of C. arabica, C. canephora, and C. eugenioides were desiccated by equilibration over various saturated salt solutions (K-acetate (23% RH), K2CO3 (45% RH), NH4NO3 (62% RH), and (NH4)2SO4 (81% RH)) for 20 d at 27 °C in the dark, as previously described (Dussert et al., 2000)." (p. 1420)
"0 d at 27 °C in the dark, as previously described (Dussert et al., 2000). 18 g of vermiculite fully imbibed with 50 ml of sterile water in closed plastic boxes (Magenta, Chicago, IL, USA). After 6 weeks of culture at 27 °C in the dark, successful seed germination was scored (emergence of the hypocotyl and radicle geotropic growth)." (p. 1420)
"Mature seeds of C. eugenioides and C. arabica were tolerant to relatively intense dehydration, with almost no loss of viability noticed when dried up to 23% RH (Fig. 1A). For both species, the equilibrium relative humidity at which 50% of the initial viability was lost, RH50, was lower than 10%." (p. 1421)
"By contrast, 50ed significantly higher desiccation sensitivity. They could only withstand mild drying without noticeable loss of viability, i.e. drying at 62% RH, and did not survive drying at 23% RH." (p. 1421)
"Finally, a third cluster (C3) included 571 genes specific to a desiccation-sensitive context, i.e. genes that are up-regulated during late maturation in C. canephora seeds, and whose expression is concomitantly lower in both C. arabica and C. eugenioides desiccation-tolerant seeds (Fig. 4)." (p. 1426)
"The Mapman functional classes over-represented within this cluster are mainly related to nitrogen metabolism, tocopherol biosynthesis, and translational" (p. 1426)
"control (Supplementary Table S8)." (p. 1426)
"Phytohormone profiling detected only faint amounts of active molecules in mature seeds and no significant differences among the three species studied (Supplementary Table S14)." (p. 1427)
"our survey highlighted key genes involved in hormone sensing, predominantly in desiccation-sensitive seeds (Supplementary Table S7)." (p. 1427)
"This gene composition fingerprint suggests increased hormone sensitivity in desiccation-sensitive seeds, especially for auxin and cytokinin, while desiccationtolerant seeds displayed higher expression (C1) for NHL6 (Cc05_g06810), a mediator of ABA signaling in Arabidopsis" (p. 1427)
"Similar levels of phytohormones in mature seeds do not exclude the possibility that desiccation-tolerant and -sensitive species integrate and respond to the hormone signals differently." (p. 1428)
"However, the interspecific transcriptome comparison revealed fundamental differences in the regulation of mitochondrial energy metabolism between desiccation-tolerant and desiccation-sensitive seeds." (p. 1428)
"This transcriptional fingerprint suggests a slow-down of the machinery dedicated to oxidative phosphorylation, i.e. ATP production, without necessarily affecting the electron transfer chain operability. By contrast, desiccationsensitive" (p. 1428)
"Respiration rates, estimated as CO2 release, were measured on mature seeds of the three coffee species at various moisture contents upon dehydration (Fig. 7). Within the 0.6-0.8 g H2O g−1 DM hydration window, all seeds displayed roughly equivalent respiratory activities. Upon desiccation, C. arabica and C. eugenioides seeds displayed a smooth reduction in respiration rate until ceasing detectable respiration at approximately n-sensitive C. canephora seeds, however, had a biphasic mode of respiration, initially displaying rather stable respiration rates between 0.8 and 0.4 g H2O g−1 DM. Below this threshold C. canephora seeds experienced drastic reduction in respiration rate that remained significantly higher than that measured for C. arabica and C. eugenioides seeds (Fig. 7)." (p. 1428)
"A large number of processes associated with late maturation are conserved among the three species, as demonstrated through functional enrichment analysis. This suggests a late maturation phase has been conserved during the course of Coffea evolution independently of DT levels." (p. 1429)
"These transcriptomic differences observed between desiccation-tolerant and -sensitive coffee seeds appear to reflect the potential to slow down metabolism and respiration during dehydration rather than an actual slow-down phase during maturation since measured respiration rates in non-dehydrated mature seeds were similar among the three coffee species (Fig. 7)." (p. 1430)
"This mechanism could be shared with intermediate seeds displaying relatively low DT levels. Given that ROS‐provoked mitochondria‐dependent cell death has also been recently described for hydrated orthodox elm seeds under detrimental artificial ageing conditions (Wang et al., 2015), it defines mitochondria and the regulation of respiratory processes as universal targets of seed sensitivity to stress." (p. 1430)
"However, during their dehydration we observed striking differences in respiration rates. A better preparation or coordination of down-regulation of metabolism in desiccation-tolerant seeds during drying could play an important role in avoiding or limiting oxidative stress conditions and/or accumulation of by-products of metabolism to toxic levels." (p. 1430)
"However, it is considered that at intermediate water contents the metabolism that occurs is unregulated, and there is evidence of damaging reactions that are probably free radical-mediated occurring in this water-content range" (p. 1430)
Type | Journal Article |
---|---|
Author | L. F. Gomez |
Author | J. C. Lopez |
Author | N. M. Riano |
Author | Y. Lopez |
Author | E. C. Montoya |
URL | https://doi.org/10.1007/s11099-005-0090-2 |
Volume | 43 |
Issue | 4 |
Pages | 575-582 |
Publication | Photosynthetica |
ISSN | 1573-9058 |
Date | 2005-12-01 |
Extra | 00000 |
Journal Abbr | Photosynthetica |
DOI | 10.1007/s11099-005-0090-2 |
Accessed | 10/13/2021, 4:25:26 PM |
Library Catalog | Springer Link |
Language | en |
Abstract | Diurnal variations in net photosynthetic rate (PN), transpiration rate (E), stomatal conductance (gs), internal CO2 concentration (Ci), and water use efficiency (WUE) were studied on individual leaves of coffee plants to determine the effect of climatic factors on photosynthetic capacity. PN and E showed bimodal behaviour with the maximum values of PN at mid-morning. At noon, under saturating photosynthetically active radiation (PAR) and high leaf temperature (Tl), PN declined. In the afternoon (14:00), PN slightly recovered in association with a decrease in Tl and in leaf-to-air vapour pressure deficit (VPD). Reductions in E during the morning were associated with decreases in gs. Higher WUE in the morning was related to higher PN and lower E. The reverse occurred in the afternoon. Goudriaan's simulation model, adapted for coffee canopy photosynthesis, was tested at the level of whole plant (Ppl). Three methods were used: (a) Whole plant net photosynthesis (Ppl) under semi-controlled conditions in a chamber. (b) Ppl estimation following Goudriaan's method (Gaussian integration) of instantaneous PN in single leaves at three canopy depths and at three different hours assuming a photosynthesis unimodal behaviour. (c) Ppl using Goudriaan's method but at five different hours according to the bimodal behaviour reported above. Results of Ppl estimates using Goudriaan's model adapted for coffee canopy confirm the observed Ppl bimodal behaviour with high fitness degree of the measured whole plant photosynthesis. The high fitness found among observed and simulated data indicates that the modified model may be used as a subroutine for the general simulation model of coffee crop growth. |
Date Added | 10/13/2021, 4:25:26 PM |
Modified | 10/13/2021, 4:25:27 PM |
Type | Journal Article |
---|---|
Author | P. M. Frischknecht |
Author | B. M. Eller |
Author | T. W. Baumann |
URL | https://doi.org/10.1007/BF00397466 |
Volume | 156 |
Issue | 4 |
Pages | 295-301 |
Publication | Planta |
ISSN | 1432-2048 |
Date | 1982-12-01 |
Extra | 00000 |
Journal Abbr | Planta |
DOI | 10.1007/BF00397466 |
Accessed | 10/13/2021, 4:25:46 PM |
Library Catalog | Springer Link |
Language | en |
Abstract | In the leaves of Coffea arabica L., purine alkaloid formation was estimated by analyzing the theobromine and caffeine content and by measuring the methylation rate of [2-14C]theobromine to [2-14C]caffeine in short-term experiments (6–24 h). At the same time, growth (in terms of dry weight and area), net photosynthesis (NPS), and dark respiration were determined. During leaf development, which was considered to be terminated when NPS was at a maximum (60–80 μmol g-1 s-1) and dark respiration at a minimum (5–7.5 μmol g-1 s-1), the content of theobromine and the velocity of caffeine formation were both found to decrease by a factor of more than 100. The close correlation between the theobromine content and the methylation rate is suspended when purine alkaloid formation is influenced by factors other than leaf development. Among these factors, temperature is the most effective: the velocity of caffeine biosynthesis is increased by raising the temperature and vice versa. Although the plants were well irrigated, a drastic decrease of NPS in the afternoon was observed under all environmental conditions tested. Light saturation was reached between 170–360 μmol m-2 s-1. The temperature optimum of NPS was shown to be very broad (24–33°C)m provided the adaptation time was sufficiently long. |
Date Added | 10/13/2021, 4:25:46 PM |
Modified | 10/13/2021, 4:25:47 PM |
Type | Journal Article |
---|---|
Author | Samuel C. V. Martins |
Author | Jeroni Galmés |
Author | Paulo C. Cavatte |
Author | Lucas F. Pereira |
Author | Marília C. Ventrella |
Author | Fábio M. DaMatta |
URL | https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0095571 |
Volume | 9 |
Issue | 4 |
Pages | e95571 |
Publication | PLOS ONE |
ISSN | 1932-6203 |
Date | Apr 17, 2014 |
Extra | 00000 Publisher: Public Library of Science |
Journal Abbr | PLOS ONE |
DOI | 10.1371/journal.pone.0095571 |
Accessed | 10/13/2021, 4:26:10 PM |
Library Catalog | PLoS Journals |
Language | en |
Abstract | It has long been held that the low photosynthetic rates (A) of coffee leaves are largely associated with diffusive constraints to photosynthesis. However, the relative limitations of the stomata and mesophyll to the overall diffusional constraints to photosynthesis, as well as the coordination of leaf hydraulics with photosynthetic limitations, remain to be fully elucidated in coffee. Whether the low actual A under ambient CO2 concentrations is associated with the kinetic properties of Rubisco and high (photo)respiration rates also remains elusive. Here, we provide a holistic analysis to understand the causes associated with low A by measuring a variety of key anatomical/hydraulic and photosynthetic traits in sun- and shade-grown coffee plants. We demonstrate that leaf hydraulic architecture imposes a major constraint on the maximisation of the photosynthetic gas exchange of coffee leaves. Regardless of the light treatments, A was mainly limited by stomatal factors followed by similar limitations associated with the mesophyll and biochemical constraints. No evidence of an inefficient Rubisco was found; rather, we propose that coffee Rubisco is well tuned for operating at low chloroplastic CO2 concentrations. Finally, we contend that large diffusive resistance should lead to large CO2 drawdown from the intercellular airspaces to the sites of carboxylation, thus favouring the occurrence of relatively high photorespiration rates, which ultimately leads to further limitations to A. |
Short Title | Understanding the Low Photosynthetic Rates of Sun and Shade Coffee Leaves |
Date Added | 10/13/2021, 4:26:10 PM |
Modified | 10/13/2021, 4:26:11 PM |
Type | Journal Article |
---|---|
Author | Fábio S. Matos |
Author | Ricardo Wolfgramm |
Author | Fábio V. Gonçalves |
Author | Paulo C. Cavatte |
Author | Marília C. Ventrella |
Author | Fábio M. DaMatta |
URL | https://www.sciencedirect.com/science/article/pii/S0098847209001439 |
Volume | 67 |
Issue | 2 |
Pages | 421-427 |
Publication | Environmental and Experimental Botany |
ISSN | 0098-8472 |
Date | December 1, 2009 |
Extra | 00000 |
Journal Abbr | Environmental and Experimental Botany |
DOI | 10.1016/j.envexpbot.2009.06.018 |
Accessed | 10/13/2021, 4:26:36 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | Phenotypic plasticity to light availability was examined at the leaf level in field-grown coffee trees (Coffea arabica). This species has been traditionally considered as shade-demanding, although it performs well without shade and even out-yields shaded coffee. Specifically, we focused our attention on the morpho-anatomical plasticity, the balance between light capture and excess light energy dissipation, as well as on physiological traits associated with carbon gain. A wide natural light gradient, i.e., a diurnal intercepted photon irradiance differing by a factor of 25 between the deepest shade leaves and the more exposed leaves in the canopy, was explored. Responses of most traits to light were non-linear, revealing the classic leaf sun vs. leaf shade dichotomy (e.g., compared with sun leaves, shade leaves had a lower stomatal density, a thinner palisade mesophyll, a higher specific leaf area, an improved light capture, a lower respiration rate, a lower light compensating point and a limited capacity for photoprotection). The light-saturated rates of net photosynthesis were higher in sunlit than in shade leaves, although sun leaves were not efficient enough to use the extra light supply. However, sun leaves showed well-developed photoprotection mechanisms in comparison to shade leaves, which proved sufficient for avoiding photoinhibition. Specifically, a higher non-photochemical quenching coefficient was found in parallel to increases in: (i) zeaxanthin pools, (ii) de-epoxidation state of the xanthophyll cycle, and (iii) activities of some antioxidant enzymes. Intracanopy plasticity depended on the suite of traits considered, and was high for some physiological traits associated with photoprotection and maintenance of a positive carbon balance under low light, but low for most morpho-anatomical features. Our data largely explain the successful cultivation of the coffee tree in both exposed and shade environments, although with a poor resource-use efficiency in high light. |
Date Added | 10/13/2021, 4:26:37 PM |
Modified | 10/13/2021, 4:26:37 PM |
Type | Journal Article |
---|---|
Author | Rodrigo T. Avila |
Author | Wellington L. de Almeida |
Author | Lucas C. Costa |
Author | Kleiton L. G. Machado |
Author | Marcela L. Barbosa |
Author | Raylla P. B. de Souza |
Author | Pedro B. Martino |
Author | Marco A. T. Juárez |
Author | Dinorah M. S. Marçal |
Author | Samuel C. V. Martins |
Author | José D. C. Ramalho |
Author | Fábio M. DaMatta |
URL | https://www.sciencedirect.com/science/article/pii/S0098847220301635 |
Volume | 177 |
Pages | 104137 |
Publication | Environmental and Experimental Botany |
ISSN | 0098-8472 |
Date | September 1, 2020 |
Extra | 00000 |
Journal Abbr | Environmental and Experimental Botany |
DOI | 10.1016/j.envexpbot.2020.104137 |
Accessed | 10/13/2021, 4:27:17 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | Coffee (Coffea arabica L.) is an important global commodity grown in tropical areas where increased drought severity and frequency are believed to become progressively important due to climate changes. Nonetheless, elevated air [CO2] is thought to be able to mitigate heat and drought stresses. In this study, we tested how carbon assimilation and use are affected by elevated [CO2] in combination with a progressive drought, and how this could impact shifts on biomass accumulation and partitioning. For that, we cultivated coffee plants in open top chambers under greenhouse conditions. Plants grown in 12-L pots were then submitted to ambient (386 ± 20 ppm) or elevated (723 ± 83 ppm) [CO2] during approximately seven months, as well as to varying soil water availabilities (100, 50, 37.5, 25 or 20 % of soil field capacity). Our results demonstrate that elevated [CO2] improved carbon assimilation rates (>60 %) with unaltered stomatal conductance and no signs of photosynthetic downregulation. This was accompanied by increases in water-use efficiency, respiration rates and biomass accumulation regardless of watering, and decreased photorespiration rates and oxidative pressure under drought. Improved growth under elevated [CO2] was more evident under drought than under full irrigation, and was unlikely to have been associated with global changes on hormonal pools, but rather with shifts on carbon fluxes. Finally, elevated [CO2] promoted key allometric adjustments linked to drought tolerance, e.g., more biomass partitioning towards roots with greater root length. Collectively, our results offer novel and timely information on the mitigating ability of elevated [CO2] on the photosynthetic performance and growth of coffee plants under drought conditions. |
Date Added | 10/13/2021, 4:27:17 PM |
Modified | 10/13/2021, 4:27:18 PM |
Type | Journal Article |
---|---|
Author | Herminia E. P. Martinez |
Author | Bruna P. de Souza |
Author | Eveline T. Caixeta |
Author | Felipe P. de Carvalho |
Author | Junia M. Clemente |
URL | https://www.sciencedirect.com/science/article/pii/S0304423820300820 |
Volume | 267 |
Pages | 109254 |
Publication | Scientia Horticulturae |
ISSN | 0304-4238 |
Date | June 1, 2020 |
Extra | 00000 |
Journal Abbr | Scientia Horticulturae |
DOI | 10.1016/j.scienta.2020.109254 |
Accessed | 10/13/2021, 4:27:48 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | Brazilian coffee cultivation has been expanding into areas of low fertility soils, many times subjected to low water availability, where the use of nitrogen fertilizers is high. To evaluate the effect of water stress on nitrate uptake and on the expression of genes that encode the nitrate uptake and assimilation we have done three experiments with Coffea arabica L. plants. The first was an 8 × 2 factorial (eight coffee cultivars x with or without water stress), with three replicates. We obtained the kinetic parameters of nitrate uptake. The second and third experiments consisted of 2 × 2 (two cultivars x with or without water stress) factorials. One of them was conducted with adequate supply of nitrogen and the other with omission of N. The transcriptional profiles of the genes NRT1.2, NRT3.2, NIA2, GLT, and GLN1.3 were analyzed. Water stress decreased Vmax (maximum velocity of absorption), Km (Michaelis-Menten constant), and Cmin (external concentration at which net uptake of ions is zero) in all cultivars. The cultivar Catuaí Amarelo IAC 62 stood out with high Vmax and low Km in both conditions, and the Cultivar Mundo Novo IAC379-19, although with low Vmax, had low Km and low Cmin, without changes under water stress. In plants under water stress, the genes NRT1.2, NRT3.2, NIA2, and GLT showed higher differential transcription in root systems. GLN1.3 gene had higher relative expression in the shoots. Under water stress, the relative expression of these genes was higher in Mundo Novo IAC 379-19 than in Catuaí Amarelo IAC 62 in both nitrogen doses. |
Date Added | 10/13/2021, 4:27:48 PM |
Modified | 10/13/2021, 4:27:48 PM |
Type | Journal Article |
---|---|
Author | H. Bauer |
Author | R. Wierer |
Author | W. H. Hatheway |
Author | W. Larcher |
URL | https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1399-3054.1985.tb08521.x |
Volume | 64 |
Issue | 4 |
Pages | 449-454 |
Publication | Physiologia Plantarum |
ISSN | 1399-3054 |
Date | 1985 |
Extra | 00000 _eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1399-3054.1985.tb08521.x |
DOI | 10.1111/j.1399-3054.1985.tb08521.x |
Accessed | 10/13/2021, 4:28:02 PM |
Library Catalog | Wiley Online Library |
Language | en |
Abstract | Net photosynthetic CO2 exchange of 1-year-old plants of Coffea arabica L. was studied after the above-ground parts had been exposed once or repeatedly to night temperatures in the chilling range. Chill-reduced rates of CO2 uptake (measured at 24°C and at natural CO, level) were observed after a 12 h night exposure to about 6°C. After exposure to 4°C, activity was reduced to less than half of that of the controls, and after exposure to 0.5°C the leaves suffered visible necrotic injury and were no longer able to take up Co2 If the leaves were not lethally injured, net photosynthesis recovered completely within 2 to 6 days. About 25% of chill-induced reduction of CO2 uptake was due to reduced stomatal aperture and 75% to impairment of carboxylation efficiency. Chilling on successive nights at 4–6°C reduced CO, uptake progressively on each day following treatment. After 10 nights, activity was decreased to less than 10% of initial performance. Conditioning at temperatures slightly above the chilling level (e.g. 15/I2°C) for 2 weeks led to almost complete impairment of photosynthetic activity without additional chilling stress instead of improving chilling tolerance. |
Date Added | 10/13/2021, 4:28:02 PM |
Modified | 10/13/2021, 4:28:03 PM |
Type | Journal Article |
---|---|
Author | Danielle E. Marias |
Author | Frederick C. Meinzer |
Author | Christopher Still |
URL | https://onlinelibrary.wiley.com/doi/abs/10.1002/ece3.2681 |
Volume | 7 |
Issue | 4 |
Pages | 1297-1310 |
Publication | Ecology and Evolution |
ISSN | 2045-7758 |
Date | 2017 |
Extra | 00000 _eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.2681 |
DOI | 10.1002/ece3.2681 |
Accessed | 10/13/2021, 4:29:35 PM |
Library Catalog | Wiley Online Library |
Language | en |
Abstract | Given future climate predictions of increased temperature, and frequency and intensity of heat waves in the tropics, suitable habitat to grow ecologically, economically, and socially valuable Coffea arabica is severely threatened. We investigated how leaf age and heat stress duration impact recovery from heat stress in C. arabica. Treated plants were heated in a growth chamber at 49°C for 45 or 90 min. Physiological recovery was monitored in situ using gas exchange, chlorophyll fluorescence (the ratio of variable to maximum fluorescence, FV/FM), and leaf nonstructural carbohydrate (NSC) on mature and expanding leaves before and 2, 15, 25, and 50 days after treatment. Regardless of leaf age, the 90-min treatment resulted in greater FV/FM reduction 2 days after treatment and slower recovery than the 45-min treatment. In both treatments, photosynthesis of expanding leaves recovered more slowly than in mature leaves. Stomatal conductance (gs) decreased in expanding leaves but did not change in mature leaves. These responses led to reduced intrinsic water-use efficiency with increasing heat stress duration in both age classes. Based on a leaf energy balance model, aftereffects of heat stress would be exacerbated by increases in leaf temperature at low gs under full sunlight where C. arabica is often grown, but also under partial sunlight. Starch and total NSC content of the 45-min group significantly decreased 2 days after treatment and then accumulated 15 and 25 days after treatment coinciding with recovery of photosynthesis and FV/FM. In contrast, sucrose of the 90-min group accumulated at day 2 suggesting that phloem transport was inhibited. Both treatment group responses contrasted with control plant total NSC and starch, which declined with time associated with subsequent flower and fruit production. No treated plants produced flowers or fruits, suggesting that short duration heat stress can lead to crop failure. |
Date Added | 10/13/2021, 4:29:35 PM |
Modified | 10/13/2021, 4:29:36 PM |
Type | Journal Article |
---|---|
Author | Paulo E Menezes-Silva |
Author | Lilian M V P Sanglard |
Author | Rodrigo T Ávila |
Author | Leandro E Morais |
Author | Samuel C V Martins |
Author | Priscilla Nobres |
Author | Camila M Patreze |
Author | Marcio A Ferreira |
Author | Wagner L Araújo |
Author | Alisdair R Fernie |
Author | Fábio M DaMatta |
URL | https://doi.org/10.1093/jxb/erx211 |
Volume | 68 |
Issue | 15 |
Pages | 4309-4322 |
Publication | Journal of Experimental Botany |
ISSN | 0022-0957 |
Date | September 9, 2017 |
Extra | 00000 |
Journal Abbr | Journal of Experimental Botany |
DOI | 10.1093/jxb/erx211 |
Accessed | 10/13/2021, 4:30:01 PM |
Library Catalog | Silverchair |
Abstract | Over the last decades, most information on the mechanisms underlying tolerance to drought has been gained by considering this stress as a single event that happens just once in the life of a plant, in contrast to what occurs under natural conditions where recurrent drought episodes are the rule. Here we explored mechanisms of drought tolerance in coffee (Coffea canephora) plants from a broader perspective, integrating key aspects of plant physiology and biochemistry. We show that plants exposed to multiple drought events displayed higher photosynthetic rates, which were largely accounted for by biochemical rather than diffusive or hydraulic factors, than those submitted to drought for the first time. Indeed, these plants displayed higher activities of RuBisCO and other enzymes associated with carbon and antioxidant metabolism. Acclimation to multiple drought events involved the expression of trainable genes related to drought tolerance and was also associated with a deep metabolite reprogramming with concordant alterations in central metabolic processes such as respiration and photorespiration. Our results demonstrate that plants exposed to multiple drought cycles can develop a differential acclimation that potentiates their defence mechanisms, allowing them to be kept in an ‘alert state’ to successfully cope with further drought events. |
Date Added | 10/13/2021, 4:30:01 PM |
Modified | 10/13/2021, 4:30:02 PM |
Type | Journal Article |
---|---|
Author | Angela Pierre Vitória |
Author | Paulo Mazzafera |
URL | https://doi.org/10.1021/jf980892a |
Volume | 47 |
Issue | 5 |
Pages | 1851-1855 |
Publication | Journal of Agricultural and Food Chemistry |
ISSN | 0021-8561 |
Date | 1999-05-01 |
Extra | 00000 Publisher: American Chemical Society |
Journal Abbr | J. Agric. Food Chem. |
DOI | 10.1021/jf980892a |
Accessed | 10/13/2021, 4:30:52 PM |
Library Catalog | ACS Publications |
Abstract | The degradation of xanthine was studied in young and aged leaves and in immature and mature fruits of Coffea arabica and Coffea dewevrei, which differ with respect to caffeine catabolism. Radioisotope feeding experiments showed that leaves degraded xanthine more readily than fruits but that mature fruits and aged leaves were less efficient than younger tissues. In all cases, a significant part of the recovered radioactivity was in the ureides. Xanthine dehydrogenase was characterized as the enzyme responsible for xanthine degradation, and its activity and that of uricase were consistent with the results obtained in the radioisotope feeding experiments. Activities of allantoinase and allantoate amidohydrolase could not be detected. Considerable levels of endogenous allantoin and allantoic acid were found in fruits and leaves. Therefore, ureide accumulation might be a consequence of low enzyme activity. There was no positive correlation between urease activity and the data from the radioisotope feeding experiments. Keywords: Allantoic acid; allantoin; Coffea arabica; Coffea dewevrei; uric acid; xanthine. |
Date Added | 10/13/2021, 4:30:52 PM |
Modified | 10/13/2021, 4:30:53 PM |
Type | Journal Article |
---|---|
Author | Yonara Poltronieri |
Author | Herminia E P Martinez |
Author | Paulo R Cecon |
URL | https://onlinelibrary.wiley.com/doi/abs/10.1002/jsfa.4483 |
Volume | 91 |
Issue | 13 |
Pages | 2431-2436 |
Publication | Journal of the Science of Food and Agriculture |
ISSN | 1097-0010 |
Date | 2011 |
Extra | 00000 _eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1002/jsfa.4483 |
DOI | 10.1002/jsfa.4483 |
Accessed | 10/13/2021, 4:31:34 PM |
Library Catalog | Wiley Online Library |
Language | en |
Abstract | BACKGROUND: In Brazil, the usual forms of zinc (Zn) supply to coffee plants have limitations that compromise the element availability to the plant. This study proposes to test an alternative approach to supplying the nutrient to Coffea arabica L. using trunk implanted zinc tablets. Additionally, the effect of Zn on the production and quality of coffee beans was also evaluated. RESULTS: The highest total coffee bean production was recorded in plants implanted with Zn tablets (TA), while the lowest was recorded in the control treatment, without zinc supply (WZn), reaching a bianual production of 188.2 and 130.1 60-kg bags of processed beans per hectare, respectively. In the treatments where Zn were applied as tablet implantation or as foliage spraying (SZn); the bean size was larger, while the grain electrical conductivity and potassium leaching were lower compared with WZn. CONCLUSION: Zn supply via tablet implantation into tree trunks provides yield and quality similar to those obtained by foliage spraying. Independent of the form of supply, Zn positively influences the production and quality of coffee beans. Copyright © 2011 Society of Chemical Industry |
Date Added | 10/13/2021, 4:31:34 PM |
Modified | 10/13/2021, 4:31:35 PM |
Type | Journal Article |
---|---|
Author | Herminia Emilia Prieto Martinez |
Author | Yonara Poltronieri |
Author | Adriana Farah |
Author | Daniel Perrone |
URL | http://www.scielo.br/j/rceres/a/8Z4gYwdzS3NHfmNMSkhPFYz/?lang=en |
Volume | 60 |
Pages | 293-299 |
Publication | Revista Ceres |
ISSN | 0034-737X, 2177-3491 |
Date | 2013-04 |
Extra | 00000 Publisher: Universidade Federal de Viçosa |
Journal Abbr | Rev. Ceres |
DOI | 10.1590/S0034-737X2013000200020 |
Accessed | 10/13/2021, 4:32:45 PM |
Library Catalog | SciELO |
Language | en |
Abstract | Besides its importance in the coffee tree nutrition, there is almost no information relating zinc nutrition and bean quality. This work evaluated the effect of zinc on the coffee yield and bean quality. The experiment was conducted with Coffea arabica L. in "Zona da Mata" region, Minas Gerais, Brazil. Twelve plots were established at random with 4 competitive plants each. Treatments included plants supplemented with zinc (eight plots) and control without zinc supplementation (four plots). Plants were subjected to two treatments: zinc supplementation and control. Yield, number of defective beans, beans attacked by berry borers, bean size, cup quality, beans zinc concentration, potassium leaching, electrical conductivity, color index, total tritable acidity, pH, chlorogenic acids contents and ferric-reducing antioxidant activity of beans were evaluated. Zinc positively affected quality of coffee beans, which presented lower percentage of medium and small beans, lower berry borer incidence, lower potassium leaching and electrical conductivity, higher contents of zinc and chlorogenic acids and higher antioxidant activity in comparison with control beans. |
Date Added | 10/13/2021, 4:32:45 PM |
Modified | 10/13/2021, 4:32:45 PM |
Type | Journal Article |
---|---|
Author | Sylvana Naomi Matsumoto |
Author | Fábio Martins de Carvalho |
Author | Anselmo Eloy Silveira Viana |
Author | Marcelo Ribeiro Malta |
Author | Luciana Gomes Castro |
URL | http://www.sbicafe.ufv.br/handle/123456789/5632 |
Volume | 3 |
Issue | 1 |
Pages | 10 |
Publication | Coffee Science |
ISSN | 1984-3909 |
Date | 2008-01 |
Extra | 00000 Accepted: 2016-02-18T16:31:14Z Publisher: Editora UFLA |
Accessed | 10/13/2021, 4:33:20 PM |
Library Catalog | tot.dti.ufv.br |
Language | en |
Abstract | The objective of this study was to evaluate growth alterations and water relations in coffee plants (Coffea arabica L.) at the initial stage of development, grown in nutritive solution (hydroponics) and submitted to a wide variation of P doses. The various doses of P applied to the coffee plants similarly affected the growth characteristics evaluated (number of leaves, height, total leaf area, and dry and green mass accumulation), fitting a logarithmic model, with a direct relationship between P doses and growth. The logarithmic model was also fitted to the leaf water potential module, evaluated in the pre-dawn period and at noon. However, the direct relationship between P doses and water potential was only verified for determinations made at noon; the opposite behavior occurred with readings made in the pre-dawn period, since values decreased as P doses increased. Interactions between P and N nutritional status as well as between P and the water status of plants are discussed, with emphasis on the importance of future investigations. |
Date Added | 10/13/2021, 4:33:20 PM |
Modified | 10/18/2021, 10:39:29 PM |
Type | Journal Article |
---|---|
Author | Tiago Benedito dos Santos |
Author | Joni Esrom Lima |
Author | Mariane Silva Felicio |
Author | João Danillo Moura Soares |
Author | Douglas Silva Domingues |
URL | http://www.scielo.br/j/gmb/a/5qPHPsWdDgSDzBngNfTqkMN/?lang=en&format=html |
Volume | 40 |
Pages | 346-359 |
Publication | Genetics and Molecular Biology |
ISSN | 1415-4757, 1678-4685 |
Date | 2017-04-10 |
Extra | 00000 Publisher: Sociedade Brasileira de Genética |
Journal Abbr | Genet. Mol. Biol. |
DOI | 10.1590/1678-4685-GMB-2016-0041 |
Accessed | 10/13/2021, 4:34:33 PM |
Library Catalog | SciELO |
Language | en |
Abstract | Abstract Nitrogen (N) is quantitatively the main nutrient required by coffee plants, with acquisition mainly by the roots and mostly exported to coffee beans. Nitrate (NO3–) and ammonium (NH4+) are the most important inorganic sources for N uptake. Several N transporters encoded by different gene families mediate the uptake of these compounds. They have an important role in source preference for N uptake in the root system. In this study, we performed a genome-wide analysis, including in silico expression and phylogenetic analyses of AMT1, AMT2, NRT1/PTR, and NRT2 transporters in the recently sequenced Coffea canephora genome. We analyzed the expression of six selected transporters in Coffea arabica roots submitted to N deficiency. N source preference was also analyzed in C. arabica using isotopes. C. canephora N transporters follow the patterns observed for most eudicots, where each member of the AMT and NRT families has a particular role in N mobilization, and where some of these are modulated by N deficiency. Despite the prevalence of putative nitrate transporters in the Coffea genome, ammonium was the preferential inorganic N source for N-starved C. arabica roots. This data provides an important basis for fundamental and applied studies to depict molecular mechanisms involved in N uptake in coffee trees. |
Date Added | 10/13/2021, 4:34:33 PM |
Modified | 10/13/2021, 4:34:33 PM |
Type | Journal Article |
---|---|
Author | Marcelo Antonio Tomaz |
Author | Herminia Emilia Pietro Martinez |
Author | Ney Sussumu Sakiyama |
Author | Cosme Damião Cruz |
Author | Antonio Alves Pereira |
URL | http://www.scielo.br/j/rbcs/a/yLFcJfQKffrv5HZyMjDqkBj/abstract/?format=html&lang=en |
Volume | 30 |
Pages | 377-384 |
Publication | Revista Brasileira de Ciência do Solo |
ISSN | 1806-9657 |
Date | 2006-04 |
Extra | 00000 Publisher: Sociedade Brasileira de Ciência do Solo |
Journal Abbr | Rev. Bras. Ciênc. Solo |
DOI | 10.1590/S0100-06832006000200017 |
Accessed | 10/13/2021, 4:34:50 PM |
Library Catalog | SciELO |
Language | en |
Abstract | Comparativamente ao pé-franco, a combinação enxerto/porta-enxerto altera os complexos mecanismos de "feedback" entre parte aérea e raízes, afetando de maneira positiva ou negativa a eficiência nutricional da planta. Este trabalho teve como objetivo avaliar, em cultivo hidropônico, a eficiência da absorção, translocação e utilização de Zn, Cu e Mn por mudas de Coffea arabica L., de acordo com o porta-enxerto utilizado. O experimento foi realizado em casa de vegetação, por um período de 170 dias, em vasos que continham areia como substrato, recebendo solução nutritiva circulante. Utilizaram-se, como enxerto, quatro genótipos de C. arabica: os cultivares Catuaí Vermelho IAC 15 e Oeiras MG 6851 e os híbridos 'H 419-10-3-1-5' e 'H 514-5-5-3' , e, como porta-enxerto, quatro genótipos, sendo três de Coffea canephora Pierre ex Froenher: Apoatã LC 2258, Conilon Muriaé-1 e RC EMCAPA 8141 (recombinação entre clones da variedade Robustão Capixaba - EMCAPA 8141) e uma linhagem de Coffea arabica L.: Mundo Novo IAC 376-4, além de quatro pés-francos. O delineamento experimental utilizado foi em blocos casualizados com 20 tratamentos, quatro repetições e uma planta por parcela. A eficiência nutricional das mudas quanto ao Zn, Cu e Mn variou de acordo com a combinação enxerto/porta-enxerto. A progênie 'H 514-5-5-3' foi mais eficiente quanto à utilização de Zn, Cu e Mn e produção de matéria seca, quando combinada com os porta-enxertos Apoatã LC 2258 e Mundo Novo IAC 376-4. O Catuaí Vermelho IAC 15 foi mais eficiente na utilização de Cu e Mn quando combinado com Apoatã LC 2258. |
Date Added | 10/13/2021, 4:34:50 PM |
Modified | 10/13/2021, 4:34:50 PM |
Type | Journal Article |
---|---|
Author | Fabrício A. Rodrigues |
Author | Vivian Carré-Missio |
Author | Gulab N. Jham |
Author | Mark Berhow |
Author | Daniel A. Schurt |
URL | http://www.scielo.br/j/tpp/a/PjKDmmy5kHRdWmBpTTkRvZx/?lang=en&format=html |
Volume | 36 |
Pages | 404-408 |
Publication | Tropical Plant Pathology |
ISSN | 1982-5676, 1983-2052 |
Date | 2011-12 |
Extra | 00000 Publisher: Sociedade Brasileira de Fitopatologia |
Journal Abbr | Trop. plant pathol. |
DOI | 10.1590/S1982-56762011000600010 |
Accessed | 10/13/2021, 4:35:03 PM |
Library Catalog | SciELO |
Language | en |
Abstract | Rust, caused by Hemileia vastatrix, is the main disease that decreases coffee production in Brazil. New and enhanced methods to reduce rust intensity that can be integrated with modern genetic and chemical approaches need to be investigated. Considering that many plant species supplied with silicon (Si) show increased resistance to several pathogens, this study examined the possible effect of this element in increasing chlorogenic acid (CA) concentrations in coffee leaves and, consequently, increasing the level of resistance to rust. Plants (cv. "Catuaí Vermelho IAC 44") were inoculated with H. vastatrix after growing for 35 days in a hydroponic culture amended with 0 (-Si) or 2 (+Si) mM Si. Concentration of Si in leaf tissues was of 0.36 and 0.42 dag/kg for -Si and +Si treatments, respectively, but without a statistically significant difference. The area under rust progress curve was 154.5 and 119.4 for -Si and +Si treatments, respectively, but without significant statistical difference. For non-inoculated plants, the concentrations of total CA and caffeoyl-quinic acid (CQA)compounds (diCQA) were similar between -Si and +Si treatments. Even though there was an increase of 236.4 and 257.1%, respectively, for total CA and diCQA for +Si when compared to -Si treatment at 30 days after inoculation with H. vastatrix, reduction on rust severity was not obtained once the fungus had already colonized the leaf tissues. Therefore, regardless of the increase in the concentrations of chlorogenic acid on leaves, coffee resistance to H. vastatrix infection was not potentialized by Si. |
Date Added | 10/13/2021, 4:35:03 PM |
Modified | 10/13/2021, 4:35:03 PM |
Type | Thesis |
---|---|
Author | Vanessa Cristina Stein |
URL | http://www.sbicafe.ufv.br/handle/123456789/6681 |
Place | Lavras, Minas Gerais, Brasil |
Date | 2009-08-28 |
Extra | 00000 Accepted: 2016-05-12T11:39:15Z Publisher: Universidade Federal de Lavras |
Accessed | 10/13/2021, 4:35:46 PM |
Library Catalog | www.sbicafe.ufv.br |
Language | en |
University | Universidade Federal de Lavras |
Abstract | Overexpression of SHINE gene induces the expression of these stress- related genes under normal growth conditions in transgenic plants and then confers the improved tolerance to drought. In recent years rapid procedures for obtaining transgenic roots have been developed using Agrobacterium rhizogenes, leading to the production of so-called “composite plants” comprising a transgenic hairy root system attached to non-transformed shoots and leaves. In the chapter II was determined the effect of (over)expression of the Arabidopsis SHN2 gene in stable and/or chimeric transgenic Arabidopsis thaliana and Brassica rapa plants subjected to drought treatment. In the chapter III was developed an efficient method for coffee genetic transformation by A. rhizogenes in order to create chimeric C. arabica (Catuaí Vermelho IAC 144) with wild-type shoots and transgenic roots for rapid testing of potentially interesting gene construct for future stable transformation using A. tumefaciens or A. rhizogenes and in the chapter IV was expressed the SHN2 gene of Arabidopsis thaliana in transgenic hairy roots of Coffea arabica after Agrobacterium rhizogenes-mediated root transformation in order to improve the drought tolerance of such chimeric plants. 50% of the 35S::SHN2 chimaric transgenic Arabdopsis plants exposed to 10 days withholding water and rewatered for one week recovered the drought treatment. In the coffee transformation 42% of hypocotyls infected A. rhizogenes contained pREDRoot plasmid had at least one transgenic roots and hypocotyls infected with A. rhizogenes contained pMOG22-35S::SHN2 and showed 32% of transformation. In the coffee drought experiment the DsRED (control) chimeric plants did not recover from the 15-day dehydration treatment and completely dried out all while the 35S:SHN2 chimeric plants recovered and become greener and stronger. |
# of Pages | 109 |
Date Added | 10/13/2021, 4:35:46 PM |
Modified | 10/18/2021, 9:27:57 PM |
Type | Thesis |
---|---|
Author | Almas Hamadi |
URL | http://www.suaire.sua.ac.tz/handle/123456789/1454 |
Date | 2016 |
Extra | 00000 Accepted: 2017-04-19T08:21:18Z |
Accessed | 10/13/2021, 4:36:10 PM |
Library Catalog | 41.73.194.142 |
Type | Thesis |
Language | en |
University | Sokoine University of Agriculture |
Abstract | The study aimed at identifying the best varieties among the four Robusta coffee varieties in terms of N, P and K nutrients use efficiency, absorption efficiency and translocation efficiency. First, a survey was conducted to determine the fertility status of the coffee growing areas in eight villages namely Igomba, Kiilima, Katangalala, Mishozi, Katale, Bugabo, Bulinda and Bugaruka. Then, a screen house pot experiment was conducted in a Completely Randomized Design in a 3x4 factorial scheme with three rates of N, P and K; Urea (0, 150, 300 kg N/ha equivalent to 0, 75, 150 mg N/kg of soil), TSP (0, 75, 150 kg P/ha equivalent to 0, 37.5, 75 mg P/kg of soil) and KCl (0, 150, 300 kg K/ha equivalent to 0, 75, 150 mg K/kg of soil) and four Robusta coffee varieties (MR 10, BK 27, ML 2 and 13/61). After 6 months, the whole plants were uprooted, washed and roots separated from the aerial parts for determination of shoot dry matter and root dry matter, and N, P and K contents in the whole coffee plants. Nutrient use efficiency, nutrient absorption efficiency and nutrient translocation efficiency for N, P and K were calculated. Results indicated that the overall soil fertility status of the surveyed areas were generally low, with low pH ranged from 4.12 to 5.53, organic carbon ranged from 0.09% to 2.25%, total nitrogen range from 0.056 to 0.192 %, available P ranged from 20.21 to 68.29 mg/kg and potassium ranged from 0.11 to 1.81 cmol (+) kg-1. The varieties MR 10, BK 27 and 13/61 are most efficient in low nitrogen. Varieties BK 27 and 13/61 are most efficient in low soil P and K. Varieties which are more responsive and efficient to absorb translocation and use the added nutrients' elements and hence can adapt to low soil fertility areas are BK 27, 13/61 and MR 10. In order to improve the production level of coffee in Kagera, distribution of the most responsive varieties should be the first priority. |
Date Added | 10/13/2021, 4:36:10 PM |
Modified | 10/13/2021, 4:36:10 PM |
Type | Journal Article |
---|---|
Author | José C. Ramalho |
Author | Ana P. Rodrigues |
Author | José N. Semedo |
Author | Isabel P. Pais |
Author | Lima D. Martins |
Author | Maria C. Simões-Costa |
Author | António E. Leitão |
Author | Ana S. Fortunato |
Author | Paula Batista-Santos |
Author | Isabel M. Palos |
Author | Marcelo A. Tomaz |
Author | Paula Scotti-Campos |
Author | Fernando C. Lidon |
Author | Fábio M. DaMatta |
URL | https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0082712 |
Volume | 8 |
Issue | 12 |
Pages | e82712 |
Publication | PLOS ONE |
ISSN | 1932-6203 |
Date | Dec 6, 2013 |
Extra | Publisher: Public Library of Science |
Journal Abbr | PLOS ONE |
DOI | 10.1371/journal.pone.0082712 |
Accessed | 10/13/2021, 4:40:28 PM |
Library Catalog | PLoS Journals |
Language | en |
Abstract | Coffee is one of the world’s most traded agricultural products. Modeling studies have predicted that climate change will have a strong impact on the suitability of current cultivation areas, but these studies have not anticipated possible mitigating effects of the elevated atmospheric [CO2] because no information exists for the coffee plant. Potted plants from two genotypes of Coffea arabica and one of C. canephora were grown under controlled conditions of irradiance (800 μmol m-2 s-1), RH (75%) and 380 or 700 μL CO2 L-1 for 1 year, without water, nutrient or root development restrictions. In all genotypes, the high [CO2] treatment promoted opposite trends for stomatal density and size, which decreased and increased, respectively. Regardless of the genotype or the growth [CO2], the net rate of CO2 assimilation increased (34-49%) when measured at 700 than at 380 μL CO2 L-1. This result, together with the almost unchanged stomatal conductance, led to an instantaneous water use efficiency increase. The results also showed a reinforcement of photosynthetic (and respiratory) components, namely thylakoid electron transport and the activities of RuBisCo, ribulose 5-phosphate kinase, malate dehydrogenase and pyruvate kinase, what may have contributed to the enhancements in the maximum rates of electron transport, carboxylation and photosynthetic capacity under elevated [CO2], although these responses were genotype dependent. The photosystem II efficiency, energy driven to photochemical events, non-structural carbohydrates, photosynthetic pigment and membrane permeability did not respond to [CO2] supply. Some alterations in total fatty acid content and the unsaturation level of the chloroplast membranes were noted but, apparently, did not affect photosynthetic functioning. Despite some differences among the genotypes, no clear species-dependent responses to elevated [CO2] were observed. Overall, as no apparent sign of photosynthetic down-regulation was found, our data suggest that Coffea spp. plants may successfully cope with high [CO2] under the present experimental conditions. |
Date Added | 10/13/2021, 4:40:28 PM |
Modified | 10/13/2021, 4:40:29 PM |
Type | Journal Article |
---|---|
Author | José C. Ramalho |
Author | Thijs L. Pons |
Author | Henri W. Groeneveld |
Author | Helena G. Azinheira |
Author | M. Antonieta Nunes |
URL | https://www.publish.csiro.au/fp/pp99013 |
Volume | 27 |
Issue | 1 |
Pages | 43-51 |
Publication | Functional Plant Biology |
ISSN | 1445-4416 |
Date | 2000 |
Extra | Publisher: CSIRO PUBLISHING |
Journal Abbr | Functional Plant Biol. |
DOI | 10.1071/pp99013 |
Accessed | 10/13/2021, 5:05:31 PM |
Library Catalog | www.publish.csiro.au |
Language | en |
Abstract | Young coffee plants (Coffea arabica L. cv. Catuaí), originally from a shaded habitat, were separated in three groups to be grown under different levels of N fertilization: 0.3 mmol N supplements were given to the soil every 7 days (high N treatment, 2N), every 15 days (medium N treatment, 1N) and every 45 days (low N treatment, 0N). These plants were later exposed to a high sunlight irradiance (noon PPFD up to 1500 µmol m–2 s–1 ) for a period of 12 or 15 days. Among others, the values of electron trans-port capacity, maximum carboxylation activity, photosynthetic capacity (Amax) and several fluorescence parameters (Fv/Fm, Fv´/Fm´, qP, &phis;e) first showed a reduction (until the 4th–7th day) in all N treatments, followed by an N-dependent recovery. The 2N plants were less affected in the first few days and, at the end of the stress period, showed a better recovery for most of the studied parameters and the highest increase in the saturating PPFD for net photosynthesis and A max . The present work shows that the ability to acclimate displayed by the mature leaves of 2N plants was accompanied by an increase in energy dis-sipation mechanisms. These include an increase in the ‘high energy’ quenching and, mostly, the presence of higher contents of some xanthophylls (zeaxanthin and lutein) and carotenes, which helped to decrease the energetic overcharge in the photosystems. Pigment changes in mature leaves suggest that N can promote specific mechanisms of acclimation others than those that might be expected from a preferential partition of the element N into photosynthetic components. |
Short Title | Photosynthetic acclimation to high light conditions in mature leaves of Coffea arabica L. |
Date Added | 10/13/2021, 5:05:31 PM |
Modified | 10/13/2021, 5:05:31 PM |
Type | Journal Article |
---|---|
Author | Xiaogang Liu |
Author | Fusheng Li |
Author | Yan Zhang |
Author | Qiliang Yang |
URL | https://www.sciencedirect.com/science/article/pii/S0378377416301226 |
Volume | 172 |
Pages | 1-8 |
Publication | Agricultural Water Management |
ISSN | 0378-3774 |
Date | July 1, 2016 |
Journal Abbr | Agricultural Water Management |
DOI | 10.1016/j.agwat.2016.04.007 |
Accessed | 10/13/2021, 5:05:55 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | The objective of this study was to obtain water and nitrogen (N) management mode for water saving, high quality and proper yield of Arabica coffee in dry and hot region of southwest China. Taking full irrigation (FI) as the control, the effects of three deficit irrigation (DI) levels (DI80, DI60 and DI40, with irrigation amount of 80, 60 and 40% FI, respectively) in dry season on growth, yield, nutritional quality and water use efficiency (WUE) of Arabica coffee were investigated under three N rates (NH: 140, NM: 100 and NL: 60gN plant−1) using field experiments from 2013 to 2015, and the comprehensive benefit of yield and nutritional quality was evaluated using the technique for ordering preferences by similarity to ideal solution (TOPSIS) method. Compared with FI, DI80 increased two-year averaged contents of protein, crude fat and chlorogenic acid in dry bean by 9.4, 26.0 and 12.5%, respectively, but reduced dry bean yield by 6.4%. DI60 and DI40 reduced dry bean yield and water use efficiency (WUE) greatly, but increased the contents of caffeine and crude fiber in dry bean. Compared with NL, enhancing N rate increased dry bean yield, WUE, and the contents of protein and chlorogenic acid in dry bean by 32.9–42.6, 32.1–45.4, 5.9–9.7 and 7.0–12.6%, respectively, and NM level had the largest dry bean yield, WUE and chlorogenic acid content in dry bean. FINM treatment had the largest two-year averaged dry bean yield of 5587.42kgha−1 and 31.8% higher than FINL treatment. DI80NH treatment had the best comprehensive benefit of yield and nutritional quality. Compared with FINL treatment, DI80NH treatment increased two-year averaged dry bean yield, WUE and the contents of protein and chlorogenic acid by 29.5, 42.7, 19.3 and 20.0%, respectively. Thus the treatment of high N (140g plant−1) and moderate deficit irrigation (irrigation amount was 80% of FI) was the suitable mode of water and nitrogen management for Arabica coffee, which could realize water-saving, high quality and proper yield of Arabica coffee simultaneously in the dry and hot region of southwest China. |
Date Added | 10/13/2021, 5:05:55 PM |
Modified | 10/13/2021, 5:05:55 PM |
Type | Journal Article |
---|---|
Author | Fábio Luiz Partelli |
Author | Henrique Duarte Vieira |
Author | Marco Antônio Martins |
URL | http://www.sbicafe.ufv.br/handle/123456789/3905 |
ISSN | 1984-3909 |
Date | 2006-04 |
Extra | Accepted: 2015-07-08T18:04:50Z Publisher: Editora UFLA |
Accessed | 10/13/2021, 5:06:38 PM |
Library Catalog | www.sbicafe.ufv.br |
Language | en |
Abstract | The objective of this study was to establish the Sufficiency Range Approach of both the Foliar (SRAF) and the soil nutrient contents (SRAS) of Conilon coffee trees (Coffea canephora Pierre ex Froehn), cultivated organically in Espírito Santo - Brazil. The nutritional diagnosis using Diagnosis Recommendation Integrated System (DRIS) 1and SRAF, was also compared. The nutrient contents of the leaves and soil were evaluated in 56 organic crops. To establish SRAF and SRAS, the foliar and the soil nutrient contents was used respectively, from 22 crops with high yield (equal or above 2,400 kg ha-1 coffee fruit processing). The comparison between DRIS and SRAF was performed through the ordination of the limiting nutrients and qui-square test. Results revealed that SRAF was of: N (g kg-1) 26.2-29.0, P (g kg-1) 1.51-1.75, K (g kg-1) 14.7-18.7, Ca (g kg-1) 12.4-14.6, Mg (g kg-1) 2.92-4.19- 6, S (g kg-1) 1.85-2.33, B (mg kg-1) 45.5-63.5, Cu (mg kg-1) 11.1-21.1, Fe (mg kg-1) 69.2-155.0, Mn (mg kg-1) 49.6-98.2 and Zn (mg kg- 1) 7.83-9.97. The SRAS was of: P (mg dm-3) 4.67-15.27, K (mg dm-3) 62.7-258.00, Ca (cmolc dm-3) 1.65-3.49, Mg (cmolc dm-3) 0.61- 0.99, S (mg dm-3) 6.94-27.2, B (mg dm-3) 0.43-0.61, Cu (mg dm-3) 0.15-0.43, Fe (mg dm-3) 31.05-100.20, Mn (mg dm-3) 8.78-56.60 and Zn (mg dm-3) 2.35-6.51. In several cases SRAF identified limitations in the organic Conilon coffee productivity that were not identified by DRIS. DRIS indicated limitation when the nutrient was inside of the SRAF. Manganese followed by P, Cu=Fe and N were the nutrients considered as deficient to the yield, when DRIS was used, on the other hand, when the SRAF was used Mn, Ca, Fe and N were considered deficient nutrients. |
Short Title | Nutritional diagnosis of the organic conilon coffee trees (Coffea canephora Pierre ex Froehn) |
Date Added | 10/13/2021, 5:06:38 PM |
Modified | 10/13/2021, 5:06:38 PM |
Type | Journal Article |
---|---|
Author | Yanna Karoline Santos da Costa |
Author | Nagilla Moraes Ribeiro |
Author | Guilherme Cesar Pereira de Moura |
Author | Artur Rodrigues Oliveira |
Author | Silvano Bianco |
Author | Ricardo Alcántara-de la Cruz |
Author | Leonardo Bianco de Carvalho |
URL | https://www.nature.com/articles/s41598-021-87541-z |
Rights | 2021 The Author(s) |
Volume | 11 |
Issue | 1 |
Pages | 8095 |
Publication | Scientific Reports |
ISSN | 2045-2322 |
Date | 2021-04-14 |
Extra | Bandiera_abtest: a Cc_license_type: cc_by Cg_type: Nature Research Journals Number: 1 Primary_atype: Research Publisher: Nature Publishing Group Subject_term: Environmental sciences;Plant sciences Subject_term_id: environmental-sciences;plant-sciences |
Journal Abbr | Sci Rep |
DOI | 10.1038/s41598-021-87541-z |
Accessed | 10/13/2021, 5:07:03 PM |
Library Catalog | www.nature.com |
Language | en |
Abstract | The effect of the phosphorus (P) and glyphosate interactions on the growth and nutrition of Arabica coffee cultivars (Coffea arabica), as well as on the control of Ipomoea grandifolia and Urochloa decumbens, was evaluated. Catuaí-Amarelo/IAC-62 and Catuaí-Vermelho/IAC-144 cultivars did not show glyphosate poisoning, regardless of the soil P content. However, glyphosate reduced the growth of Catuaí-Vermelho/IAC-144. In addition, the soil P content influenced the height, leaf area and dry matter of Catuaí-Amarelo/IAC-62, and the absorption of P and Ca in both cultivars. On the other hand, glyphosate efficiently controlled U. decumbens but not I. grandifolia. Glyphosate effectiveness on I. grandifolia decreased as the soil P content increased. In addition, the soil P content and the glyphosate influenced the P content in I. grandifolia and U. decumbens plants. The soil P content influenced the growth and absorption of other nutrients by coffee plants as well as glyphosate effectiveness on weed control. |
Date Added | 10/13/2021, 5:07:03 PM |
Modified | 10/13/2021, 5:07:03 PM |
Type | Journal Article |
---|---|
Author | P. Vaast |
Author | R. J. Zasoski |
Author | C. S. Bledsoe |
URL | https://doi.org/10.1007/s005720050153 |
Volume | 6 |
Issue | 6 |
Pages | 493-497 |
Publication | Mycorrhiza |
ISSN | 1432-1890 |
Date | 1997-02-01 |
Journal Abbr | Mycorrhiza |
DOI | 10.1007/s005720050153 |
Accessed | 10/13/2021, 5:07:08 PM |
Library Catalog | Springer Link |
Language | en |
Abstract | In a pot experiment, the growth and the nutrient status of in vitro propagated coffee (Coffea arabica L.) microcuttings were investigated for 5 months following vesicular-arbuscular mycorrhizal (VAM) inoculation with either Acaulospora melleae or Glomus clarum at four soil P availabilities. Control plants remained P-deficient even at the highest soil P availability while mycorrhizal plants were P-sufficient at all soil P availabilities. Growth of control plants was only improved at the highest soil P availability. In P-deficient soil, neither of the two VAM species improved plant growth. Plant growth increased by 50% following inoculation with either A. melleae or G. clarum when P availability went from deficient to low. No further plant growth improvement was induced by either VAM species at intermediate and high soil P levels. Nevertheless, growth of plants inoculated with G. clarum was still significantly greater than that of non-mycorrhizal plants at the highest soil P availability. Root colonization by G. clarum increased with increasing soil P availability while root colonization by A. mellea decreased with soil P level increasing above low P availability. Soil P availability also affected Zn nutrition through its influence on VAM symbiosis. With increasing soil P availability, foliar Zn status increased with G. clarum or decreased with A. mellea in parallel to root colonization by VAM. This study demonstrates the beneficial effects of VAM inoculation on in vitro propagated Arabica coffee microcuttings, as shown previously for seedlings. This study also demonstrates differences in tolerance to soil P availability between VAM species, most likely resulting from their differing abilities to enhance coffee foliar P status. |
Date Added | 10/13/2021, 5:07:08 PM |
Modified | 10/13/2021, 5:07:08 PM |
Type | Journal Article |
---|---|
Author | Girum Habte |
Author | In Min Hwang |
Author | Jae Sung Kim |
Author | Joon Ho Hong |
Author | Young Sin Hong |
Author | Ji Yeon Choi |
Author | Eun Yeong Nho |
Author | Nargis Jamila |
Author | Naeem Khan |
Author | Kyong Su Kim |
URL | https://www.sciencedirect.com/science/article/pii/S030881461630869X |
Volume | 212 |
Pages | 512-520 |
Publication | Food Chemistry |
ISSN | 0308-8146 |
Date | December 1, 2016 |
Journal Abbr | Food Chemistry |
DOI | 10.1016/j.foodchem.2016.05.178 |
Accessed | 10/13/2021, 5:08:03 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | This study was aimed to establish the elemental profiling and provenance of coffee samples collected from eleven major coffee producing regions of Ethiopia. A total of 129 samples were analyzed for forty-five elements using inductively coupled plasma (ICP)-optical emission spectroscopy (OES), ICP-mass spectrometry (MS) and direct mercury analyzer (DMA). Among the macro elements, K showed the highest levels whereas Fe was found to have the lowest concentration values. In all the samples, Ca, K, Mg, P and S contents were statistically significant (p<0.05). Micro elements showed the concentrations order of: Mn>Cu>Sr>Zn>Rb>Ni>B. Contents of the trace elements were lower than the permissible standard values. Inter-regions differentiation by cluster analysis (CA), linear discriminant analysis (LDA) and principal component analysis (PCA) showed that micro and trace elements are the best chemical descriptors of the analyzed coffee samples. |
Date Added | 10/13/2021, 5:08:03 PM |
Modified | 10/13/2021, 5:08:03 PM |
Type | Journal Article |
---|---|
Author | Vinícius Jose Ribeiro |
Author | Felipe Vaz Andrade |
Author | Renato Ribeiro Passos |
Author | Eduardo Sa Mendonca |
Author | Lais Lemos da Silva |
Author | Amanda Fae Sartori |
URL | https://search.informit.org/doi/abs/10.3316/informit.135516044186485 |
Rights | © Southern Cross Journals, 2016 |
Publication | Australian Journal of Crop Science |
Date | 2016-04 |
Loc. in Archive | world |
Accessed | 10/13/2021, 5:08:23 PM |
Library Catalog | search.informit.org |
Language | EN |
Abstract | Currently there is interest in aggregating technology to fertilizers in order to increase their efficiency. A good example is the use of slow and steady release nitrogen fertilizers. This study was... |
Date Added | 10/13/2021, 5:08:23 PM |
Modified | 10/13/2021, 5:08:23 PM |
Type | Journal Article |
---|---|
Author | Abayneh Melke |
Author | Fisseha Ittana |
Volume | 5 |
Pages | 400-418 |
Publication | American Journal of Experimental Agriculture |
Date | January 10, 2014 |
Journal Abbr | American Journal of Experimental Agriculture |
DOI | 10.9734/AJEA/2015/12510 |
Library Catalog | ResearchGate |
Abstract | The bulk of coffee soils in southwestern and southern regions of Ethiopia are classified as Nitto sols, which are highly weathered and originate from volcanic rock. These soils are deep and well drained having a pH of 5-6, and have medium to high contents of most of the essential elements except nitrogen and phosphorus. Also, most of the coffee plantations are often managed with shade trees in small scale, with minimal fertilization; litter fall and decomposition play an important role in nitrogen cycling and maintenance of soil fertility. The amount of plant nutrient required by coffee trees may vary depending on several factors. the amount and distribution of rainfall, the species and amount of other plants grown in association with the coffee trees, seasonal variation, topography, soil type and the prevailing cultural practices. Proper coffee nutrition requires special attention of the grower because it affects bean size (grade), bean quality and the overall productivity of the crop that determines marketability. Nutrients are applied to replenish those that are lost through tissue formation, yields, leaching and those that form compounds where they cannot be easily extracted by roots. This calls for application of mineral fertilizers and/or organic Review Article Melke and Ittana; AJEA, 5(5): 400-418, 2015; Article no.AJEA.2015.041 401 manures so as to apply the necessary nutrients in the required amounts. As a result it was possible to come out with a set of recommendations that are of immense value to the growers. Therefore, the objective of this paper is to review the achievements and constraints of mineral fertilization and the potential to use of organic/bio-fertilizers for the present and future coffee production in Ethiopia. |
Short Title | Nutritional Requirement and Management of Arabica Coffee (Coffea arabica L.) in Ethiopia |
Date Added | 10/13/2021, 5:09:14 PM |
Modified | 10/13/2021, 5:09:14 PM |
Type | Journal Article |
---|---|
Author | Fábio M. DaMatta |
Author | Cláudio P. Ronchi |
Author | Moacyr Maestri |
Author | Raimundo S. Barros |
URL | http://www.scielo.br/j/bjpp/a/xSBXnvrDDczyDbBtzspGs3v/abstract/?format=html&stop=next&lang=en |
Volume | 19 |
Pages | 485-510 |
Publication | Brazilian Journal of Plant Physiology |
ISSN | 1677-9452 |
Date | 2007-12 |
Extra | Publisher: Brazilian Journal of Plant Physiology |
Journal Abbr | Braz. J. Plant Physiol. |
DOI | 10.1590/S1677-04202007000400014 |
Accessed | 10/13/2021, 5:24:45 PM |
Library Catalog | SciELO |
Language | en |
Abstract | After oil, coffee is the most valuable traded commodity worldwide. In this review we highlighted some aspects of coffee growth and development in addition to focusing our attention on recent advances on the (eco)physiology of production in both Coffea arabica and C. canephora, which together account for 99% of the world coffee bean production. This review is organized into sections dealing with (i) climatic factors and environmental requirements, (ii) root and shoot growth, (iii) blossoming synchronisation, fruiting and cup quality, (iv) competition between vegetative and reproductive growth and branch die-back, (v) photosynthesis and crop yield, (vi) physiological components of crop yield, (vii) shading and agroforestry systems, and (viii) high-density plantings. |
Date Added | 10/13/2021, 5:24:45 PM |
Modified | 10/13/2021, 5:24:45 PM |
Type | Journal Article |
---|---|
Author | Fábio M. DaMatta |
Author | José D. Cochicho Ramalho |
URL | http://www.scielo.br/j/bjpp/a/bDfpJwLr4xLcznSwy4b9zkf/abstract/?lang=en |
Volume | 18 |
Pages | 55-81 |
Publication | Brazilian Journal of Plant Physiology |
ISSN | 1677-9452 |
Date | 2006-03 |
Extra | Publisher: Brazilian Journal of Plant Physiology |
Journal Abbr | Braz. J. Plant Physiol. |
DOI | 10.1590/S1677-04202006000100006 |
Accessed | 10/13/2021, 5:25:11 PM |
Library Catalog | SciELO |
Language | en |
Abstract | Overall, drought and unfavourable temperatures are the major climatic limitations for coffee production. These limitations are expected to become increasingly important in several coffee growing regions due to the recognized changes in global climate, and also because coffee cultivation has spread towards marginal lands, where water shortage and unfavourable temperatures constitute major constraints to coffee yield. In this review, we examine the impacts of such limitations on the physiology, and consequently on the production of mainly Coffea arabica and C. canephora, which account for about 99 % of the world coffee bean production. The first section deals with climatic factors and the coffee plant’s requirements. The importance of controlling oxidative stress for the expression of drought and cold tolerance abilities is emphasized in the second section. In the third section, we examine the impacts of drought on cell-water relations, stomatal behaviour and water use, photosynthesis and crop yield, carbon and nitrogen metabolism, root growth and characteristics, and on drought tolerance. In the fourth section, the impacts of low positive and high temperatures on coffee physiology are discussed; some insights about effects of negative temperatures are also presented. Finally, the last section deals with shading in harsh environments as a mean of buffering climatic fluctuations, as well as of increasing environmental sustainability in coffee exploitation. |
Short Title | Impacts of drought and temperature stress on coffee physiology and production |
Date Added | 10/13/2021, 5:25:11 PM |
Modified | 10/13/2021, 5:25:11 PM |
Type | Journal Article |
---|---|
Author | Fábio M DaMatta |
URL | https://www.sciencedirect.com/science/article/pii/S0378429003001977 |
Volume | 86 |
Issue | 2 |
Pages | 99-114 |
Publication | Field Crops Research |
ISSN | 0378-4290 |
Date | March 10, 2004 |
Journal Abbr | Field Crops Research |
DOI | 10.1016/j.fcr.2003.09.001 |
Accessed | 10/13/2021, 5:25:15 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | The ecophysiological constraints on the production of the arabica and robusta coffee under shading or full sunlight are reviewed. These two species, which account for almost all the world’s production, were originally considered shade-obligatory, although unshaded plantations may out-yield shaded ones. As a rule, the benefits of shading increase as the environment becomes less favorable for coffee cultivation. Biennial production and branch die-back, which are strongly decreased under shading, are discussed. The relationships between gas exchange performance and key environmental factors are emphasized. Ecophysiological aspects of high density plantings are also examined. |
Short Title | Ecophysiological constraints on the production of shaded and unshaded coffee |
Date Added | 10/13/2021, 5:25:15 PM |
Modified | 10/13/2021, 5:25:15 PM |
Type | Journal Article |
---|---|
Author | Alena Torres Netto |
Author | Eliemar Campostrini |
Author | Jurandi Gonçalves de Oliveira |
Author | Ricardo Enrique Bressan-Smith |
URL | https://www.sciencedirect.com/science/article/pii/S030442380400189X |
Volume | 104 |
Issue | 2 |
Pages | 199-209 |
Publication | Scientia Horticulturae |
ISSN | 0304-4238 |
Date | March 30, 2005 |
Journal Abbr | Scientia Horticulturae |
DOI | 10.1016/j.scienta.2004.08.013 |
Accessed | 10/13/2021, 5:25:18 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | The chlorophyll meter (SPAD-502) is a simple, portable diagnostic tool that measures the greenness or relative content of leaves. Compared to the traditional destructive methods, the use of this equipment saves time, space and resources. The objective of this study was to establish a correlation between the photosynthetic pigments content extracted in DMSO, the total nitrogen content and the chlorophyll a fluorescence variables with the SPAD-502 readings in Coffea canephora Pierre leaves. The SPAD-502 has been shown to be a good tool to diagnose the integrity of the photosynthetic system in coffee leaves, and can thus help in the advanced interpretations of the photochemical process of these plants. The SPAD readings lower 40 show impairment in photosynthetic process. Thus, the portable chlorophyll SPAD-502 can be used to analyze the photosynthetic pigments, and total nitrogen can also help in interpretation of the photochemical process in coffee plants. |
Date Added | 10/13/2021, 5:25:18 PM |
Modified | 10/13/2021, 5:25:18 PM |
Type | Journal Article |
---|---|
Author | Ana Lúcia S Lima |
Author | Fábio M DaMatta |
Author | Hugo A Pinheiro |
Author | Marcos R Totola |
Author | Marcelo E Loureiro |
URL | https://www.sciencedirect.com/science/article/pii/S0098847201001307 |
Volume | 47 |
Issue | 3 |
Pages | 239-247 |
Publication | Environmental and Experimental Botany |
ISSN | 0098-8472 |
Date | May 1, 2002 |
Journal Abbr | Environmental and Experimental Botany |
DOI | 10.1016/S0098-8472(01)00130-7 |
Accessed | 10/13/2021, 5:25:20 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | The effects of water deficit on photochemical parameters and activities of superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX), as well as, cellular damages were investigated in two clones of Coffea canephora differing in drought tolerance. After 6 days without irrigation, predawn leaf water potential fell to −3.0 MPa that was accompanied by the suppression of net photosynthesis in both clones. The variable to maximum chlorophyll fluorescence ratio remained unchanged regardless of the imposed treatments. Both clones showed a similar decline (about 25%) in the photochemical quenching coefficient, but only the drought-sensitive clone exhibited an enhancement (31%) of thermal deactivation under water deficit conditions. The quantum yield of electron transport decreased similarly in both genotypes. Under drought conditions, activities of SOD, CAT and APX increased to a greater extent in the drought-tolerant clone than in the drought-sensitive one. This seemed to be matched with higher protection against oxidative stress, as judged from the lower levels of lipid peroxidation and electrolyte leakage in the drought-tolerant clone. Thus, the ability to increase the antioxidant system activity in order to limit cellular damages might be an important attribute linked to the drought tolerance in C. canephora. |
Date Added | 10/13/2021, 5:25:20 PM |
Modified | 10/13/2021, 5:25:20 PM |
Type | Journal Article |
---|---|
Author | HUGO A. PINHEIRO |
Author | FÁBIO M. DaMATTA |
Author | AGNALDO R. M. CHAVES |
Author | MARCELO E. LOUREIRO |
Author | CARLOS DUCATTI |
URL | https://doi.org/10.1093/aob/mci154 |
Volume | 96 |
Issue | 1 |
Pages | 101-108 |
Publication | Annals of Botany |
ISSN | 0305-7364 |
Date | July 1, 2005 |
Journal Abbr | Annals of Botany |
DOI | 10.1093/aob/mci154 |
Accessed | 10/13/2021, 5:25:24 PM |
Library Catalog | Silverchair |
Abstract | • Background and Aims Drought is a major environmental constraint affecting growth and production of Coffea canephora. Selection of C. canephora clones has been largely empirical as little is known about how clones respond physiologically to drought. Using clones previously shown to differ in drought tolerance, this study aimed to identify the extent of variation of water use and the mechanisms responsible, particularly those associated morphological traits.• Methods Clones (14 and 120, drought-tolerant; 46 and 109A, drought-sensitive, based on their abilities to yield under drought) were grown in 120-L pots until they were 12-months old, when an irrigation and a drought treatment were applied; plants were droughted until the pressure potential (ψx) before dawn (pre-dawn) reached −3·0 MPa. Throughout the drought period, ψx and stomatal conductance (gs) were measured. At the end of the experiment, carbon isotope ratio and parameters from pressure–volume curves were estimated. Morphological traits were also assessed.• Key Results and Conclusions With irrigation, plant hydraulic conductance (KL), midday ψx and total biomass were all greater in clones 109A and 120 than in the other clones. Root mass to leaf area ratio was larger in clone 109A than in the others, whereas rooting depth was greater in drought-tolerant than in drought-sensitive clones. Predawn ψx of −3·0 MPa was reached fastest by 109A, followed progressively by clones 46, 120 and 14. Decreases in gs with declining ψx, or increasing evaporative demand, were similar for clones 14, 46, and 120, but lower in 109A. Carbon isotope ratio increased under drought; however, it was lower in 109A than in other clones. For all clones, ψx, gs and KL recovered rapidly following re-watering. Differences in root depth, KL and stomatal control of water use, but not osmotic or elastic adjustments, largely explained the differences in relative tolerance to drought stress of clones 14 and 120 compared with clones 46 and 109A. |
Date Added | 10/13/2021, 5:25:25 PM |
Modified | 10/13/2021, 5:25:25 PM |
Type | Journal Article |
---|---|
Author | Hugo A. Pinheiro |
Author | Fábio M. DaMatta |
Author | Agnaldo R. M. Chaves |
Author | Elizabeth P. B. Fontes |
Author | Marcelo E. Loureiro |
URL | https://www.sciencedirect.com/science/article/pii/S0168945204002985 |
Volume | 167 |
Issue | 6 |
Pages | 1307-1314 |
Publication | Plant Science |
ISSN | 0168-9452 |
Date | December 1, 2004 |
Journal Abbr | Plant Science |
DOI | 10.1016/j.plantsci.2004.06.027 |
Accessed | 10/13/2021, 5:25:25 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | Four clones of Coffea canephora (Robusta coffee) representing drought-tolerant (14 and 120) and drought-sensitive (46 and 109A) genotypes were submitted to slowly imposed water deficit, until predawn leaf water potential approximately −3.0MPa was reached. Drought-tolerant clones were better able to maintain their leaf water status than drought-sensitive clones after withholding irrigation. Regardless of the clones investigated, the net carbon assimilation rate decreased under drought stress, but little or no effect of drought on the quantum yield of electron transport was observed. The photosynthetic apparatus of clone 120 was more tolerant to both drought and paraquat-mediated oxidative stress, with no clear distinction amongst the other clones in this regard. Drought triggered increases in superoxide dismutase (clones 109A and 120), ascorbate peroxidase (clones 14, 46 and 109A), catalase and guaiacol peroxidase (clones 46 and 109A), and also in glutathione reductase (clone 46) and dehydroascorbate reductase (clone 109A). Activity of monodehydroascorbate reductase was not induced in drought-stressed plants. Maximal catalytic activities of the two last enzymes were much lower than that of ascorbate peroxidase, irrespective of the clone investigated. No drought-induced decrease in enzyme activity was found, except for glutathione reductase in clone 120. In any case, oxidative damage appeared to be evident only in clone 109A. A general link between protection against oxidative stress with differences in clonal tolerance to drought was not observed. |
Date Added | 10/13/2021, 5:25:25 PM |
Modified | 10/13/2021, 5:25:25 PM |
Type | Journal Article |
---|---|
Author | Sidney C. Praxedes |
Author | Fábio M. DaMatta |
Author | Marcelo E. Loureiro |
Author | Maria A. G. Ferrão |
Author | Antônio T. Cordeiro |
URL | https://www.sciencedirect.com/science/article/pii/S0098847205000407 |
Volume | 56 |
Issue | 3 |
Pages | 263-273 |
Publication | Environmental and Experimental Botany |
ISSN | 0098-8472 |
Date | July 1, 2006 |
Journal Abbr | Environmental and Experimental Botany |
DOI | 10.1016/j.envexpbot.2005.02.008 |
Accessed | 10/13/2021, 5:25:27 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | Four clones of robusta coffee representing drought-tolerant (14 and 120) and drought-sensitive (46 and 109A) genotypes were submitted to a slowly imposed water deficit. Sampling and measurements were performed when predawn leaf water potential (Ψpd) approximately −2.0 and −3.0MPa was reached. Regardless of the clone evaluated, drought led to sharper decreases in stomatal conductance than in photosynthesis, which was accompanied by significant declines in internal to ambient CO2 concentration ratio. Little or no effect of drought on chlorophyll a fluorescence parameters was observed. Regardless of the stress intensity, starch decreased remarkably. This was not accompanied by significant changes in concentration of soluble sugars, with the exception of clone 120 in which a rise in sucrose and hexose concentrations was found when Ψpd reached −3.0MPa. At Ψpd=−2.0MPa, activity of acid invertase increased only in clone 120; at Ψpd=−3.0MPa, it increased in clones 14, 46 and 120, while activity of sucrose synthase declined, but only in clone 109A. Drought-induced decrease in ADP-glucose pyrophosphorylase activity was found only in clones 14 and 46, irrespective of stress intensity. At Ψpd=−3.0MPa, maximal extractable and activation state of sucrose-phosphate synthase (SPS) decreased in all clones with the exception of clone 120, in which SPS activity was maintained in parallel to a rising activity of fructose-1,6-bisphosphatase. Changes in SPS activity could neither be explained by the CO2 decrease linked to stomatal closure nor by differences in leaf water status. |
Date Added | 10/13/2021, 5:25:27 PM |
Modified | 10/13/2021, 5:25:27 PM |
Type | Journal Article |
---|---|
Author | Emerson A Silva |
Author | Fábio M DaMatta |
Author | Carlos Ducatti |
Author | Adair J Regazzi |
Author | Raimundo S Barros |
URL | https://www.sciencedirect.com/science/article/pii/S0378429004000796 |
Volume | 89 |
Issue | 2 |
Pages | 349-357 |
Publication | Field Crops Research |
ISSN | 0378-4290 |
Date | October 8, 2004 |
Journal Abbr | Field Crops Research |
DOI | 10.1016/j.fcr.2004.02.010 |
Accessed | 10/13/2021, 5:25:29 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | Seasonal changes in vegetative growth, leaf gas exchanges, carbon isotope discrimination (Δ) and carbohydrate status were monitored in de-fruited coffee trees (Coffea arabica L.) grown in the field, from October 1998 through September 1999, in Viçosa (20°45′S, 42°15′W, 650m a.s.l.), southeastern Brazil. Of the total growth over the 12-month study period, 78% occurred in the warm, rainy season (October–March), and 22% during the cool, dry season (April–September). Throughout the active growth period, the rate of net carbon assimilation (A) averaged 8.6μmolm−2s−1, against 3.4μmolm−2s−1 during the period of reduced growth. In the active period, growth, unlike A or Δ, was strongly negatively correlated with air temperature. In contrast, growth and A were both correlated positively, and Δ correlated negatively, with air temperature during the reduced growth period. However, the depressions of A and growth might have simply run in parallel, without any causal relationship. Changes in A appeared to be largely due to stomatal limitations in the active growing season, with non-stomatal ones prevailing in the slow growth period. Foliar carbohydrates seemed not to have contributed appreciably to changes in growth rates and photosynthesis. |
Date Added | 10/13/2021, 5:25:29 PM |
Modified | 10/13/2021, 5:25:29 PM |
Type | Journal Article |
---|---|
Author | Fábio M. DaMatta |
Author | Roberto L. Cunha |
Author | Werner C. Antunes |
Author | Samuel C. V. Martins |
Author | Wagner L. Araujo |
Author | Alisdair R. Fernie |
Author | Gustavo A. B. K. Moraes |
URL | https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1469-8137.2008.02367.x |
Volume | 178 |
Issue | 2 |
Pages | 348-357 |
Publication | New Phytologist |
ISSN | 1469-8137 |
Date | 2008 |
Extra | _eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-8137.2008.02367.x |
DOI | 10.1111/j.1469-8137.2008.02367.x |
Accessed | 10/13/2021, 5:25:31 PM |
Library Catalog | Wiley Online Library |
Language | en |
Abstract | • Perturbations of the source–sink balances were performed in field-grown coffee (Coffea arabica) trees to investigate the possible role of carbohydrates in feedback regulation of photosynthesis. • Four treatments were applied at the whole-plant level: (i) complete defruiting and maintenance of the full leaf area, (ii) the half crop load and full leaf area, (iii) the full crop load and full leaf area and (iv) the full crop load and half leaf area. Sampling and measurements were performed twice during the phase of dry matter accumulation of fruits. Gas exchange, chlorophyll a fluorescence, carbon isotope labelling and steady-state metabolite measurements were assessed in source leaves. • The average rate of net photosynthetic rate (A) and stomatal conductance (gs) were larger (> 50%), and carbon isotope composition ratio was lower, in trees with a full crop load and half leaf area than in defruited trees, with individuals of the other two treatments showing intermediate values. However, differences in A seem unlikely to have been caused either by photochemical impairments or a direct end-product-mediated feedback down-regulation of photosynthesis. • It is proposed that the decreased A in defruited coffee trees was independent of carbon metabolism and was rather directly related to a lower CO2 availability coupled to lower gs. |
Date Added | 10/13/2021, 5:25:31 PM |
Modified | 10/13/2021, 5:25:31 PM |
Type | Journal Article |
---|---|
Author | Fábio M. DaMatta |
Author | Rodolfo A. Loos |
Author | Emerson A. Silva |
Author | Marcelo E. Loureiro |
URL | https://www.sciencedirect.com/science/article/pii/S0176161704703144 |
Volume | 159 |
Issue | 9 |
Pages | 975-981 |
Publication | Journal of Plant Physiology |
ISSN | 0176-1617 |
Date | January 1, 2002 |
Journal Abbr | Journal of Plant Physiology |
DOI | 10.1078/0176-1617-00807 |
Accessed | 10/13/2021, 5:25:36 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | Plants of C. canephora grown in pots under low nitrogen (LN) or high nitrogen (HN) applications were submitted to either cyclic water stress or daily irrigation. Water deficit led to marked decreases in net carbon assimilation rate (A) and, to a lesser extent, in stomatal conductance (gs), regardless of the N treatments. In well-watered plants, A appreciably increased in HN plants relative to LN plants without significant changes in gs. As a whole, changes in internal CO2 concentration predominantly reflected changes in A rather than in gs. Under irrigated conditions, A, but not gs, correlated with leaf N concentration in a curvilinear way. Photosynthetic nitrogen-use efficiency was considerably low, and decreased with increasing leaf N concentration. Limited N, but not water, slightly decreased the maximum photochemical efficiency of photosystem II (PSII). Under continuous irrigation, LN plants had a smaller quantum yield of electron transport (ϕPSII) through slight decreases of photochemical quenching (qp) and capture efficiency of excitation energy by open PSII reaction centres, and increases in Stern-Volmer non-photochemical quenching. Under water-stressed conditions, changes in PSII photochemistry were apparent only in HN plants, with a 25 % decrease in ϕPSII, due mainly to variations in qp. Biochemical constraints, rather than stomatal or photochemical limitations, provoked the decreases in A under limited supply of either N or water. |
Date Added | 10/13/2021, 5:25:36 PM |
Modified | 10/13/2021, 5:25:36 PM |
Type | Journal Article |
---|---|
Author | Ana S. Fortunato |
Author | Fernando C. Lidon |
Author | Paula Batista-Santos |
Author | António Eduardo Leitão |
Author | Isabel P. Pais |
Author | Ana I. Ribeiro |
Author | José Cochicho Ramalho |
URL | https://www.sciencedirect.com/science/article/pii/S017616170900457X |
Volume | 167 |
Issue | 5 |
Pages | 333-342 |
Publication | Journal of Plant Physiology |
ISSN | 0176-1617 |
Date | March 15, 2010 |
Journal Abbr | Journal of Plant Physiology |
DOI | 10.1016/j.jplph.2009.10.013 |
Accessed | 10/13/2021, 5:25:38 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | Low positive temperature (chilling) is frequently linked to the promotion of oxidative stress conditions, and is of particular importance in the coffee plant due to its severe impact on growth, development, photosynthesis and production. Nevertheless, some acclimation ability has been reported within the Coffea genus, and is possibly related to oxidative stress control. Using an integrated biochemical and molecular approach, the characterization of the antioxidative system of genotypes with different cold acclimation abilities was performed. Experiments were carried out using 1.5-year-old coffee seedlings of Coffea canephora cv. Apoatã, C. arabica cv. Catuaí, C. dewevrei and 2 hybrids, Icatu (C. arabica×C. canephora) and Piatã (C. dewevrei×C. arabica) subjected to a gradual cold treatment and a recovery period. Icatu showed the greatest ability to control oxidative stress, as reflected by the enhancement of several antioxidative components (Cu,Zn-SOD and APX activities; ascorbate, α-tocopherol and chlorogenic acids (CGAs) contents) and lower reactive oxygen species contents (H2O2 and OH). Gene expression studies show that GRed, DHAR and class III and IV chitinases might also be involved in the cold acclimation ability of Icatu. Catuaí showed intermediate acclimation ability through the reinforcement of some antioxidative molecules, usually to a lesser extent than that observed in Icatu. On the other hand, C. dewevrei showed the poorest response in terms of antioxidant accumulation, and also showed the greatest increase in OH values. The difference in the triggering of antioxidative traits supports the hypothesis of its importance to cold (and photoinhibition) tolerance in Coffea sp. and could provide a useful probe to identify tolerant genotypes. |
Date Added | 10/13/2021, 5:25:38 PM |
Modified | 10/13/2021, 5:25:38 PM |
Type | Journal Article |
---|---|
Author | Cláudio P. Ronchi |
Author | Fábio M. DaMatta |
Author | Karine D. Batista |
Author | Gustavo A. B. K. Moraes |
Author | Marcelo E. Loureiro |
Author | Carlos Ducatti |
Author | Cláudio P. Ronchi |
Author | Fábio M. DaMatta |
Author | Karine D. Batista |
Author | Gustavo A. B. K. Moraes |
Author | Marcelo E. Loureiro |
Author | Carlos Ducatti |
URL | https://www.publish.csiro.au/fp/FP06147 |
Volume | 33 |
Issue | 11 |
Pages | 1013-1023 |
Publication | Functional Plant Biology |
ISSN | 1445-4416, 1445-4416 |
Date | 2006/11/01 |
Extra | Publisher: CSIRO PUBLISHING |
Journal Abbr | Functional Plant Biol. |
DOI | 10.1071/FP06147 |
Accessed | 10/13/2021, 5:25:41 PM |
Library Catalog | www.publish.csiro.au |
Language | en |
Abstract | Coffee (Coffea arabica L.) plants were grown in small (3-L), medium (10-L) and large (24-L) pots for 115 or 165 d after transplanting (DAT), which allowed different degrees of root restriction. Effects of altered source : sink ratio were evaluated in order to explore possible stomatal and non-stomatal mechanisms of photosynthetic down-regulation. Increasing root restriction brought about large and general reductions in plant growth associated with a rising root : shoot ratio. Treatments did not affect leaf water potential or leaf nutrient status, with the exception of N content, which dropped significantly with increasing root restriction even though an adequate N supply was available. Photosynthesis was severely reduced when plants were grown in small pots; this was largely associated with non-stomatal factors, such as decreased Rubisco activity. At 165 DAT contents of hexose, sucrose, and amino acids decreased in plants grown in smaller pots, while those of starch and hexose-P increased in plants grown in smaller pots. Photosynthetic rates were negatively correlated with the ratio of hexose to free amino acids, but not with hexose content. Activities of acid invertase, sucrose synthase, sucrose-P synthase, fructose-1,6-bisphosphatase, ADP-glucose pyrophosphorylase, starch phosphorylase, glyceraldehyde-3-P dehydrogenase, PPi : fructose-6-P 1-phosphotransferase and NADP : glyceraldehyde-3-P dehydrogenase all decreased with severe root restriction. Glycerate-3-P : Pi and glucose-6-P : fructose-6-P ratios decreased accordingly. Photosynthetic down-regulation was unlikely to have been associated directly with an end-product limitation, but rather with decreases in Rubisco. Such a down-regulation was largely a result of N deficiency caused by growing coffee plants in small pots. |
Date Added | 10/13/2021, 5:25:41 PM |
Modified | 10/13/2021, 5:25:41 PM |
Extracted Annotations (10/19/2021, 1:03:46 AM)
"By growing clones of C. canephora for 10 months in 6-L pots, Lima et al. (2002) obtained maximal A values of 3 μmol m−2 s−1, whereas Pinheiro et al. (2004) found A values of approximately 10 μmol m−2 s−1 when the same clones were also grown for 10 months in 120-L pots." (p. 1014)
"The photosynthetic response to pot size would also vary depending on how long plants remain containerised. This is particularly important for tree species because in most experiments they are grown in small pots for extended periods." (p. 1014)
"Uniform seedlings of Coffea arabica L. cv Red Catua ́ IAC 44 were transplanted to small pots (SP), medium pots (MP), and large pots (LP), which contained 3, 10, and 24 L, respectively, of a mixture of soil, sand and manure (3 : 1 : 1, v / v / v). The plants were grown in a screen house with walls of coarse mesh screen, which allowed free exchange of air with the external environment." (p. 1014)
"The experimental plot was one plant per pot. The plants were regularly watered and received a maximal photosynthetic photon flux of 1200 μmol m−2 s−1. Supplemental N fertiliser was top-dressed at a rate of 3.0 g (NH4)2SO4 per pot at 45-d intervals, starting on the 15th day after transplanting (DAT)." (p. 1014)
"Root restriction treatments were imposed by growing plants in pots of different sizes for 115 or 165 DAT." (p. 1014)
"At 115 DAT, total shoot dry matter of SP plants was less (48%) than that of MP or LP plants. At 165 DAT, total shoot dry matter was smaller in SP (66%) and MP (23%) plants than in LP individuals. Similar trends were also observed for total leaf area, stem diameter, plant height, number of leaves and plagiotropic branches, and dry matter of stems, petioles and leaves (data not shown)." (p. 1015)
"Specific leaf area was greater in SP plants than in MP and LP plants. This was associated with a reduction in the mesophyll thickness, particularly in spongy parenchyma (data not shown)." (p. 1016)
"Foliar concentrations of essential macroand micronutrients (P, S, K, Ca, Mg, Cu, Zn, Fe, and Mn) did not vary appreciably for plants grown in different pot volumes (data not shown), and were within the optimum range for" (p. 1016)
"coffee. However, total N concentration declined dramatically with decreasing pot volume." (p. 1016)
"This was particularly evident at 165 DAT when N concentration was lower in both SP (40%) and MP (23%) plants than in LP plants (Table 1)." (p. 1016)
"Leaf w, as measured at either 0700 h (Table 2) or 1300 h (data not shown), was unaffected by pot size, indicating that water status was largely unrelated to changes in growth and photosynthetic performance as associated with rooting restriction." (p. 1016)
"Considering the LP plants as a reference, there were significant decreases in A (58%) and gs (48%), but only in SP plants at 165 DAT (Table 2)." (p. 1017)
"Compared with LP plants, total chlorophyll content decreased (26%) at 115 DAT in SP plants; at 165 DAT, it declined (59%) in these plants and in MP plants (20%) (Table 1)." (p. 1017)
"Increasing root restriction brought about general and large reductions in plant growth associated with a rising root : shoot ratio." (p. 1020)
"In this study, N, rather than water or any other nutrient, was most likely the limiting factor. Particularly at 165 DAT, leaf N concentration was near or below 23 g kg−1 DM in SP and MP plants, a mean value at which visual symptoms of N deficiency start appearing in coffee (Moraes 1981)." (p. 1020)
"It should be stressed that the substrate of the small pots contained ∼5.5 g N at the experiment onset and 2.5 g N per plant were applied throughout the experiment. Thus, the overall amount of N in the small pots was considerably larger than the amount expected to be taken up during the six month experiment by a coffee seedling grown without physical limitation to root development (∼1.0 g N; Instituto Brasileiro do Caf ́e 1985)." (p. 1020)
"As a consequence, much of the growth and photosynthesis responses related to decreasing pot size were, indeed, a reflection of N deficiency." (p. 1020)
"Changes in root morphology in favour of shorter and thicker roots were visually observed with smaller pots." (p. 1020)
"Results from this study showed that source : sink imbalance imposed by root restriction severely reduced photosynthesis in coffee plants." (p. 1020)
"Thus, it follows that photosynthetic acclimation of plants grown in limiting pot sizes was largely a consequence of N limitation. From this perspective, down-regulation of photosynthesis was a result of an inadequate leaf N status even though an appropriate N supply was available." (p. 1022)
Type | Journal Article |
---|---|
Author | Fábio M Da Matta |
Author | José A. T do Amaral |
Author | Alemar B Rena |
URL | https://www.sciencedirect.com/science/article/pii/S0378429098001270 |
Volume | 60 |
Issue | 3 |
Pages | 223-229 |
Publication | Field Crops Research |
ISSN | 0378-4290 |
Date | February 1, 1999 |
Journal Abbr | Field Crops Research |
DOI | 10.1016/S0378-4290(98)00127-0 |
Accessed | 10/13/2021, 5:25:44 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | Vegetative growth of branches and leaf area gain in field-grown Arabica coffee trees in Viçosa, southeastern Brazil, exhibited active and quiescent phases. Nitrogen supplementation during the cool season did not prevent growth decline, nor did it alter the overall pattern of the tree growth; however, it enabled the plants to grow faster following the quiescent growth phase. Growth was related poorly to both nitrate content and nitrate reductase activity in leaves. In roots, N-fertilization in addition to accounting for greater content of nitrate, amino acids and ammonium was also associated with the maintenance of the nitrate reductase activity, but nitrate reduction was apparently nil in leaves during most of the cool season. |
Date Added | 10/13/2021, 5:25:44 PM |
Modified | 10/13/2021, 5:25:44 PM |
Type | Journal Article |
---|---|
Author | P. Batista-Santos |
Author | F. C. Lidon |
Author | A. Fortunato |
Author | A. E. Leitão |
Author | E. Lopes |
Author | F. Partelli |
Author | A. I. Ribeiro |
Author | J. C. Ramalho |
URL | https://www.sciencedirect.com/science/article/pii/S0176161710005675 |
Volume | 168 |
Issue | 8 |
Pages | 792-806 |
Publication | Journal of Plant Physiology |
ISSN | 0176-1617 |
Date | May 15, 2011 |
Journal Abbr | Journal of Plant Physiology |
DOI | 10.1016/j.jplph.2010.11.013 |
Accessed | 10/13/2021, 5:25:47 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | Environmental constraints disturb plant metabolism and are often associated with photosynthetic impairments and yield reductions. Among them, low positive temperatures are of up most importance in tropical plant species, namely in Coffea spp. in which some acclimation ability has been reported. To further explain cold tolerance, the impacts on photosynthetic functioning and the expression of photosynthetic-related genes were analyzed. The experiments were carried out along a period of slow cold imposition (to allow acclimation), after chilling (4°C) exposure and in the following rewarming period, using 1.5-year-old coffee seedlings of 5 genotypes with different cold sensitivity: Coffea canephora cv. Apoatã, Coffea arabica cv. Catuaí, Coffea dewevrei and 2 hybrids, Icatu (C. arabica×C. canephora) and Piatã (C. dewevrei×C. arabica). All genotypes suffered a significant leaf area loss only after chilling exposure, with Icatu showing the lowest impact, a first indication of a higher cold tolerance, contrasting with Apoatã and C. dewevrei. During cold exposure, net photosynthesis and Chl a fluorescence parameters were strongly affected in all genotypes, but stomatal limitations were not detected. However, the extent of mesophyll limitation, reflecting regulatory mechanisms and/or damage, was genotype dependent. Overnight retention of zeaxanthin was common to Coffea genotypes, but the accumulation of photoprotective pigments was highest in Icatu. That down-regulated photochemical events but efficiently protected the photosynthetic structures, as shown, e.g., by the lowest impacts on Amax and PSI activity and the strongest reinforcement of PSII activity, the latter possibly reflecting the presence of a photoprotective cycle around PSII in Icatu (and Catuaí). Concomitant to these protection mechanisms, Icatu was the sole genotype to present simultaneous upregulation of caCP22, caPI and caCytf, related to, respectively, PSII, PSI and to the complex Cytb6/f, which could promote better repair ability, contributing to the maintenance of efficient thylakoid functioning. We conclude that Icatu showed the best acclimation ability among the studied genotypes, mostly due to a better upregulation of photoprotection and repair mechanisms. We confirmed the presence of important variability in Coffea spp. that could be exploited in breeding programs, which should be assisted by useful markers of cold tolerance, namely the upregulation of antioxidative molecules, the expression of selected genes and PSI sensitivity. |
Date Added | 10/13/2021, 5:25:47 PM |
Modified | 10/13/2021, 5:25:47 PM |
Type | Journal Article |
---|---|
Author | J. C. Ramalho |
Author | F. M. DaMatta |
Author | A. P. Rodrigues |
Author | P. Scotti-Campos |
Author | I. Pais |
Author | P. Batista-Santos |
Author | F. L. Partelli |
Author | A. Ribeiro |
Author | F. C. Lidon |
Author | A. E. Leitão |
URL | https://doi.org/10.1007/s40626-014-0001-7 |
Volume | 26 |
Issue | 1 |
Pages | 5-18 |
Publication | Theoretical and Experimental Plant Physiology |
ISSN | 2197-0025 |
Date | 2014-03-01 |
Journal Abbr | Theor. Exp. Plant Physiol |
DOI | 10.1007/s40626-014-0001-7 |
Accessed | 10/13/2021, 5:25:49 PM |
Library Catalog | Springer Link |
Language | en |
Abstract | Climate changes implicate an increase in climate instability and the occurrence of extreme temperature in the environment. In this context, the differential triggering of cold tolerance mechanisms among coffee plants, highlighting the existence of important genetic variability, is of up most importance to be exploited in genotype screening and breeding programs. This review deals with the identification and triggering of acclimation mechanisms that shield key functions and structures of photosynthesis, with a particular emphasis on experiments under environmental controlled conditions. These mechanisms allow plants to perform metabolic and structural adjustments, particularly under conditions of a gradual cold exposure, simulating the effects happening in the field under cold periods. Detailed attention is given to the strengthening of the antioxidative system and to the dynamics of the lipid matrix components in chloroplast membranes, since they were found to constitute crucial traits to an effective long-term acclimation and, therefore, to guarantee the economic sustainability of this important tropical cash crop, particularly in cultivation areas prone to the occurrence of low positive temperatures. |
Date Added | 10/13/2021, 5:25:49 PM |
Modified | 10/13/2021, 5:25:49 PM |
Type | Journal Article |
---|---|
Author | Karine D. Batista |
Author | Wagner L. Araújo |
Author | Werner C. Antunes |
Author | Paulo C. Cavatte |
Author | Gustavo A. B. K. Moraes |
Author | Samuel C. V. Martins |
Author | Fábio M. DaMatta |
URL | https://doi.org/10.1007/s00468-011-0606-2 |
Volume | 26 |
Issue | 2 |
Pages | 459-468 |
Publication | Trees |
ISSN | 1432-2285 |
Date | 2012-04-01 |
Journal Abbr | Trees |
DOI | 10.1007/s00468-011-0606-2 |
Accessed | 10/13/2021, 5:25:51 PM |
Library Catalog | Springer Link |
Language | en |
Abstract | It has long been held that the regulation of photosynthesis in source leaves may be controlled by carbohydrates. The mechanisms that govern the diurnal fluctuation of photosynthesis and the potential role of feedback regulation by carbohydrates during photosynthesis in coffee (Coffea arabica) leaves were investigated in three independent and complementary experiments. An integrative approach using gas exchange measurements in addition to carbon isotope labelling and steady-state carbohydrate and amino acid analysis was performed. Canonical correlation analysis was also performed. In field-grown plants under naturally fluctuating environmental conditions (Experiment I), the overall pattern of gas exchange was characterised by both low stomatal conductance (gs) and net carbon assimilation rate (A) in the afternoon; no apparent signs of photoinhibition were observed. Under conditions of low air evaporative demand (Experiment II), only slight decreases (~20%) in A were observed at the end of the day, which were associated with a reduction (~35%) in gs. For both conditions, any increase in carbohydrate and amino acid pools over the course of the day was small. In leaves from girdled branches (Experiment III), a remarkable decrease in A and particularly in gs was observed, as were increases in starch but not in hexoses and sucrose pools. Furthermore, the rate of 14CO2 uptake (assessed under saturating CO2 conditions) and the partitioning of recently fixed 14C were not affected by girdling. It is proposed that the diurnal oscillations in A and the differences in A in leaves from girdled and non-girdled branches were merely a consequence of diffusive limitations rather than from photochemical constraints or direct metabolite-mediated down-regulation of photosynthesis. |
Date Added | 10/13/2021, 5:25:51 PM |
Modified | 10/13/2021, 5:25:51 PM |
Type | Journal Article |
---|---|
Author | Raimundo S. Barros |
Author | Jay Wallace da S.e Mota |
Author | Fábio M. Da Matta |
Author | Moacyr Maestri |
URL | https://www.sciencedirect.com/science/article/pii/S0378429097000452 |
Volume | 54 |
Issue | 1 |
Pages | 65-72 |
Publication | Field Crops Research |
ISSN | 0378-4290 |
Date | August 1, 1997 |
Journal Abbr | Field Crops Research |
DOI | 10.1016/S0378-4290(97)00045-2 |
Accessed | 10/13/2021, 5:25:55 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | The decline of vegetative growth of Arabica coffee trees in Viçosa (20° 45′ S, 650 m altitude), Brazil, occurring from mid-March through late May, was observed in both irrigated and non-irrigated plants and did not show a direct relation with leaf water potential. Declining growth coincided with lowering temperatures, and particularly with increasing daily periods with low temperatures. Stomatal conductances in the morning (0800–0900 h) were relatively high until mid-March and decreased gradually in parallel with declining growth rates. During the quiescent growth phase in the cool season, starting from late May, stomata were closed for most of the diurnal period. |
Date Added | 10/13/2021, 5:25:55 PM |
Modified | 10/13/2021, 5:25:55 PM |
Type | Journal Article |
---|---|
Author | José C. Ramalho |
Author | Thijs L. Pons |
Author | Henri W. Groeneveld |
Author | M. Antonieta Nunes |
URL | https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1399-3054.1997.tb01841.x |
Volume | 101 |
Issue | 1 |
Pages | 229-239 |
Publication | Physiologia Plantarum |
ISSN | 1399-3054 |
Date | 1997 |
Extra | _eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1399-3054.1997.tb01841.x |
DOI | 10.1111/j.1399-3054.1997.tb01841.x |
Accessed | 10/13/2021, 5:25:58 PM |
Library Catalog | Wiley Online Library |
Language | en |
Abstract | It is known that the coffee (Coffea arabica L.) plant which is originally from shade habitats would have a limited ability to grow under full sun. Previous work has shown that nitrogen fertilisation can reduce the leaf damage when the plants are exposed to high light intensities during several days. In the present work we aimed to study the effects of the high irradiance during the first hours and evaluate the positive contribution of nitrogen fertilisation in the case of short-term exposure to strong light. Young plants (1.5–2 years old) grown in 1.5 kg of a mixed soil were supplemented with a nutrient solution containing 15 mM nitrogen in the form of NH4NO3, every 7 days (2N treatment), 15 days (1N treatment) and 45 days (0N treatment). Top mature leaves were exposed to a photosynthetic photon flux density of 1 500 μmol m−2 s−1 for a maximal period of 8 h, and changes in photosynthesis and pigment composition were monitored along the period of high light exposure. Photosynthetic capacity, leaf conductance to water vapour, electron transport capacity and maximum carboxylation activity, as well as some leaf fluorescence parameters (minimal fluorescence, photochemical efficiency of PSII and quantum yield of photosynthetic electron transport) were reduced by the stress, with a generally stronger impact observed in the 0N plants. The photochemical quenching was affected only in the 0N plants, while the non-photochemical quenching increased in 2N plants but decreased in the 0N ones. The results showed that 2N plants presented a better initial status of the photosynthetic parameters and of the content of photoprotective pigments. Those plants showed ability to trigger some protective mechanisms, as observed by the tendency to increase the xanthophyll pool content, specially in zeaxanthin and in non-photochemical quenching. Also, protein content presented a tendency to increase after 1.5 h, which was maintained until the end of the high light period. We conclude that nitrogen availability is a key factor in the acclimation process to high light. |
Date Added | 10/13/2021, 5:25:58 PM |
Modified | 10/13/2021, 5:25:58 PM |
Type | Journal Article |
---|---|
Author | Marcelo F. Pompelli |
Author | Samuel C. V. Martins |
Author | Werner C. Antunes |
Author | Agnaldo R. M. Chaves |
Author | Fábio M. DaMatta |
URL | https://www.sciencedirect.com/science/article/pii/S0176161710000970 |
Volume | 167 |
Issue | 13 |
Pages | 1052-1060 |
Publication | Journal of Plant Physiology |
ISSN | 0176-1617 |
Date | September 1, 2010 |
Journal Abbr | Journal of Plant Physiology |
DOI | 10.1016/j.jplph.2010.03.001 |
Accessed | 10/13/2021, 5:26:00 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | Coffee is native to shady environments but often grows better and produces higher yields without shade, though at the expense of high fertilization inputs, particularly nitrogen (N). Potted plants were grown under full sunlight and shade (50%) conditions and were fertilized with nutrient solutions containing either 0 or 23mMN. Measurements were made in southeastern Brazil during winter conditions, when relatively low night temperatures and high diurnal insolation are common. Overall, the net carbon assimilation rate was quite low, which was associated with diffusive, rather than biochemical, constraints. N deficiency led to decreases in the concentrations of chlorophylls (Chl) and total carotenoids as well as in the Chl/N ratio. These conditions also led to qualitative changes in the carotenoid composition, e.g., increased antheraxanthin (A) and zeaxanthin (Z) pools on a Chl basis, particularly at high light, which was linked to increased thermal dissipation of absorbed light. The variable-to-maximum fluorescence ratio at predawn decreased with increasing A+Z pools and decreased linearly with decreasing N. We showed that this ratio was inadequate for assessing photoinhibition under N limitation. Expressed per unit mass, the activities of superoxide dismutase and glutathione reductase were not altered with the treatments. In contrast, ascorbate peroxidase activity was lower in low N plants, particularly under shade, whereas catalase activity was lower in shaded plants than in sun-grown plants, regardless of the N level. Glutamine synthetase activity was greater in sun-grown plants than in shaded individuals at a given N level and decreased with decreasing N application. Our results suggest that the photoprotective and antioxidant capacity per amount of photons absorbed was up-regulated by a low N supply; nevertheless, this capacity, regardless of the light conditions, was not enough to prevent oxidative damage, as judged from the increases in the H2O2 and malondialdehyde concentrations and electrolyte leakage. We demonstrated that N fertilization could adequately protect the coffee plants against photodamage independently of the anticipated positive effects of N on the photosynthetic capacity. |
Date Added | 10/13/2021, 5:26:00 PM |
Modified | 10/13/2021, 5:26:00 PM |
Type | Journal Article |
---|---|
Author | Paulo C. Cavatte |
Author | Álvaro A. G. Oliveira |
Author | Leandro E. Morais |
Author | Samuel C. V. Martins |
Author | Lílian M. V. P. Sanglard |
Author | Fábio M. DaMatta |
URL | https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1399-3054.2011.01525.x |
Volume | 144 |
Issue | 2 |
Pages | 111-122 |
Publication | Physiologia Plantarum |
ISSN | 1399-3054 |
Date | 2012 |
Extra | _eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1399-3054.2011.01525.x |
DOI | 10.1111/j.1399-3054.2011.01525.x |
Accessed | 10/13/2021, 5:26:01 PM |
Library Catalog | Wiley Online Library |
Language | en |
Abstract | Based on indirect evidence, it was previously suggested that shading could attenuate the negative impacts of drought on coffee (Coffea arabica), a tropical crop species native to shady environments. A variety (47) of morphological and physiological traits were examined in plants grown in 30-l pots in either full sunlight or 85% shade for 8 months, after which a 4-month water shortage was implemented. Overall, the traits showed weak or negligible responses to the light × water interaction, explaining less than 10% of the total data variation. Only slight variations in biomass allocation were observed in the combined shade and drought treatment. Differences in relative growth rates were mainly associated with physiological and not with morphological adjustments. In high light, drought constrained the photosynthetic rate through stomatal limitations with no sign of apparent photoinhibition; in low light, such constraints were apparently linked to biochemical factors. Sun-grown plants displayed osmotic adjustments, decreased tissue elasticities and improved long-term water use efficiencies, especially under drought. Regardless of the water availability, higher concentrations of lipids, total phenols, total soluble sugars and lignin were found in high light compared to shade conditions, in contrast to the effects on cellulose and hemicellulose concentrations. Proline concentrations increased in water-deprived plants, particularly those grown under full sun. Phenotypic plasticity was much higher in response to the light than to the water supply. Overall, shading did not alleviate the negative impacts of drought on the coffee tree. |
Short Title | Could shading reduce the negative impacts of drought on coffee? |
Date Added | 10/13/2021, 5:26:01 PM |
Modified | 10/13/2021, 5:26:01 PM |
Type | Journal Article |
---|---|
Author | Celso Jamil Marur |
Author | Rogério Teixeira de Faria |
URL | www.redalyc.org/articulo.oa?id=303026570001 |
Volume | 28 |
Issue | 3 |
Pages | 331-336 |
Publication | Acta Sci. Agron. |
Date | 2006 |
DOI | 10.4025/actasciagron.v28i3.941 |
Library Catalog | Zotero |
Language | en |
Abstract | The great variability in income irradiance over a plant canopy makes difficult the comparison of photosynthesis rates among leaves in a plant and their integration. In this study, photosynthetical rates of ten different leaves of a coffee plant were obtained during a day. The daily variation in photosynthetic rates showed a peak between 7:00 h and 9:00 h with higher values measured for the leaves positioned at the sunrise direction and northern orientation. Lower values were consistently observed for leaves at inner position of the plant. After 9:00 h, despite the increase in photosynthetically active radiation, photosynthetic rates decreased steadily to reach negligible values at sunset. The reductions on photosynthesis rates can also be attributed to increasing stomatal resistance. Since number of leaves is highly variable in coffee plants, those results make evident how difficult is to integrate and estimate whole plant photosynthesis by taking the average of 10 leaves. |
Date Added | 10/13/2021, 5:26:27 PM |
Modified | 10/20/2021, 7:07:51 PM |
Type | Journal Article |
---|---|
Author | Fábio Luiz Partelli |
Author | Henrique Duarte Vieira |
Author | Alexandre Pio Viana |
Author | Paula Batista-Santos |
Author | Ana Paula Rodrigues |
Author | António Eduardo Leitão |
Author | José Cochicho Ramalho |
URL | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009001100006&lng=en&tlng=en |
Volume | 44 |
Issue | 11 |
Pages | 1404-1415 |
Publication | Pesquisa Agropecuária Brasileira |
ISSN | 0100-204X |
Date | 11/2009 |
Journal Abbr | Pesq. agropec. bras. |
DOI | 10.1590/S0100-204X2009001100006 |
Accessed | 10/13/2021, 5:26:29 PM |
Library Catalog | DOI.org (Crossref) |
Language | en |
Abstract | The objective of this work was to evaluate photoprotective mechanisms related to low positive temperatures in Coffea canephora (Conilon clones 02 and 153) and C. arabica ('Catucaí' IPR 102) genotypes, involved in cold temperature tolerance. To accomplish this, one‑year‑old plants were successively submitted to: temperature decrease of 0.5ºC day‑1, from 25/20ºC to 13/8ºC; a three‑day chilling cycle at 13/4ºC; and a recovery period of 14 days (25/20ºC). During the experiment, leaf gas exchange, chlorophyll a fluorescence and leaf photosynthetic pigment content were evaluated. Total activity of ribulose‑1,5‑bisphosphate carboxylase/ oxygenase (Rubisco) and ribulose‑5‑phosphate kinase (Ru5PK) were quantified to measure the activity of photosynthesis key enzymes. All genotypes showed low temperature sensitivity, but displayed diverse cold impact and recovery capabilities regarding the photosynthetic‑related parameters studied. Catucaí IPR 102 cultivar showed better ability to cope with cold stress than the Conilon clones, especially Conilon 02, and had full recovery of leaf gas exchange, fluorescence parameters, enzymatic activity, and higher contents of the photoprotective pigments zeaxanthin and lutein. |
Date Added | 10/13/2021, 5:26:30 PM |
Modified | 10/13/2021, 5:26:30 PM |
Type | Journal Article |
---|---|
Author | José A.T. Amaral |
Author | Fábio M. Da Matta |
Author | Alemar B. Rena |
URL | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-31312001000100008&lng=en&tlng=en |
Volume | 13 |
Issue | 1 |
Pages | 66-74 |
Publication | Revista Brasileira de Fisiologia Vegetal |
ISSN | 0103-3131 |
Date | 2001 |
Journal Abbr | Rev. Bras. Fisiol. Veg. |
DOI | 10.1590/S0103-31312001000100008 |
Accessed | 10/13/2021, 5:26:33 PM |
Library Catalog | DOI.org (Crossref) |
Language | en |
Abstract | Active vegetative and reproductive growth in field-grown trees of Coffea arabica L. in Viçosa (20o45’S, 650 m altitude), south-eastern Brazil, occur concurrently. The overall patterns of branch growth and leaf area gain were to a certain extent altered by fruit removal, with growth rates being remarkably greater in de-fruited trees. The content of N-NO3 was not affected by fruiting, whilst that of amino-N was greater in de-fruited than fruiting trees most of the time, but the differences were not large enough to have significantly contributed to the increased growth rates in de-fruited trees. Leaf nitrate reductase activity was greater in plants bearing fruit than in non-bearing ones most of the time; activity was roughly inversely associated with growth. Although the roots contained much more nitrate than the leaves, the root nitrate reductase activity was much lower and not affected by fruiting. Much of the restrictive effects of fruiting on vegetative growth appeared to be associated to starch exhaustion, in addition to the outstanding effect of supra-optimum temperatures per se. |
Date Added | 10/13/2021, 5:26:33 PM |
Modified | 10/13/2021, 5:26:34 PM |
Type | Journal Article |
---|---|
Author | Alejandra Sarmiento-Soler |
Author | Philippe Vaast |
Author | Munir P. Hoffmann |
Author | Laurence Jassogne |
Author | Piet van Asten |
Author | Sophie Graefe |
Author | Reimund P. Rötter |
URL | https://www.sciencedirect.com/science/article/pii/S0167880920300724 |
Volume | 295 |
Pages | 106887 |
Publication | Agriculture, Ecosystems & Environment |
ISSN | 0167-8809 |
Date | June 15, 2020 |
Extra | 00000 |
Journal Abbr | Agriculture, Ecosystems & Environment |
DOI | 10.1016/j.agee.2020.106887 |
Accessed | 10/13/2021, 5:28:59 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | Coffee is a key export commodity of East Africa, but average smallholders’ yields are low. To guide sustainable yield improvements of smallholders’ coffee systems, we investigated coffee yield components in three different types of coffee cropping systems along an altitude gradient (1100−2100 m.a.s.l.) during two production years (2015 and 2016). We selected 810 coffee trees distributed over 27 farms and monitored number of stems per tree, fruit load per branch, productive nodes per branch (on four branches of one stem per tree) and number of productive branches per stem (on one stem per selected tree) in both years. Additionally, we monitored productive stems per ha, coffee tree density and cherry weight in combination with pest and disease occurrence and management information from interviews. Coffee farms were classified as Coffee-Open (CO) (< 20 % shade cover), Coffee-Banana (CB) (coffee dominantly intercropped with bananas) or Coffee-shade Tree (CT) (coffee dominantly intercropped with shade trees). Coffee-Banana had larger yield per ha (green bean kg ha−1) (1086 ± 736 kg ha−1) and yield per stem (green bean kg stem−1) (0.24 ± 0.16 kg stem−1) than CO (670 ± 457 kg ha−1 and 0.21 ± 0.26 kg stem−1) and CT (428 ± 259 kg ha-1 and 0.10 ± 0.12 kg stem−1). Fruit loads, productive nodes, productive branches and cherry weight declined with shade cover, especially for shade cover > 30 %. Additionally, the same yield components correlated negatively with number of stems per tree. Fertilizer and fungicide use were related to more productive branches and cherry weight respectively, and stem borer was identified as the most important pest in this area. Our results suggest that yield in the region could be increased, i) by maintaining shade at an intermediate level, particularly at low and mid altitude and by reducing the number of stems per coffee tree (<4), and ii) by improving soil fertility and protection against pest and disease. |
Date Added | 10/13/2021, 5:28:59 PM |
Modified | 10/19/2021, 2:02:56 AM |
Type | Journal Article |
---|---|
Author | Rodrigo T. Avila |
Author | Samuel C. V. Martins |
Author | Lílian M. V. P. Sanglard |
Author | Martielly S. dos Santos |
Author | Paulo E. Menezes-Silva |
Author | Kelly C. Detman |
Author | Matheus L. Sanglard |
Author | Amanda A. Cardoso |
Author | Leandro E. Morais |
Author | Camilo E. Vital |
Author | Wagner L. Araújo |
Author | Adriano Nunes-Nesi |
Author | Fábio M. DaMatta |
URL | https://doi.org/10.1007/s00468-019-01893-8 |
Volume | 34 |
Issue | 1 |
Pages | 1-16 |
Publication | Trees |
ISSN | 1432-2285 |
Date | 2020-02-01 |
Journal Abbr | Trees |
DOI | 10.1007/s00468-019-01893-8 |
Accessed | 10/13/2021, 5:29:01 PM |
Library Catalog | Springer Link |
Language | en |
Abstract | Leaves were forced to accumulate starch as much as possible but maintained relatively low soluble sugar levels with no evidence of photosynthetic feedback downregulation. |
Date Added | 10/13/2021, 5:29:01 PM |
Modified | 10/13/2021, 5:29:01 PM |
Type | Journal Article |
---|---|
Author | Fábio M. DaMatta |
Author | Eric Rahn |
Author | Peter Läderach |
Author | Raquel Ghini |
Author | José C. Ramalho |
URL | https://doi.org/10.1007/s10584-018-2346-4 |
Volume | 152 |
Issue | 1 |
Pages | 167-178 |
Publication | Climatic Change |
ISSN | 1573-1480 |
Date | 2019-01-01 |
Journal Abbr | Climatic Change |
DOI | 10.1007/s10584-018-2346-4 |
Accessed | 10/13/2021, 5:29:03 PM |
Library Catalog | Springer Link |
Language | en |
Abstract | Coffee, one of the most heavily globally traded agricultural commodities, has been categorized as a highly sensitive plant species to progressive climatic change. Here, we summarize recent insights on the coffee plant’s physiological performance at elevated atmospheric carbon dioxide concentration [CO2]. We specifically (i) provide new data of crop yields obtained under free-air CO2 enrichment conditions, (ii) discuss predictions on the future of the coffee crop as based on rising temperature and (iii) emphasize the role of [CO2] as a key player for mitigating harmful effects of supra-optimal temperatures on coffee physiology and bean quality. We conclude that the effects of global warming on the climatic suitability of coffee may be lower than previously assumed. We highlight perspectives and priorities for further research to improve our understanding on how the coffee plant will respond to present and progressive climate change. |
Date Added | 10/13/2021, 5:29:03 PM |
Modified | 10/13/2021, 5:29:03 PM |
Type | Journal Article |
---|---|
Author | Rodrigo T. Avila |
Author | Amanda A. Cardoso |
Author | Wellington L. de Almeida |
Author | Lucas C. Costa |
Author | Kleiton L. G. Machado |
Author | Marcela L. Barbosa |
Author | Raylla P. B. de Souza |
Author | Leonardo A. Oliveira |
Author | Diego S. Batista |
Author | Samuel C. V. Martins |
Author | José D. C. Ramalho |
Author | Fábio M. DaMatta |
URL | https://www.sciencedirect.com/science/article/pii/S009884722030174X |
Volume | 177 |
Pages | 104148 |
Publication | Environmental and Experimental Botany |
ISSN | 0098-8472 |
Date | September 1, 2020 |
Journal Abbr | Environmental and Experimental Botany |
DOI | 10.1016/j.envexpbot.2020.104148 |
Accessed | 10/13/2021, 5:29:05 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | Rising air CO2 concentration ([CO2]) is believed to mitigate the negative impacts of global climate changes such as increased air temperatures and drought events on plant growth and survival. Nonetheless, how elevated [CO2] affects the way coffee (Coffea arabica L.) plants sense and respond to drought remains a critical unknown. In this study, potted coffee plants were cultivated under two air [CO2] (ca. 400 ppm or 700 ppm) in open top chambers under greenhouse conditions. After a 5-month exposure to [CO2] treatments, plants were submitted to a progressive, controlled soil water deficit down to 20 % soil field capacity. Under well-watered (100 % field capacity) conditions, 700-plants displayed lower whole-plant transpiration rates (T) than their 400-counterparts. Changes in T were unrelated to stomatal conductances at the leaf scale (as well as stomatal morphology) or foliar ABA levels, but they were rather associated with faster stomata closure rates upon rapid increases in vapor pressure deficit in the 700-plants. During drought, 700-plants were able to maintain higher water potentials and plant hydraulic conductances for longer in parallel to higher T than their 400-counterparts. Under elevated [CO2], the faster stomatal closure rates (irrigated conditions) or the maintenance of plant hydraulic conductances (drought conditions) were associated with higher (3 to 40-fold) transcript abundance of most aquaporin genes. Altogether, our results suggest that elevated [CO2] has marked implications on how coffee plants respond to soil water deficit, ultimately permitting 700-plants to have improved fitness under drought when compared to 400-plants. |
Date Added | 10/13/2021, 5:29:05 PM |
Modified | 10/13/2021, 5:29:05 PM |
Type | Journal Article |
---|---|
Author | Fábio M. DaMatta |
Author | Rodrigo T. Avila |
Author | Amanda A. Cardoso |
Author | Samuel C. V. Martins |
Author | José C. Ramalho |
URL | https://doi.org/10.1021/acs.jafc.7b04537 |
Volume | 66 |
Issue | 21 |
Pages | 5264-5274 |
Publication | Journal of Agricultural and Food Chemistry |
ISSN | 0021-8561 |
Date | 2018-05-30 |
Extra | Publisher: American Chemical Society |
Journal Abbr | J. Agric. Food Chem. |
DOI | 10.1021/acs.jafc.7b04537 |
Accessed | 10/13/2021, 5:29:06 PM |
Library Catalog | ACS Publications |
Abstract | Coffee is one of the most important global crops and provides a livelihood to millions of people living in developing countries. Coffee species have been described as being highly sensitive to climate change, as largely deduced from modeling studies based on predictions of rising temperatures and changing rainfall patterns. Here, we discuss the physiological responses of the coffee tree in the context of present and ongoing climate changes, including drought, heat, and light stresses, and interactions between these factors. We also summarize recent insights on the physiological and agronomic performance of coffee at elevated atmospheric CO2 concentrations and highlight the key role of CO2 in mitigating the harmful effects of heat stress. Evidence is shown suggesting that warming, per se, may be less harmful to coffee suitability than previously estimated, at least under the conditions of an adequate water supply. Finally, we discuss several mitigation strategies to improve crop performance in a changing world. |
Short Title | Physiological and Agronomic Performance of the Coffee Crop in the Context of Climate Change and Global Warming |
Date Added | 10/13/2021, 5:29:06 PM |
Modified | 10/13/2021, 5:29:06 PM |
Type | Journal Article |
---|---|
Author | Weverton P. Rodrigues |
Author | Madlles Q. Martins |
Author | Ana S. Fortunato |
Author | Ana P. Rodrigues |
Author | José N. Semedo |
Author | Maria C. Simões-Costa |
Author | Isabel P. Pais |
Author | António E. Leitão |
Author | Filipe Colwell |
Author | Luis Goulao |
Author | Cristina Máguas |
Author | Rodrigo Maia |
Author | Fábio L. Partelli |
Author | Eliemar Campostrini |
Author | Paula Scotti-Campos |
Author | Ana I. Ribeiro-Barros |
Author | Fernando C. Lidon |
Author | Fábio M. DaMatta |
Author | José C. Ramalho |
URL | https://onlinelibrary.wiley.com/doi/abs/10.1111/gcb.13088 |
Volume | 22 |
Issue | 1 |
Pages | 415-431 |
Publication | Global Change Biology |
ISSN | 1365-2486 |
Date | 2016 |
Extra | _eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.13088 |
DOI | 10.1111/gcb.13088 |
Accessed | 10/13/2021, 5:29:08 PM |
Library Catalog | Wiley Online Library |
Language | en |
Abstract | The tropical coffee crop has been predicted to be threatened by future climate changes and global warming. However, the real biological effects of such changes remain unknown. Therefore, this work aims to link the physiological and biochemical responses of photosynthesis to elevated air [CO2] and temperature in cultivated genotypes of Coffea arabica L. (cv. Icatu and IPR108) and Coffea canephora cv. Conilon CL153. Plants were grown for ca. 10 months at 25/20 °C (day/night) and 380 or 700 μl CO2 l−1 and then subjected to temperature increase (0.5 °C day−1) to 42/34 °C. Leaf impacts related to stomatal traits, gas exchanges, C isotope composition, fluorescence parameters, thylakoid electron transport and enzyme activities were assessed at 25/20, 31/25, 37/30 and 42/34 °C. The results showed that (1) both species were remarkably heat tolerant up to 37/30 °C, but at 42/34 °C a threshold for irreversible nonstomatal deleterious effects was reached. Impairments were greater in C. arabica (especially in Icatu) and under normal [CO2]. Photosystems and thylakoid electron transport were shown to be quite heat tolerant, contrasting to the enzymes related to energy metabolism, including RuBisCO, which were the most sensitive components. (2) Significant stomatal trait modifications were promoted almost exclusively by temperature and were species dependent. Elevated [CO2], (3) strongly mitigated the impact of temperature on both species, particularly at 42/34 °C, modifying the response to supra-optimal temperatures, (4) promoted higher water-use efficiency under moderately higher temperature (31/25 °C) and (5) did not provoke photosynthetic downregulation. Instead, enhancements in [CO2] strengthened photosynthetic photochemical efficiency, energy use and biochemical functioning at all temperatures. Our novel findings demonstrate a relevant heat resilience of coffee species and that elevated [CO2] remarkably mitigated the impact of heat on coffee physiology, therefore playing a key role in this crop sustainability under future climate change scenarios. |
Date Added | 10/13/2021, 5:29:08 PM |
Modified | 10/13/2021, 5:29:08 PM |
Type | Journal Article |
---|---|
Author | Nelson F. Rodríguez-López |
Author | Samuel C. V. Martins |
Author | Paulo C. Cavatte |
Author | Paulo E. M. Silva |
Author | Leandro E. Morais |
Author | Lucas F. Pereira |
Author | Josimar V. Reis |
Author | Rodrigo T. Ávila |
Author | Alice G. Godoy |
Author | Alyne O. Lavinski |
Author | Fabio M. DaMatta |
URL | https://www.sciencedirect.com/science/article/pii/S0098847214000148 |
Volume | 102 |
Pages | 1-10 |
Publication | Environmental and Experimental Botany |
ISSN | 0098-8472 |
Date | June 1, 2014 |
Journal Abbr | Environmental and Experimental Botany |
DOI | 10.1016/j.envexpbot.2014.01.008 |
Accessed | 10/13/2021, 5:29:10 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | Acclimations to low and high light levels are located in opposite extremes. We examined how the coffee plant (Coffea arabica), which is considered to be shade-demanding although it performs well under full sun exposure, can acclimate to a range of light regimens. We hypothesised that the growth and physiological performance depends on the total amount of light received by the plant per day and on the temporal order of diurnal variations in the light supply. The biomass accumulation and allocation and the key photosynthetic traits of pot-grown coffee seedlings were examined over a range of light treatments as follows: plants grown entirely under 100%, 40% or 10% sunlight; plants grown at either 40% or 10% sunlight from sunrise to midday and then submitted to full sunlight until sunset; and plants grown under full sunlight from sunrise to midday and then submitted to either 40% or 10% sunlight throughout the afternoon. The total biomass increased linearly with the increasing total light supply; however, plants receiving high amounts of light in the morning grew more than those receiving high amounts of light in the afternoon. Extensive morphological changes (e.g., specific leaf areas and leaf area ratios) primarily responsive to total light rather than diurnal light fluctuations or light quality, at a given light supply, were noted. In contrast, changes in the photosynthetic performance per unit leaf area among the treatments were narrower and apparently unrelated to carbohydrate accumulation or photoinhibition. Overall, we found a poor leaf-level physiological plasticity of traits to light. We suggest that adjustments in leaf number and leaf area, coupled with whole-plant physiological adjustments, could largely account for the differences in the biomass amongst treatments. We also suggest that coffee could be classified as a shade-tolerant species as its traits do not match the requirements of either a classic shade-avoiding or a classic shade-demanding species. |
Date Added | 10/13/2021, 5:29:10 PM |
Modified | 10/13/2021, 5:29:10 PM |
Extracted Annotations (10/16/2021, 3:58:39 PM)
"The experiments were conducted in Vicosa (20◦45 S, 42◦54 W; 650m in altitude) in southeastern Brazil. Uniform coffee seedlings (C. arabica L. cv. 'Red Catuaí IAC 44') were grown from seeds and transplanted after growing three leaf pairs (January 7, 2010) into 12L pots containing a mixture of soil, sand and composted manure (4:1:1v/v/v)." (p. 2)
"After transplantation, the seedlings were randomlysubmittedtosevenlighttreatmentsasfollows:plantsgrown entirely under 100%, 40% or 10% sunlight (S-100, S-40 and S-10, respectively); plants grown every day at either 40% or 10% sunlight throughout the morning (from sunset to midday) and then submitted to full sunlight until sunrise (S-40/100 and S-10/100, respectively); and plants grown every day under full sunlight from sunrise to midday and then submitted to either 40% or 10% sunlight throughout the afternoon (S-100/40 and S-100/10, respectively)." (p. 2)
"All of these light treatment combinations were applied for 150 days. The shade shelters were provided by neutral density black nylon nettings." (p. 2)
"The plants were irrigated and fertilised as required, and no apparent restriction was observed in the root development at the end of the experiment." (p. 2)
"The shade shelters did not alter the quality of the transmitted light compared to direct sunlight, as deduced by the unchanging blue/red and red/far red ratios (approximately 0.98 and 1.17," (p. 3)
"respectively), as determined at midday. These ratios, although differing at both dawn and dusk, were virtually unchanged by the black nettings that were used (Table 1)." (p. 4)
"The total biomass increased linearly with the increasing total PAR supply (r2 =0.93, P<0.001; Fig. 2) with numbers ranging from 9.4g in S-10 plants to 53.8g in their S-100 counterparts (Fig. 3)." (p. 4)
"These results indicate that the biomass accumulation responded not only to the total PAR but also to the temporal scales of the PAR supply; these findings were additionally highlighted by the larger (52%) biomass in S-100/10 than in S-10/100 individuals despite the small differences in the total PAR supply (Fig. 1), whereas the differences (18%) in biomass between the S-100/40 and S-40/100 individuals did not reach statistical significance (Fig. 3)." (p. 4)
"However, a greater (35%) biomass was observed in S-100/40 compared to S-40 individuals (Fig. 3)." (p. 4)
"The plant heights decreased significantly (18%) in the S-10 plants compared to plants from the other treatments, which did not differ from one another." (p. 4)
"The highest leaf numbers were observed in S-100 individuals and decreased by 23% and 71% in the S-40 and S-10 treatments, respectively" (p. 4)
"In plants that were subjected to temporal variations in the PAR availability, the leaf number in the S-40/100 and S-100/40 plants were similar, whereas the number in S-100/10 individuals was 20% greater than in the S-10/100 individuals (Fig. 3)." (p. 4)
"Compared to the S-100 plants, decreases in the total leaf area were observed in S-40 (21%) and S-10 plants (64%)." (p. 4)
"The total leaf areas were similar in S-40/100 and S-100/40 plants, but they were lower (29%) in S-10/100 plants than in their S-100/10 counterparts." (p. 4)
"The numbers of plagiotropic branches were remarkably lower in S-10 individuals and did not differ among the plants from the other treatments." (p. 4)
"Despite our light quality assessments having been confined to a few days, it should be emphasised that the spectrum of the global radiation is remarkably constant irrespective of the season and weather conditions at a given latitude as long as the sun is more than 10◦ above the horizon (Smith, 1982)." (p. 8)
"In agreement with our working hypothesis, we herein demonstrated that the ability of the coffee plant to accumulate biomass depended on the total PAR, though the amount of the PAR that was received by the plants during the morning played a more significant role than that received during the afternoon in driving the biomass accumulation, a fact probably related to improved gas exchanges throughout the morning." (p. 8)
"Furthermore, we also demonstrated that whole-plant physiological adjustments could largely account for the differences in the biomass, particularly in the plants subjected to changing PAR supplies." (p. 8)
"When comparing the S-100, S-40 and S-10 individuals, the behaviourofthemorphologicaltraitswiththedecreasinglightsupply is clearly consistent with the shade avoidance acclimations (Yu and Ong, 2003; Franklin and Whitelam, 2005; Forster et al., 2011): increased LAR and SLA, increased allocation to orthotropic stems, delayed branching (less allocation to plagiotropic branches) and decreased allocation to roots" (p. 9)
"Despite the plant height being lower in the S-10 plants, its height-to-stem diameter ratio (the slenderness index) was higher than in the plants from the other treatments (data not shown), once again highlighting a shading avoidance strategy (Yagi, 2009) of the coffee seedlings." (p. 9)
"However, all of these plastic responses to the PAR supply were apparently independent on light quality, in contrast to what has been seen in true shade-avoiding species in which changes in blue light and red/far red ratios are known to play important roles in morphogenetic processes such as leaf formation and leaf morphology (Franklin, 2008)." (p. 9)
"Ultimately, changes in growth responses associated with diminished PAR levels in the absence of spectral alterations suggest a behaviour more consistent with shade-tolerant than shade-avoiding species (Griffith and Sultan, 2005)." (p. 9)
"Therefore, in line with the suggestion of Matos et al. (2009) based on leaf-level traits, it is tempting to consider the modern coffee cultivars behave as shade-tolerant as their traits do not match the requirements of either a classic shade-avoiding or a classic shadedemanding species." (p. 9)
Type | Journal Article |
---|---|
Author | Stephanie Gagliardi |
Author | Adam R. Martin |
Author | Elias de M. Virginio Filho |
Author | Bruno Rapidel |
Author | Marney E. Isaac |
URL | https://www.sciencedirect.com/science/article/pii/S0167880914005155 |
Volume | 200 |
Pages | 151-160 |
Publication | Agriculture, Ecosystems & Environment |
ISSN | 0167-8809 |
Date | February 1, 2015 |
Journal Abbr | Agriculture, Ecosystems & Environment |
DOI | 10.1016/j.agee.2014.11.014 |
Accessed | 10/13/2021, 5:30:27 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | The leaf economics spectrum (LES) refers to a suite of correlated leaf-level physiological, morphological, and chemical traits that can be used to describe life-history strategy among plant species. Documenting LES trait variation across environmental gradients has been important for understanding natural plant community dynamics in response to environmental change. However few studies have examined how LES traits covary within crops, or how the LES is correlated with farm-level management practices or goals, especially for important tree-crops such as coffee. We analyzed within-species variation in eight leaf traits in 60 Coffea arabica plants, across four management treatments differing in shade-tree species composition, to test (i) if hypothesized LES patterns also describe within-species trait variation, and (ii) if LES traits vary in response to management regimes, or are correlated with reproductive output. Leaf traits varied widely across coffee plants with photosynthetic rates (Amass) and leaf area showing especially high variation. In bivariate and multivariate analyses, coffee leaf traits covaried in patterns consistent with the LES, suggesting shifts between leaf-level resource acquisition and conservation traits among plants may also underpin coffee responses to agroforestry management. The position of a coffee plant along the LES (as described by a principal component analysis score) was best explained by light availability, but did not vary systematically with shade tree composition. LES traits were weakly but significantly related to plant-level reproductive output: coffee plants associated with lower Amass and leaf N values, and higher leaf mass per area were associated with greater reproductive output. In showing that the LES describes resource capture and/or conservation strategies among coffee plants, our study represents a novel adoption of the LES to address applied questions in managed systems. Since within species differences in leaf traits partially explain differences in coffee yield, we also suggest that trait-based research in agroecology can contribute to an applied and comprehensive understanding of crop functional biology, and ultimately, agroecosystem structure and function. |
Date Added | 10/13/2021, 5:30:27 PM |
Modified | 10/13/2021, 5:30:27 PM |
Type | Journal Article |
---|---|
Author | G. A. B. K. Moraes |
Author | A. R. M. Chaves |
Author | S. C. V. Martins |
Author | R. S. Barros |
Author | F. M. DaMatta |
URL | https://doi.org/10.1007/s11099-010-0025-4 |
Volume | 48 |
Issue | 2 |
Pages | 199-207 |
Publication | Photosynthetica |
ISSN | 1573-9058 |
Date | 2010-06-01 |
Journal Abbr | Photosynthetica |
DOI | 10.1007/s11099-010-0025-4 |
Accessed | 10/13/2021, 5:31:55 PM |
Library Catalog | Springer Link |
Language | en |
Abstract | The coffee plant is native to shaded environments and its seedlings are often produced in shaded nurseries. However, some nursery managers, in an effort to improve the acclimation of seedlings to field conditions after transplantation, produce seedlings in full sun exposure. In this study, the morphological and physiological parameters of arabica coffee (Coffea arabica) seedlings produced in full sun (T1) and in shade (T2) were examined. The biomass accumulation and relative growth rate of T1 and T2 seedlings were similar. The T1 seedlings had less biomass allocation to shoots, a lower leaf mass ratio and a lower leaf area ratio; however, they had a greater net assimilation rate (rate of increase in plant mass per unit leaf area), which was associated with a greater net photosynthetic rate. There were no alterations in the concentrations of total chlorophylls or in the chlorophyll a/b ratio when comparing T1 and T2 seedlings. No indications of photoinhibition or photooxidative damage were observed in the T1 plants, which were shown to have a more robust antioxidant system than the T2 plants. Seedlings transferred from shade to full sun (T3) were not capable of utilising the incident extra light to fix CO2. These seedlings showed a remarkable nocturnal retention of zeaxanthin and a significantly increased deepoxidation state of the xanthophyll cycle, even at predawn, but the activity of antioxidant enzymes was lower than in the T1 and T2 plants. Despite the acclimation capacity of T3 seedlings to the new light environment, they exhibited chronic photoinhibition and considerable photooxidative damage throughout the seven days following the transfer to full sun exposure. We further discuss the practical implications of producing coffee seedlings in full sunlight and under shade. |
Short Title | Why is it better to produce coffee seedlings in full sunlight than in the shade? |
Date Added | 10/13/2021, 5:31:55 PM |
Modified | 10/13/2021, 5:31:55 PM |
Extracted Annotations (10/17/2021, 10:58:02 PM)
"Experiments were conducted from October 2006 to March 2007 in Viçosa (20º45'S, 42º54'W, 650-m altitude), southeastern Brazil." (p. 200)
"Coffee (Coffea arabica L. cv. 'Catuaí Vermelho IAC 44') seeds were conditioned in humidified germistest paper and placed in a germinator at 30ºC." (p. 200)
"After the germination process, the seedlings ("soldier" stage; about 2 cm high) were transferred (20 October 2006) to polyethylene bags (one for each bag) with the usual dimensions for coffee (11 × 22 cm)." (p. 200)
"Of a total of 300 seedlings, half were cultivated under full exposure, and the other half under 50% shade (nursery conditions), using nylon screens of neutral density." (p. 200)
"The average irradiance (08:00 h - 16:00 h) incident on the coffee seedlings was 1,283 and 617 μmol(photon) m-2 s-1, respectively for plants under full sunlight and shaded conditions." (p. 200)
"At 135 DAT, biomass accumulation and the relative growth rate (RGR) were similar between plants grown in full sun (T1) and in the shade (T2); however, NAR was greater in the former (Table 1)." (p. 201)
"As a whole, these" (p. 201)
"allometric alterations resulted in a larger shoot-to-root (S/R) ratio in the T2 plants (Table 1). In general, the differences found at 135 DAT were also demonstrated at 160 DAT, although they were less pronounced than those observed at 135 DAT (Table 1)." (p. 202)
"In this study, biomass accumulation and RGR were both similar when comparing the T1 and T2 plants, even though the T1 plants had decreased biomass allocation to shoots and decreased LAR, as found at 135 DAT." (p. 203)
"As a whole, such behaviour should be associated with a greater NAR of the T1 plants, which should be associated with greater PN of those plants over time" (p. 203)
"Furthermore, the pattern of biomass allocation of the T1 plants should enable them to gain greater access to water and nutrients (larger RMR) in addition to having a smaller total transpiration rate (smaller leaf area), which would allow for a better acclimation after transplantation into the field." (p. 204)
"The results presented here do not support data reported by Paiva et al. (2003), who observed that seedlings of arabica coffee grow better in shade than in full sun. In their study, Paiva et al. (2003) observed S/R ratio values of around 6.0 for plants under 50% shading as well as those under full sun. In contrast, in this study, the S/R ratio varied between 1.6 and 2.5. An elevated S/R ratio can indicate a spatial restriction of root growth; in this case, the balance between the roots and the shoot is probably lost, so the roots would not succeed in supplying the shoot properly, especially with water (Poorter and Nagel 2000, Ronchi et al. 2006)." (p. 204)
"Nonetheless, no evidence of chronic photoinhibition or photooxidative damages was observed, as the T1 plants exhibited a discreet decrease in the Fv/Fm ratio with recovery at predawn, in addition to showing an MDA concentration similar to that of the T2 plants." (p. 204)
"Thus, it is suggested that the decreased activity of antioxidant enzymes is a reflection of an excessive increase in ROS production after an abrupt change from a shaded environment to full sun, which ultimately contributed to a lower capacity of the plant to properly adjust to the greater excitation pressure in the new light environment." (p. 206)
"These results fully agree with those reported by Ramalho and co-workers (1998, 1999, 2000), who showed that coffee plants (cv. 'Catuaí') with adequate nitrogen nutrition were able to recover from the photoinhibitory impact only after the 7th day after transferring plants from shade to high-light conditions." (p. 206)
"Such a recovery, which involved improved photosynthetic performance and strengthening of antioxidant mechanisms (e.g., zeaxanthin, APX and GR activities), was almost completed after 14 days in high light." (p. 206)
"The fact that seedlings present larger leaves (and a larger leaf area) and are greener (usually indicating a larger Chl concentration) when grown in the shade as compared to full sun can transmit a false perception of greater vigour of the plant." (p. 206)
"In addition, the physiological performance of seedlings grown in full sun was superior to that of seedlings grown in the shade and transferred to full sunlight, as deduced from greater photosynthetic rates (and larger NAR) accompanied by a more robust antioxidative system, which, collectively, was reflected by an adequate capacity for photoprotection, even under high irradiance." (p. 206)
"In summary, the cultivation of coffee seedlings in full sun was shown to be a viable option that should be considered by coffee growers due to the superior performance of these seedlings as compared to seedlings grown in the shade." (p. 206)
Type | Journal Article |
---|---|
Author | Wagner L. Araujo |
Author | Paulo C. Dias |
Author | Gustavo A. B. K. Moraes |
Author | Elaine F. Celin |
Author | Roberto L. Cunha |
Author | Raimundo S. Barros |
Author | Fábio M. DaMatta |
URL | https://www.sciencedirect.com/science/article/pii/S0981942808000934 |
Volume | 46 |
Issue | 10 |
Pages | 884-890 |
Publication | Plant Physiology and Biochemistry |
ISSN | 0981-9428 |
Date | October 1, 2008 |
Journal Abbr | Plant Physiology and Biochemistry |
DOI | 10.1016/j.plaphy.2008.05.005 |
Accessed | 10/13/2021, 5:31:56 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | Limitations to photosynthesis were explored in leaves from four canopy positions of field-grown, unshaded coffee (Coffea arabica L.), a tropical tree species classified as shade-obligatory. Overall, compared to shade (lower) leaves, sun (upper) leaves had higher net carbon assimilation rate (A) (4.5 against 2.0μmolm−2s−1 at most) associated with higher electron transport rate (due to a greater irradiance availability) but unrelated to stomatal and mesophyll conductances, which were similar regardless of leaf position. Neither physiological variable directly involved with photosynthetic carbon gain nor those involved with light capture were able to adjust themselves to match the capacity of the photosynthetic machinery to the light supply. We concluded that: (i) there was no major difference in photosynthetic capacity between sun and shade leaves; (ii) the intrinsic low A in coffee was greatly associated with remarkable low diffusive limitations rather than with biochemical or photochemical constraints; and (iii) morphological (e.g., variations in specific leaf area and leaf inclination) or anatomical plasticity should be of greater acclimative value than physiological plasticity as a mean of coffee leaves to respond to changing irradiance. |
Date Added | 10/13/2021, 5:31:56 PM |
Modified | 10/13/2021, 5:31:56 PM |
Type | Journal Article |
---|---|
Author | Roberta Fulthorpe |
Author | Adam R. Martin |
Author | Marney E. Isaac |
URL | https://apsjournals.apsnet.org/doi/full/10.1094/PBIOMES-04-19-0021-R |
Volume | 4 |
Issue | 1 |
Pages | 27-39 |
Publication | Phytobiomes Journal |
Date | January 1, 2020 |
Extra | Publisher: Scientific Societies |
DOI | 10.1094/PBIOMES-04-19-0021-R |
Accessed | 10/13/2021, 5:39:26 PM |
Library Catalog | apsjournals.apsnet.org (Atypon) |
Abstract | The root microbiome of Central American coffee trees was studied from four different sites experiencing different annual temperatures and precipitation levels, sampling from plots grown conventionally and under agroforestry management (with shade trees). Total community DNA was separately extracted from roots from four trees sampled from each site/management pair and analyzed using terminal restriction fragment polymorphism analysis and also next generation sequencing (Illumina) of fungal and bacterial ribosomal amplicons. Community profiles were analyzed for site and management effects and correlations to environmental parameters and tree leaf and root economic traits. Communities of both bacteria and fungi varied with site locations, but were not impacted by management system type. They also both varied strongly with environmental parameters. Fungal communities also showed significant variation that could be attributed to plant leaf and root traits. Pooled DNA samples from each site/management regime were used to generate amplicons for next generation sequencing to determine the dominant members of the coffee root microbiome at these locations. Core bacterial genera included Pantoea, Enterobacter, and Burkholderia, while fungal core communities were dominated by members of Cladosporium, Penicillium, Exidiopsis, Trechispora, and Mycena. The potential ecological function of these microbial associates is discussed. |
Short Title | Root Endophytes of Coffee (Coffea arabica) |
Date Added | 10/13/2021, 5:39:26 PM |
Modified | 10/13/2021, 5:39:26 PM |
Type | Journal Article |
---|---|
Author | Mirian T. S. Eira |
Author | E. A. Amaral da Silva |
Author | Renato D. De Castro |
Author | Stéphane Dussert |
Author | Christina Walters |
Author | J. Derek Bewley |
Author | Henk W. M. Hilhorst |
URL | http://www.scielo.br/j/bjpp/a/zZgRS3Mbwg8KjW8R9bn9X3L/?lang=en |
Volume | 18 |
Pages | 149-163 |
Publication | Brazilian Journal of Plant Physiology |
ISSN | 1677-9452 |
Date | 2006-03 |
Extra | Publisher: Brazilian Journal of Plant Physiology |
Journal Abbr | Braz. J. Plant Physiol. |
DOI | 10.1590/S1677-04202006000100011 |
Accessed | 10/13/2021, 5:39:27 PM |
Library Catalog | SciELO |
Language | en |
Abstract | Considerable advances in our understanding of coffee seed physiology have been made in recent years. However, despite intense research efforts, there are many aspects that remain unclear. This paper gives an overview of the current understanding of the more important features concerning coffee seed physiology, and provides information on recent findings on seed development, germination, storage and longevity. |
Date Added | 10/13/2021, 5:39:27 PM |
Modified | 10/13/2021, 5:39:27 PM |
Extracted Annotations (10/18/2021, 4:40:34 PM)
"Fruits may not initiate growth immediately after flowering, but may remain in a latent state of up to 60 days after pollination or anthesis (DAA);" (p. 150)
"Observations made at the Coffee Genebank of the Instituto Agronômico de Campinas, in Brazil, have shown that the length of the seed maturation process is different depending on the species. C. arabica seeds are mature after 210-250 DAA, while C. canephora seeds take 300-350 days, C. dewevrei and C. liberica around 360 days, and C. racemosa only 90 days (Medina Filho et al., 1984; Carvalho et al., 1991)." (p. 151)
"Although not yet fully differentiated and developed, cotyledonary embryos isolated from seeds of C. arabica between 120 and 150 DAA are able to germinate and develop into seedlings when directly incubated on Murashige and Skoog (MS) culture medium, demonstrating that embryos acquire the ability to germinate when immature (table 1; Estanislau, 2002)." (p. 152)
"On the other hand, whole seeds are able to germinate on water only when isolated from yellowishgreen fruits at around 225 DAA (table 2; Estanislau, 2002), corroborating the observations of Carvalho and Alvarenga (1979). This demonstrates a repression of the germination of immature embryos when enclosed in the developing coffee seeds, indicating the existence of a mechanism that maintains the embryo and the seed in a developmental mode while on the parent plant." (p. 152)
"Ellis and colleagues reported that the minimum water content to which seeds of C. arabica, C. canephora and C. liberica can be dried without damage is about 0.09 g H2O.g-1 dw, 0.10-0.12 g H2O.g-1 dw and 0.24 g H2O.g-1 dw, respectively (Ellis et al., 1990, 1991; Hong and Ellis, 1995)." (p. 155)
"More recent studies of C. racemosa, C. sessiliflora and C. costatifructa suggest greater sensitivity" (p. 155)
"to desiccation in these species with damage evident upon drying from an initial water content of 0.30 g H2O.g-1 dw (C. racemosa and C. sessiliflora), or with drying to water contents below 0.19 g H2O.g-1 dw (C. costatifructa) (Dussert et al., 1998)." (p. 156)
"Critical water contents and the way they have been reported by different laboratories vary slightly but the ranking of desiccation sensitivity of Coffea species appears to be consistent." (p. 156)
"Similarly, van der Vossen (1979) reported that storing arabica coffee seeds containing 0.15 to 0.50 g H2O.g-1 dw at 5°C results in an immediate loss of viability." (p. 156)
"Early reports showed that arabica coffee seeds with water contents adjusted to 0.11-0.12 g H2O.g-1 dw survive temperatures as low as -10 or -16°C for 10 days (Wellman and Toole, 1960)." (p. 156)
"Similar results were obtained by Eira et al. (1999a) for C. racemosa, C. arabica, C. canephora, C. congensis and C. dewevrei. Even at ultra low temperatures such as that of liquid nitrogen (-150 to -196°C) seed of several species of Coffea can survive if they are first desiccated to water contents of 0.20 g H2O.g-1 dw" (p. 156)
"Because of the difficulties of storing the seed, coffee germplasm is maintained in field collections, presenting significant problems, such as land and labor costs, susceptibility to environmental hazards and pathogens (Berthaud and Charrier, 1988)." (p. 157)
"Decreasing the storage temperature to 5°C considerably slowed the loss of seed viability, the amount of oxidative stress and the rate of lipid hydrolysis. No decline in seed viability occurred under storage conditions of 45 % RH/ 20°C. After 1 year at 45 % RH/5°C, the loss of seed viability was due to imbibitional damage and could be circumvented by pre-humidifying or pre-heating seeds before sowing." (p. 159)
Type | Journal Article |
---|---|
Author | Sven Knopp |
Author | Gerhard Bytof |
Author | Dirk Selmar |
URL | https://doi.org/10.1007/s00217-005-0172-1 |
Volume | 223 |
Issue | 2 |
Pages | 195 |
Publication | European Food Research and Technology |
ISSN | 1438-2385 |
Date | 2005-12-29 |
Journal Abbr | Eur Food Res Technol |
DOI | 10.1007/s00217-005-0172-1 |
Accessed | 10/13/2021, 5:39:30 PM |
Library Catalog | Springer Link |
Language | en |
Abstract | Quantitative analyses of low molecular sugars in green coffees (Coffea arabica L. var. Acaià) that were processed in parallel either by the traditional wet or the traditional dry method, revealed a close correlation between the kind of post-harvest treatment and the contents of fructose and glucose. While in washed coffee beans (wet processing) only low amounts of these both hexoses were present, those in unwashed coffees (dry processing) were significantly higher. Model-processing experiments in the laboratory confirmed these findings. Moreover, a comparison with the untreated controls revealed that the low levels of both sugars are the consequence of a decrease in the case of wet processing, whereas they remained unchanged or even increased in the case of dry processing. Further minor sugars are also affected by post-harvest treatment. The amounts of galactose, arabinose and mannose show a similar arrangement as those for glucose and fructose, although their overall concentration is about 100-fold lower. Sucrose, the major low molecular sugar in green coffee beans, is not significantly affected by coffee processing. The influence of an active seed metabolism on the observed alterations of the sugar concentrations is discussed. |
Date Added | 10/13/2021, 5:39:30 PM |
Modified | 10/13/2021, 5:39:30 PM |
Type | Journal Article |
---|---|
Author | Paulo C. Cavatte |
Author | Nélson F. Rodríguez-López |
Author | Samuel C. V. Martins |
Author | Mariela S. Mattos |
Author | Lílian M. V. P. Sanglard |
Author | Fábio M. DaMatta |
URL | https://doi.org/10.1093/jxb/ers027 |
Volume | 63 |
Issue | 8 |
Pages | 3071-3082 |
Publication | Journal of Experimental Botany |
ISSN | 0022-0957 |
Date | May 1, 2012 |
Journal Abbr | Journal of Experimental Botany |
DOI | 10.1093/jxb/ers027 |
Accessed | 10/13/2021, 5:39:30 PM |
Library Catalog | Silverchair |
Abstract | In this study, the combined effects of light and water availability on the functional relationships of the relative growth rate (RGR), leaf chemical composition, construction and maintenance costs, and benefits in terms of payback time for Coffea arabica are presented. Coffee plants were grown for 8 months in 100% or 15% full sunlight and then a four-month water shortage was implemented. Plants grown under full sunlight were also transferred to shade and vice versa. Overall, most of the traits assessed were much more responsive to the availability of light than to the water supply. Larger construction costs (12%), primarily associated with elevated phenol and alkaloid pools, were found under full sunlight. There was a positive correlation between these compounds and the RGR, the mass-based net carbon assimilation rate and the carbon isotope composition ratio, which, in turn, correlated negatively with the specific leaf area. The payback time was remarkably lower in the sun than in shade leaves and increased greatly in water-deprived plants. The differences in maintenance costs among the treatments were narrow, with no significant impact on the RGR, and there was no apparent trade-off in resource allocation between growth and defence. The current irradiance during leaf bud formation affected both the specific leaf area and leaf physiology upon transferring the plants from low to high light and vice versa. In summary, sun-grown plants fixed more carbon for growth and secondary metabolism, with the net effect of an increased RGR. |
Date Added | 10/13/2021, 5:39:30 PM |
Modified | 10/13/2021, 5:39:30 PM |
Type | Journal Article |
---|---|
Author | Samuel C. V. Martins |
Author | Wagner L. Araújo |
Author | Takayuki Tohge |
Author | Alisdair R. Fernie |
Author | Fábio M. DaMatta |
URL | https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0094862 |
Volume | 9 |
Issue | 4 |
Pages | e94862 |
Publication | PLOS ONE |
ISSN | 1932-6203 |
Date | Apr 14, 2014 |
Extra | Publisher: Public Library of Science |
Journal Abbr | PLOS ONE |
DOI | 10.1371/journal.pone.0094862 |
Accessed | 10/13/2021, 5:39:32 PM |
Library Catalog | PLoS Journals |
Language | en |
Abstract | Coffee (Coffea arabica L.) has been traditionally considered as shade-demanding, although it performs well without shade and even out-yields shaded coffee. Here we investigated how coffee plants adjust their metabolic machinery to varying light supply and whether these adjustments are supported by a reprogramming of the primary and secondary metabolism. We demonstrate that coffee plants are able to adjust its metabolic machinery to high light conditions through marked increases in its antioxidant capacity associated with enhanced consumption of reducing equivalents. Photorespiration and alternative pathways are suggested to be key players in reductant-consumption under high light conditions. We also demonstrate that both primary and secondary metabolism undergo extensive reprogramming under high light supply, including depression of the levels of intermediates of the tricarboxylic acid cycle that were accompanied by an up-regulation of a range of amino acids, sugars and sugar alcohols, polyamines and flavonoids such as kaempferol and quercetin derivatives. When taken together, the entire dataset is consistent with these metabolic alterations being primarily associated with oxidative stress avoidance rather than representing adjustments in order to facilitate the plants from utilizing the additional light to improve their photosynthetic performance. |
Date Added | 10/13/2021, 5:39:32 PM |
Modified | 10/13/2021, 5:39:32 PM |
Type | Journal Article |
---|---|
Author | Adugna Debela Bote |
Author | Zewdneh Zana |
Author | Fikre L. Ocho |
Author | Jan Vos |
URL | https://www.sciencedirect.com/science/article/pii/S1161030117301521 |
Volume | 92 |
Pages | 107-114 |
Publication | European Journal of Agronomy |
ISSN | 1161-0301 |
Date | January 1, 2018 |
Journal Abbr | European Journal of Agronomy |
DOI | 10.1016/j.eja.2017.10.006 |
Accessed | 10/13/2021, 5:39:35 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | Natural supply of nitrogen is often limiting coffee production. From the viewpoints of growth and biomass production, adequate nitrogen supply is important. Growing coffee under full sunlight not only enhances potential yields but also increases demands for nitrogen fertilizer, the extent of which is ill quantified. This paper provides a comprehensive analysis of N uptake and distribution, biomass production, photosynthetic characteristics of 2.5 years old trees and first bean yields of 3.5 years old coffee trees in response to four radiation treatments (30%–100% of full sun), factorially combined with four rates of nitrogen supply (0–88g tree−1 y−1). The experiment was arranged in a randomized split-split plot design and was conducted at Jimma University horticultural farm, Ethiopia, using three coffee varieties. With larger N application and higher level of radiation, more N was utilized and more biomass and yield were produced. The fertilizer-N recovery ranged from 7 to 17% and declined with larger N supply and increased with radiation level. Coffee trees provided with larger amount of N had higher amounts of N per unit leaf area, light-saturated rate of leaf photosynthesis and first bean yield compared to trees grown in low N supply and limited radiation. The relation between biomass and plant N content was conservative across coffee varieties and can be used to estimate N content from biomass or calculate required uptake to produce a given amount of biomass. Though testing of the relation for other climatic conditions is advisable, this relation can also be used in the development of process-based quantitative coffee tree growth models,. Achieving synchronies between N supply and coffee trees demand without excess or deficiency requires further investigation of options to improve the low nitrogen recovery. |
Date Added | 10/13/2021, 5:39:36 PM |
Modified | 10/13/2021, 5:39:36 PM |
Type | Journal Article |
---|---|
Author | Wellington L Almeida |
Author | Rodrigo T Ávila |
Author | Junior P Pérez-Molina |
Author | Marcela L Barbosa |
Author | Dinorah M S Marçal |
Author | Raylla P B de Souza |
Author | Pedro B Martino |
Author | Amanda A Cardoso |
Author | Samuel C V Martins |
Author | Fábio M DaMatta |
URL | https://doi.org/10.1093/treephys/tpaa116 |
Volume | 41 |
Issue | 1 |
Pages | 35-49 |
Publication | Tree Physiology |
ISSN | 1758-4469 |
Date | January 9, 2021 |
Journal Abbr | Tree Physiology |
DOI | 10.1093/treephys/tpaa116 |
Accessed | 10/13/2021, 5:39:40 PM |
Library Catalog | Silverchair |
Abstract | The overall coordination between gas exchanges and plant hydraulics may be affected by soil water availability and source-to-sink relationships. Here we evaluated how branch growth and mortality, leaf gas exchange and metabolism are affected in coffee (Coffea arabica L.) trees by drought and fruiting. Field-grown plants were irrigated or not, and maintained with full or no fruit load. Under mild water deficit, irrigation per se did not significantly impact growth but markedly reduced branch mortality in fruiting trees, despite similar leaf assimilate pools and water status. Fruiting increased net photosynthetic rate in parallel with an enhanced stomatal conductance, particularly in irrigated plants. Mesophyll conductance and maximum RuBisCO carboxylation rate remained unchanged across treatments. The increased stomatal conductance in fruiting trees over nonfruiting ones was unrelated to internal CO2 concentration, foliar abscisic acid (ABA) levels or differential ABA sensitivity. However, stomatal conductance was associated with higher stomatal density, lower stomatal sensitivity to vapor pressure deficit, and higher leaf hydraulic conductance and capacitance. Increased leaf transpiration rate in fruiting trees was supported by coordinated alterations in plant hydraulics, which explained the maintenance of plant water status. Finally, by preventing branch mortality, irrigation can mitigate biennial production fluctuations and improve the sustainability of coffee plantations. |
Date Added | 10/13/2021, 5:39:40 PM |
Modified | 10/13/2021, 5:39:40 PM |
Type | Journal Article |
---|---|
Author | I. Ridwan |
Author | A. Ala |
Author | Irfansyah T |
Author | Rafiuddin |
Author | M. Farid BDR |
Author | F. Haring |
URL | https://doi.org/10.1088/1755-1315/575/1/012113 |
Volume | 575 |
Pages | 012113 |
Publication | IOP Conference Series: Earth and Environmental Science |
ISSN | 1755-1315 |
Date | 2020-10 |
Extra | Publisher: IOP Publishing |
Journal Abbr | IOP Conf. Ser.: Earth Environ. Sci. |
DOI | 10.1088/1755-1315/575/1/012113 |
Accessed | 10/13/2021, 5:39:40 PM |
Library Catalog | Institute of Physics |
Language | en |
Abstract | This study aims to evaluate and provide an overview of farmers’ knowledge and understanding on the Good Agriculture Practice (GAP) of Arabica coffee cultivation and its implementation level on the smallholder estate in Enrekang Regency. The research was conducted in three districts of coffee plantation centre from December 2017 to January 2018. The research was carried out in the form of surveys including interviews, observations, and literature studies. A total of 30 respondents were selected using a purposive sampling method in addition to several key respondents from stakeholders and experts. Criteria for the selection was based on the involvement of the farmers in a GAP field schools or not. A proportional ratio of farmers involved in program and not involved were set for the survey. Data were analysed descriptively and quantitatively using comparative analysis with SPSS Version 16 to determine the difference in production of two groups of farmers. The results show that the overall implementation level of GAP by the smallholder farmers of Arabica coffee in Enrekang Regency is 54%. Highest level of GAP implementation was on post-harvest aspect (77%), followed by the harvest aspect (61%). The smallholder coffee farmers had the lowest GAP level on in cultivation aspect of 24%. Farmers that did not implement the GAP had a significantly lower production compared to the farmers who have participated in GAP field schools. |
Short Title | Good Agriculture Practice (GAP) of arabica coffee (Coffea arabica L.) |
Date Added | 10/13/2021, 5:39:40 PM |
Modified | 10/19/2021, 1:04:13 AM |
Extracted Annotations (10/15/2021, 7:06:30 PM)
"Local Arabica varieties are varieties that are used by farmers for generations or self-breeding from previous plantations or coffee plantations in the vicinity which are difficult to identify the original varieties. However, the results of direct identification of local Arabica varieties are closer to Catimor varieties, but there are no supporting sources that confirm the local Arabica varieties are Catimor." (p. 12119)
"Farmers that did not implement the GAP had a significantly lower production compared to the farmers who have participated in GAP field schools." (p. 12121)
Type | Journal Article |
---|---|
Author | F. J. NUTMAN |
URL | https://www.jstor.org/stable/42906557 |
Volume | 1 |
Issue | 3 |
Pages | 353-367 |
Publication | Annals of Botany |
ISSN | 0305-7364 |
Date | 1937 |
Extra | Publisher: Oxford University Press |
Accessed | 10/13/2021, 5:39:41 PM |
Library Catalog | JSTOR |
Abstract | In certain of the coffee-growing areas of East Africa a serious trouble known as 'overbearing and die-back' occurs. This has been described (Nutman, 1933) and evidence opresented for the view that the heavy demands for carbohydrate by the developing crop exhaust the reserves, and exceed the normal daily carbon income of the tree. The branches then die back; the greater part of the feeding roots is lost and not regenerated ; and the tree is permanently injured. Although it may not die for several years it remains unproductive. Since shortage of carbohydrate is associated with this form of die-back it is apparent that, if the rate of cropping is not to be reduced, means of control must be sought in an increase of the normal carbon income of the tree. Thus a knowledge of the rates of carbon assimilation of trees growing under plantation conditions is of importance. This paper deals with the results of an investigation into the rates of carbon assimilation under field conditions by leaves of Coffea arabica growing in the coffee districts of the Northern |
Short Title | Studies of the Physiology of Coffea arabica |
Date Added | 10/13/2021, 5:39:41 PM |
Modified | 10/19/2021, 11:52:18 PM |
Type | Journal Article |
---|---|
Author | Primluck Praphutphitthaya |
Author | Chantalak Tiyayon |
Author | Thaneeya Chetiyanukornkul |
Author | Tanachai Pankasemsuk |
URL | https://li01.tci-thaijo.org/index.php/agkasetkaj/article/view/250494 |
Rights | Copyright (c) 2016 Khon Kaen Agriculture Journal |
Volume | 44 |
Issue | 4 |
Pages | 693-702 |
Publication | วารสารแก่นเกษตร |
ISSN | 0125-0485 |
Date | 2016 |
Extra | Number: 4 |
Accessed | 10/13/2021, 5:39:44 PM |
Library Catalog | li01.tci-thaijo.org |
Language | en |
Abstract | Effect of Brassin-like substance on chemical compositions of Arabica coffee seeds was studied during early germination. The substance has played an important role in promoting seed germination and chemical composi-tion during germination. In this study, coffee seeds were soaked in four Brassin-like substance (BS) concentrations 0, 0.5, 1.0 and 2.0 mg/L for 24 hours before germination test. Total sugars, protein and fat contents were determined at 0, 2, 4, 6 and 8 days after soaking. The study was conducted as 4 × 5 factorial in completely randomized design: CRD. The results revealed that BS application significantly effected on nutritional quality during early germination. Total sugars reached the highest amount at day 8 when soaked in 1.0 and 2.0 mg/L BS. As for protein content, coffee seeds in every treatment showed the greatest amount at day 4 of germination especially, of coffee seeds for ones soaked in 1.0 and 2.0 mg/L BS. Fat content gradually increased upon the first 4 days of germination. Coffee seeds in 1.0 and 2.0 mg/L BS showed higher fat content than the seeds soaked in 0 and 0.5 mg/L BS. Therefore, BS application could be a promising alternative regulator for enhancing coffee seed quality during early germination. |
Date Added | 10/13/2021, 5:39:44 PM |
Modified | 10/15/2021, 2:06:22 PM |
Extracted Annotations (10/15/2021, 4:49:17 PM)
"Arabica coffee fruit (Coffea arabica L. cv. Catimor) were obtained from Highland Research and Training Center (Khun Chang Kien Station), Faculty of Agriculture, Chiang Mai University" (p. 694)
"The seeds were removed from a fruit berry, left fermented for 48 hours at ambient temperature. Subsequently, a part called mucilage was removed by hand and rinsed off using tab water. The seeds were dried (until moisture content became as low as 12%), and the endocarp was removed thereafter." (p. 694)
"Firstly, in order to control contamination, coffee seeds were soaked in 1% sodium hypochlorite (NaOCl) solution for 2 minutes, and subsequently rinsed off by distilled water." (p. 694)
"Four BS soaking treatments were made on this experiment, which were (i) distilled water (control treatment), (ii) 0.5 mg/L BS (Chaiwatana, Thailand), (iii) 1.0 mg/L BS and (iv) 2.0 mg/L BS. Soaking time was 24 hours, under the room temperature." (p. 694)
"Coffee seeds were placed between 2 layeredpaper in the aluminum tray (width × length = 18.0 × 29.0 cm). Each tray was moistened by spraying distilled water at an amount of 2.5 times of its weight (paper and seeds altogether). All trays were then incubated in a germination chamber Model 620 RHS, P6 Contherm, New Zealand (30.0 ± 1.0 ºC, 85.0 ± 5.0%RH) under dark condition." (p. 694)
"However, it indicated that no significant interaction between BS application and germination time." (p. 698)
"In conclusion, the application of BS seems to enhance the nutritional composition in early germination of Arabica coffee seed." (p. 698)
Type | Journal Article |
---|---|
Author | Raquel Ghini |
Author | André Torre-Neto |
Author | Anamaria F. M. Dentzien |
Author | Oliveiro Guerreiro-Filho |
Author | Regiane Iost |
Author | Flávia R. A. Patrício |
Author | Jeanne S. M. Prado |
Author | Roberto A. Thomaziello |
Author | Wagner Bettiol |
Author | Fábio M. DaMatta |
URL | https://doi.org/10.1007/s10584-015-1422-2 |
Volume | 132 |
Issue | 2 |
Pages | 307-320 |
Publication | Climatic Change |
ISSN | 1573-1480 |
Date | 2015-09-01 |
Journal Abbr | Climatic Change |
DOI | 10.1007/s10584-015-1422-2 |
Accessed | 10/13/2021, 5:39:45 PM |
Library Catalog | Springer Link |
Language | en |
Abstract | Despite the importance of coffee as a globally traded commodity and increasing concerns about risks associated with climate change, there is virtually no information about the effects of rising atmospheric [CO2] on field-grown coffee trees. This study shows the results of the first 2 years of an innovative experiment. Two commercial coffee cultivars (Catuaí and Obatã) were grown using the first free-air CO2 enrichment (FACE) facility in Latin America (ClimapestFACE). Plants of both cultivars maintained relatively high photosynthetic rates, water-use efficiency, increased growth and yield under elevated [CO2]. Harvestable crop yields increased 14.6 % for Catuaí and 12.0 % for Obatã. Leaf N content was lower in Obatã (5.2 %) grown under elevated [CO2] than under ambient [CO2]; N content was unresponsive to elevated [CO2] in Catuaí. Under elevated [CO2] reduced incidence of leaf miners (Leucoptera coffeella) occurred on both coffee cultivars during periods of high infestation. The percentage of leaves with parasitized and predated mines increased when leaf miner infestation was high, but there was no effect of elevated [CO2] on the incidence of natural enemies. The incidence of rust (Hemileia vastatrix) and Cercospora leaf spot (Cercospora coffeicola) was low during the trial, with maximum values of 5.8 and 1 %, respectively, and there was no significant effect of [CO2] treatments on disease incidence. The fungal community associated with mycotoxins was not affected by the treatments. |
Date Added | 10/13/2021, 5:39:45 PM |
Modified | 10/13/2021, 5:39:45 PM |
Type | Journal Article |
---|---|
Author | Madlles Q. Martins |
Author | Weverton P. Rodrigues |
Author | Ana S. Fortunato |
Author | António E. Leitão |
Author | Ana P. Rodrigues |
Author | Isabel P. Pais |
Author | Lima D. Martins |
Author | Maria J. Silva |
Author | Fernando H. Reboredo |
Author | Fábio L. Partelli |
Author | Eliemar Campostrini |
Author | Marcelo A. Tomaz |
Author | Paula Scotti-Campos |
Author | Ana I. Ribeiro-Barros |
Author | Fernando J. C. Lidon |
Author | Fábio M. DaMatta |
Author | José C. Ramalho |
URL | https://www.frontiersin.org/article/10.3389/fpls.2016.00947 |
Volume | 7 |
Pages | 947 |
Publication | Frontiers in Plant Science |
ISSN | 1664-462X |
Date | 2016 |
DOI | 10.3389/fpls.2016.00947 |
Accessed | 10/13/2021, 5:39:50 PM |
Library Catalog | Frontiers |
Abstract | Modeling studies have predicted that coffee crop will be endangered by future global warming, but recent reports highlighted that high [CO2] can mitigate heat impacts on coffee. This work aimed at identifying heat protective mechanisms promoted by CO2 in Coffea arabica (cv. Icatu and IPR108) and Coffea canephora cv. Conilon CL153. Plants were grown at 25/20°C (day/night), under 380 or 700 μL CO2 L−1, and then gradually submitted to 31/25, 37/30, and 42/34°C. Relevant heat tolerance up to 37/30°C for both [CO2] and all coffee genotypes was observed, likely supported by the maintenance or increase of the pools of several protective molecules (neoxanthin, lutein, carotenes, α-tocopherol, HSP70, raffinose), activities of antioxidant enzymes, such as superoxide dismutase (SOD), ascorbate peroxidase (APX), glutathione reductase (GR), catalase (CAT), and the upregulated expression of some genes (ELIP, Chaperonin 20). However, at 42/34°C a tolerance threshold was reached, mostly in the 380-plants and Icatu. Adjustments in raffinose, lutein, β-carotene, α-tocopherol and HSP70 pools, and the upregulated expression of genes related to protective (ELIPS, HSP70, Chape 20, and 60) and antioxidant (CAT, CuSOD2, APX Cyt, APX Chl) proteins were largely driven by temperature. However, enhanced [CO2] maintained higher activities of GR (Icatu) and CAT (Icatu and IPR108), kept (or even increased) the Cu,Zn-SOD, APX, and CAT activities, and promoted a greater upregulation of those enzyme genes, as well as those related to HSP70, ELIPs, Chaperonins in CL153, and Icatu. These changes likely favored the maintenance of reactive oxygen species (ROS) at controlled levels and contributed to mitigate of photosystem II photoinhibition at the highest temperature. Overall, our results highlighted the important role of enhanced [CO2] on the coffee crop acclimation and sustainability under predicted future global warming scenarios. |
Date Added | 10/13/2021, 5:39:50 PM |
Modified | 10/13/2021, 5:39:50 PM |
Type | Journal Article |
---|---|
Author | Lima D. Martins |
Author | Marcelo A. Tomaz |
Author | Fernando C. Lidon |
Author | Fábio M. DaMatta |
Author | José C. Ramalho |
URL | https://doi.org/10.1007/s10584-014-1236-7 |
Volume | 126 |
Issue | 3 |
Pages | 365-379 |
Publication | Climatic Change |
ISSN | 1573-1480 |
Date | 2014-10-01 |
Journal Abbr | Climatic Change |
DOI | 10.1007/s10584-014-1236-7 |
Accessed | 10/13/2021, 5:39:52 PM |
Library Catalog | Springer Link |
Language | en |
Abstract | Modelling studies predicted that climate change will have strong impacts on the coffee crop, although no information on the effective impact of elevated CO2 on this plant exists. Here, we aim at providing a first glimpse on the effect of the combined impact of enhanced [CO2] and high temperature on the leaf mineral content and balance on this important tropical crop. Potted plants from two genotypes of Coffea arabica (cv. Icatu and IPR 108) and one from C. canephora (cv. Conilon Clone 153) were grown under 380 or 700 μL CO2 L−1 air, for 1 year, after which were exposed to an stepwise increase in temperature from 25/20 °C (day/night) up to 42/34 °C, over 8 weeks. Leaf macro − (N, P, K, Ca, Mg, S) and micronutrients (B, Cu, Fe, Mn, Zn) concentrations were analyzed at 25/20 °C (control), 31/25 °C, 37/30 °C and 42/34 °C. At the control temperature, the 700 μL L−1 grown plants showed a moderate dilution effect (between 7 % and 25 %) in CL 153 (for N, Mg, Ca, Fe) and Icatu (for N, K and Fe), but not in IPR 108 (except for Fe) when compared to the 380 μL L−1 plants. For temperatures higher than control most nutrients tended to increase, frequently presenting maximal contents at 42/34 °C (or 37/30 °C), although the relation between [CO2] treatments did not appreciably change. Such increases offset the few dilution effects observed under high growth [CO2] at 25/20 °C. No clear species responses were found considering [CO2] and temperature impacts, although IPR 108 seemed less sensitive to [CO2]. Despite the changes promoted by [CO2] and heat, the large majority of mineral ratios were kept within a range considered adequate, suggesting that this plant can maintain mineral balances in a context of climate changes and global warming. |
Date Added | 10/13/2021, 5:39:52 PM |
Modified | 10/13/2021, 5:39:52 PM |
Type | Journal Article |
---|---|
Author | João Antonio Dutra Giles |
Author | Amanda Duim Ferreira |
Author | Fábio Luiz Partelli |
Author | Elisa Mitsuko Aoyama |
Author | José Cochicho Ramalho |
Author | Adésio Ferreira |
Author | Antelmo Ralph Falqueto |
URL | https://www.sciencedirect.com/science/article/pii/S0304423818306484 |
Volume | 245 |
Pages | 231-236 |
Publication | Scientia Horticulturae |
ISSN | 0304-4238 |
Date | February 9, 2019 |
Journal Abbr | Scientia Horticulturae |
DOI | 10.1016/j.scienta.2018.09.038 |
Accessed | 10/13/2021, 5:39:58 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | Knowing the genetic variability of a population is essential for guiding its preservation and maintenance, in addition to increasing the efficiency of genetic breeding programs. On this basis, the objective of this work was to estimate the genetic parameters, and to study genetic divergence in a coffee plants population constituted by 30 genotypes of Coffea canephora and 4 of C. arabica, by means of univariate and multivariate statistical procedures based on easy to obtain leaf morpho-anatomic characteristics (stomata number; index, density, area index, polar diameter, equatorial diameter, and functionality, as well as leaf area, dry weight, and specific dry weight). The materials were arranged in a randomized-blocks experimental design with four replicates. Significant differences were detected by the F-test (p < 0.01) between genotypes of Coffea sp. and for all morphological characters evaluated. This highlighted the heterogeneity of the genetic constitution of the evaluated population, which is quite relevant for the genetic divergence analysis and for breeding purposes, having the potential to identify superior genotypes. The tests of Scott-Knott allowed to detect variability between genotypes for all evaluated leaf morpho-anatomical characteristics, distributing genotypes in up to five groups. The clusters formed by Tocher’s optimization and the UPGMA hierarchical method were concordant, grouping the genotypes in ten and seven groups, respectively, showing similarities in the clusters. Three of the four clustered genotypes of C. arabica constituted an exclusive group for this species, in both methods. The characteristics with higher contribution to such distribution were stomata density (37.1%), number (17.3%), and index (12.1%), which together were responsible for 66.5% of the genetic diversity between the studied genotypes. |
Date Added | 10/13/2021, 5:39:58 PM |
Modified | 10/13/2021, 5:39:58 PM |
Type | Journal Article |
---|---|
Author | Miroslava Rakocevic |
Author | Rafael Vasconcelos Ribeiro |
Author | Paulo Eduardo Ribeiro Marchiori |
Author | Heloisa Ferreira Filizola |
Author | Eunice Reis Batista |
URL | https://doi.org/10.1093/aob/mcy011 |
Volume | 121 |
Issue | 5 |
Pages | 1065-1078 |
Publication | Annals of Botany |
ISSN | 0305-7364 |
Date | April 18, 2018 |
Journal Abbr | Annals of Botany |
DOI | 10.1093/aob/mcy011 |
Accessed | 10/13/2021, 5:39:58 PM |
Library Catalog | Silverchair |
Abstract | Climate forecasts suggest that [CO2] in the atmosphere will continue to increase. Structural and ecophysiological responses to elevated air [CO2] (e[CO2]) in tree species are contradictory due to species-dependent responses and relatively short-term experiments. It was hypothesized that long-term exposure (4 year) to e[CO2] would change canopy structure and function of Coffea arabica trees.Coffee plants were grown in a FACE (free air CO2 enrichment) facility under two air [CO2]: actual and elevated (actual + approx. 200 μL CO2 L–1). Plants were codified following the VPlants methodology to obtain coffee mock-ups. Plant canopies were separated into three 50 cm thick layers over a vertical profile to evaluate their structure and photosynthesis, using functional–structural plant modelling.Leaf area was strongly reduced on the bottom and upper canopy layers, and increased soil carbon concentration suggested changes in carbon partitioning of coffee trees under e[CO2]. Increased air [CO2] stimulated stomatal conductance and leaf photosynthesis at the middle and upper canopy layers, increasing water-use efficiency. Under e[CO2], plants showed reduced diameter of the second-order axes and higher investment in the youngest third to fifth-order axes.The responses of Arabica coffee grown under long-term exposure to e[CO2] integrated structural and functional modifications, which balanced leaf area loss through improvements in leaf and whole-plant photosynthesis. |
Date Added | 10/13/2021, 5:39:58 PM |
Modified | 10/13/2021, 5:39:58 PM |
Type | Journal Article |
---|---|
Author | Weverton Pereira Rodrigues |
Author | José Altino Machado Filho |
Author | Jefferson Rangel da Silva |
Author | Fábio Afonso Mazzei Moura de Assis Figueiredo |
Author | Tiago Massi Ferraz |
Author | Luciene Souza Ferreira |
Author | Luan Baritiello da Silva Bezerra |
Author | Deivisson Pelegrino de Abreu |
Author | Wallace de Paula Bernado |
Author | Letícia Cespom Passos |
Author | Elias Fernandes de Sousa |
Author | David Michael Glenn |
Author | José Cochicho Ramalho |
Author | Eliemar Campostrini |
URL | https://www.sciencedirect.com/science/article/pii/S030442381630423X |
Volume | 211 |
Pages | 194-202 |
Publication | Scientia Horticulturae |
ISSN | 0304-4238 |
Date | November 1, 2016 |
Journal Abbr | Scientia Horticulturae |
DOI | 10.1016/j.scienta.2016.08.022 |
Accessed | 10/13/2021, 5:40:00 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | Whole-canopy gas exchange provides a more accurate measurement of CO2 assimilation (Ac) and transpiration (Ec) compared to single-leaf. The objectives of this study were to evaluate whole-canopy gas exchange of 2 coffee species: Coffea arabica cv. Catuaí Amarelo-Catuaí and Coffea canephora cv. Emcapa 8111 Clone 02–Clone 02 during two different seasons varying in temperature. Six plants >1-year-old of each species were grown in pots (100L) in a greenhouse. Soil moisture was maintained at field capacity. Data were continuously collected for 10days during spring (September 2014—moderate temperatures) and summer (February 2015 with high temperature) and micrometeorological variables were monitored inside the greenhouse. Catuaí had a lower area leaf and higher branch angle resulting in greater light distribution within the canopy that contributed to higher net photosynthesis and transpiration as compared to Clone 02 in both seasons. Catuaí had reduced whole-canopy CO2 assimilation and transpiration during summer, mainly linked to reduced whole-canopy conductance. However, Clone 02 had similar whole-canopy CO2 assimilation and transpiration values in both seasons. Despite reduced gas exchange for Catuaí during summer, the relationship between Ac and Ec indicated that Catuaí had a greater instantaneous WUEc than Clone 02 during spring and there were no differences between species during summer. The dense canopy architecture of Clone 02 limited whole-canopy gas exchange due to poor light distribution within the canopy whereas Catuaí had better canopy light distribution resulting in higher photosynthetic rates than Clone 02 during spring. Additionally, the architecture had a negative effect when Catuaí experiences increased temperature that reduced whole-canopy conductance. High temperatures may limit the growth and production of coffee plants in tropical areas. |
Short Title | Whole-canopy gas exchanges in Coffea sp. is affected by supra-optimal temperature and light distribution within the canopy |
Date Added | 10/13/2021, 5:40:00 PM |
Modified | 10/13/2021, 5:40:00 PM |
Type | Journal Article |
---|---|
Author | Weverton P. Rodrigues |
Author | Jefferson R. Silva |
Author | Luciene S. Ferreira |
Author | José A. Machado Filho |
Author | Fabio A. M. M. A. Figueiredo |
Author | Tiago M. Ferraz |
Author | Wallace P. Bernado |
Author | Luan B. S. Bezerra |
Author | Deivisson P. de Abreu |
Author | Letícia Cespom |
Author | José C. Ramalho |
Author | Eliemar Campostrini |
Author | Weverton P. Rodrigues |
Author | Jefferson R. Silva |
Author | Luciene S. Ferreira |
Author | José A. Machado Filho |
Author | Fabio A. M. M. A. Figueiredo |
Author | Tiago M. Ferraz |
Author | Wallace P. Bernado |
Author | Luan B. S. Bezerra |
Author | Deivisson P. de Abreu |
Author | Letícia Cespom |
Author | José C. Ramalho |
Author | Eliemar Campostrini |
URL | https://www.publish.csiro.au/cp/CP17044 |
Volume | 69 |
Issue | 3 |
Pages | 317-325 |
Publication | Crop and Pasture Science |
ISSN | 1836-5795, 1836-5795 |
Date | 2018/03/26 |
Extra | Publisher: CSIRO PUBLISHING |
Journal Abbr | Crop Pasture Sci. |
DOI | 10.1071/CP17044 |
Accessed | 10/13/2021, 5:40:04 PM |
Library Catalog | www.publish.csiro.au |
Language | en |
Abstract | Temperature increase assumes a prominent role in the context of expected climate change because of its significant impact on plant metabolism. High temperature can affect the carbon-assimilation pathway at both stomatal and non-stomatal levels, mainly through stomatal closure and photochemical and biochemical limitations. In general, however, plants have some ability to trigger acclimation mechanisms to cope with stressful conditions, especially if the limitations are imposed in a gradual manner during seasonal change. This study aims at evaluating changes at stomatal and photochemical levels in Coffea arabica and C. canephora under exposure to mild temperature (spring) and high temperature (summer). Potted plants were maintained in a greenhouse, watered to field capacity and subject to natural variations of light, temperature and relative humidity. In C. arabica, exposure to summer conditions decreased photosynthetic rates (A), stomatal conductance (gs) and stomatal density and increased intrinsic water-use efficiency (iWUE) compared with spring values, whereas C. canephora plants maintained similar values in both seasons. However, C. canephora presented lower A and gs during spring than C. arabica. Because photosynthetic capacity (Amax), photosynthetic performance index and membrane permeability were similar between genotypes and seasons, and maximum quantum yield (Fv/Fm) and photosynthetic pigments were not affected in C. arabica in summer, we conclude that under high temperature conditions, stomatal closure imposes the major limitation on C. arabica photosynthesis in summer. Finally, both coffee genotypes were able to avoid damage to photochemistry pathway under supra-optimal temperatures. |
Date Added | 10/13/2021, 5:40:04 PM |
Modified | 10/13/2021, 5:40:04 PM |
Type | Journal Article |
---|---|
Author | Lindomar Souza Machado |
Author | Lima Deleon Martins |
Author | Wagner Nunes Rodrigues |
Author | Daniel S. Ferreira |
Author | Adan Dezan Côgo |
Author | Marcelo Antônio Tomaz |
Author | José Francisco Teixeira do Amaral |
URL | https://www.ajol.info/index.php/ajb/article/view/144441 |
Rights | Copyright (c) |
Volume | 15 |
Issue | 35 |
Pages | 1892-1898 |
Publication | African Journal of Biotechnology |
ISSN | 1684-5315 |
Date | 2016-09-23 |
Extra | Number: 35 |
DOI | 10.4314/ajb.v15i35 |
Accessed | 10/13/2021, 6:25:06 PM |
Library Catalog | www.ajol.info |
Language | en |
Abstract | The objective of the study was to differentiate genotypes with higher efficiency and responsiveness to nitrogen supply, to understand how the nitrogen supply can impact the dry matter allocation and the accumulation of this nutrient in the different plant compartments of genotypes of conilon coffee, cultivated under contrasting conditions of nitrogen availability in the soil. The plants were cultivated during 150 days in pots containing 10 kg of soil, in greenhouse. The experiment was set up in a 13×2 factorial scheme, following a completely randomized design (CRD) with three replications. The factors were: 13 genotypes and two levels of nitrogen fertilization (0 and 100% of the N recommended level). The N supply increased between 70 and 210% of the total dry matter and between 360 and 680% of the concentration of N content in leaves of the genotypes of conilon coffee. It was possible to observe that the expression of the genotypes was modulated by the availability of N in the soil, since they presented different behaviors in the studied environments (with 0 or 100% of N supply in the soil). The genotypes CV-03, CV-07 and CV-08 were classified as non-efficient and non-responsive, while the genotypes CV- 01, CV-04 and CV-09 of conilon coffee were classified as efficient and responsive.Keywords: Alpha parameter, Coffea canephora (Pierre ex A. Froehner), mineral nutrition |
Date Added | 10/13/2021, 6:25:06 PM |
Modified | 10/13/2021, 6:25:06 PM |
Type | Journal Article |
---|---|
Author | Lima Deleon Martins |
Author | Daniel Soares Ferreira |
Author | Wagner Nunes Rodrigues |
Author | Tafarel Victor Colodetti |
Author | Sebastião Batista Brinate |
Author | Adan Dezan CÃ&go |
Author | Vanessa Maria de Souza Barros |
Author | Fábio Luiz Partelli |
Author | José Francisco Teixeira do Amaral |
Author | Marcelo Antonio Tomaz |
URL | https://academicjournals.org/journal/AJB/article-abstract/90AA8AB60968 |
Volume | 18 |
Issue | 20 |
Pages | 435-443 |
Publication | African Journal of Biotechnology |
ISSN | 1684-5315 |
Date | 2019/05/15 |
Extra | Publisher: Academic Journals |
Journal Abbr | AJB |
DOI | 10.5897/AJB2019.16796 |
Accessed | 10/13/2021, 6:25:40 PM |
Library Catalog | academicjournals.org |
Language | english, English |
Abstract | The different responses of improved genotypes to alterations of the availability of nutrients indicate that it is possible to modulate the nutritional efficiency by exploring the interaction between the intrinsic response of a genotype and the level of nutrient supply. The objective of this research was to assess the response of genotypes of Coffea arabica L., from different parental lineages, to contrasting environments for N supply, using parameters of growth and nutritional efficiency indexes to explore a possible increase in the nutritional efficiency. The experiment followed a 3×3 factorial scheme, in a completely randomized design, with 3 improved genotypes (Acauã, Katipó and Topázio) and 3 environments with different levels of N availability in the soil (50, 100 and 200% of the recommended supply). The growth and nutritional efficiency of C. arabica is influenced by the effects of the intrinsic differences among genotypes and can be modulated by changes in the environment, based on the response to different supplies of N in the soil. Genotypes from different parental linages are able to present highly contrasting responses to the fertilization with N, indicating a high variability to be explored. Among the studied genotypes, Topázio presents higher accumulation of biomass and high nutritional efficiency for absorbing, translocating and using N in environments with low fertility; while Acauã presents higher efficiency in environments with higher N supply. Key words: Coffee, genotypes, mineral nutrition, variability. |
Date Added | 10/13/2021, 6:25:40 PM |
Modified | 10/13/2021, 6:25:40 PM |
Type | Journal Article |
---|---|
Author | L.C.T. Starling |
Author | L.D. Martins |
Author | W.N. Rodrigues |
Author | T.M. Reinicke |
Author | J.F.T. do Amaral |
Author | M.A. Tomaz |
Author | M.C. Espindula |
URL | http://www.funpecrp.com.br/gmr/articles/year2018/vol17-4/pdf/gmr18121_-_variability-and-nutritional-balance-among.pdf |
Volume | 17 |
Issue | 4 |
Publication | Genetics and Molecular Research |
ISSN | 16765680 |
Date | 2018 |
Journal Abbr | Genet. Mol. Res. |
DOI | 10.4238/gmr18121 |
Accessed | 10/13/2021, 6:26:38 PM |
Library Catalog | DOI.org (Crossref) |
Language | en |
Abstract | We examined the effect of water availability on the nutritional balance of 15 genotypes of the clonal cultivar “Conilon BRS Ouro Preto” of Coffea canephora grown in two contrasting environments in terms of water availability. Biomass production and nutritional balance parameters, based on the deviance from the standard ratio among nutrients for the species, were estimated after 170 days of cultivation in these contrasting environments. The variability of responses among genotypes indicated a favorable for identifying diversity among these genotypes and for selection aiming to explore their nutritional parameters, especially for the concentration of phosphorus and magnesium in green tissues. Cultivation in the environments with low water supply caused losses up to 29% in the biomass production of the young plants (with most severe losses observed for the aerial part); the magnitude of these losses varied among genotypes. Genotypes 125 and 155 accumulated significantly higher amounts of biomass when compared to the others, regardless of the water supply. Overall, the nutritional indexes of the tested genotypes showed greater metabolic inflexibility towards water stress than what is reported for other cultivars of Robusta coffee. |
Date Added | 10/13/2021, 6:26:38 PM |
Modified | 10/13/2021, 6:26:38 PM |
Type | Conference Paper |
---|---|
Author | G H H Oliveira |
Author | P C Corrêa |
Author | F M Botelho |
Author | S C Campos |
Author | A A Paixão |
Place | Québec City, Canada |
Pages | 8 |
Date | 2010 |
Library Catalog | Zotero |
Conference Name | XVII th World Congress of the International Commission of Agricultural and Biosystems Engineering |
Language | en |
Abstract | Surface and volume measurements are important parameters that affect storage and shipping space, spray and gas applications, respiration rates, water loss or absorption data and heat and mass transfer coefficients. Also, drying models usually neglect the volume and surface alterations of agricultural products during the dehydration process, which leads to machinery and handling inefficiency. That being stated, the objective of the present work was to study the dimension alterations of Coffea Arabic L., cultivar Catuaí Vermelho. Coffee berries were dried at temperatures (T) of 35, 45, 55 and 65 ºC, along with relative humidities φ( ) of 25, 35, 45 and 55 %, totalizing 16 different conditions, with initial moisture content of 2.27 dry basis (d.b.), dried until approximately 0.11 d.b. An equation was proposed to describe the relationship among superficial area with weight values of coffee berries. Changes in the product dimensions were measured continuously during drying utilizing a digital caliper. Surface area-to-volume ratio values increased with moisture content decrease. According to statistical parameters, the empirical equation was suitable to predict surface area of coffee berries. With this result, engineers can predict the surface area of coffee through its weight, providing information that can be used to develop adequate machinery to use in harvest and postharvest procedures. |
Date Added | 10/13/2021, 6:26:39 PM |
Modified | 10/20/2021, 7:15:34 PM |
Type | Journal Article |
---|---|
Author | Bealu Girma Adugna |
Volume | 9 |
Issue | 5 |
Pages | 288-296 |
Publication | American Journal of Agriculture and Forestry |
Date | 2021 |
DOI | 10.11648/j.ajaf.20210905.12 |
Library Catalog | Zotero |
Language | en |
Abstract | Coffee (Coffea arabica L.) is the most significant crop and is consumed all over the world. Twenty-five percent of Ethiopia's population is dependent on the coffee business. Coffee quality can be affected by a variety of factors, including genetic and environmental factors, as well as the level of care given from the field to the bloodletting. On those factors, various studies have been conducted. As a result, this review aims to find out the elements that influence coffee quality in Ethiopia, as well as the analysis gap in coffee quality. Cup quality is also a fancy attribute that is influenced by several elements such as genetics, ecology, cultivation, processing method systems, and storage conditions. One of the most important stages in the preparation of any agricultural product, including coffee, is storage. The quality of coffee is affected by post-harvest operations and the plant's structure. Every stakeholder, including farmers' awareness, has played a part in Ethiopia's intriguing coffee quality. |
Date Added | 10/13/2021, 6:26:42 PM |
Modified | 10/14/2021, 3:59:06 PM |
Type | Journal Article |
---|---|
Author | Claudine Campa |
Author | Laurent Urban |
Author | Laurence Mondolot |
Author | Denis Fabre |
Author | Sandrine Roques |
Author | Yves Lizzi |
Author | Jawad Aarrouf |
Author | Sylvie Doulbeau |
Author | Jean-Christophe Breitler |
Author | Céline Letrez |
Author | Lucile Toniutti |
Author | Benoit Bertrand |
Author | Philippe La Fisca |
Author | Luc P. R. Bidel |
Author | Hervé Etienne |
URL | https://www.frontiersin.org/article/10.3389/fpls.2017.01126 |
Volume | 8 |
Pages | 1126 |
Publication | Frontiers in Plant Science |
ISSN | 1664-462X |
Date | 2017 |
DOI | 10.3389/fpls.2017.01126 |
Accessed | 10/13/2021, 6:32:43 PM |
Library Catalog | Frontiers |
Abstract | The understorey origin of coffee trees and the strong plasticity of Coffea arabica leaves in relation to contrasting light environments have been largely shown. The adaptability of coffee leaves to changes in light was tested under controlled conditions by increasing the illumination rate on C. arabica var. Naryelis seedlings acclimated to low light conditions and observing leaf responses at three different developmental stages (juvenile, growing and mature). Only mature leaves proved capable of adapting to new light conditions. In these leaves, different major mechanisms were found to contribute to maintaining a good photosynthetic level. With increased illumination, a high photosynthetic response was conserved thanks to fast nitrogen remobilization, as indicated by SPAD values and the photorespiration rate. Efficient photoprotection was accompanied by a great ability to export sucrose, which prevented excessive inhibition of the Calvin cycle by hexose accumulation. In contrast, in younger leaves, increased illumination caused photodamage, observable even after 9 days of treatment. One major finding was that young coffee leaves rely on the accumulation of chlorogenic acids, powerful antioxidant phenolic compounds, to deal with the accumulation of reactive oxygen species rather than on antioxidant enzymes. Due to a lack of efficient photoprotection, a poor ability to export sucrose and inadequate antioxidant protection, younger leaves seemed to be unable to cope with increased illumination. In these leaves, an absence of induced antioxidant enzyme activity was accompanied, in growing leaves, by an absence of antioxidant synthesis or, in juvenile leaves, inefficient synthesis of flavonoids because located in some epidermis cells. These observations showed that coffee leaves, at the beginning of their development, are not equipped to withstand quick switches to higher light levels. Our results confirm that coffee trees, even selected for full sunlight conditions, remain shade plants possessing leaves able to adapt to higher light levels only when mature. |
Date Added | 10/13/2021, 6:32:43 PM |
Modified | 10/13/2021, 6:32:43 PM |
Type | Journal Article |
---|---|
Author | Lucile Toniutti |
Author | Jean-Christophe Breitler |
Author | Hervé Etienne |
Author | Claudine Campa |
Author | Sylvie Doulbeau |
Author | Laurent Urban |
Author | Charles Lambot |
Author | Juan-Carlos H. Pinilla |
Author | Benoît Bertrand |
URL | https://www.frontiersin.org/article/10.3389/fpls.2017.02025 |
Volume | 8 |
Pages | 2025 |
Publication | Frontiers in Plant Science |
ISSN | 1664-462X |
Date | 2017 |
DOI | 10.3389/fpls.2017.02025 |
Accessed | 10/13/2021, 6:36:22 PM |
Library Catalog | Frontiers |
Abstract | Global warming is a major threat to agriculture worldwide. Between 2008 and 2013, some coffee producing countries in South and Central America suffered from severe epidemics of coffee leaf rust (CLR), resulting in high economic losses with social implications for coffee growers. The climatic events not only favored the development of the pathogen but also affected the physiological status of the coffee plant. The main objectives of the study were to evaluate how the physiological status of the coffee plant modified by different environmental conditions impact on the pathogenesis of CLR and to identify indicators of the physiological status able to predict rust incidence. Three rust susceptible genotypes (one inbred line and two hybrids) were grown in controlled conditions with a combination of thermal regime (TR), nitrogen and light intensity close to the field situation before being inoculated with the rust fungus Hemileia vastatrix. It has been demonstrated that a TR of 27-22°C resulted in 2000 times higher sporulation than with a TR of 23–18°C. It has been also shown that high light intensity combined with low nitrogen fertilization modified the CLR pathogenesis resulting in huge sporulation. CLR sporulation was significantly lower in the F1 hybrids than in the inbred line. The hybrid vigor may have reduced disease incidence. Among the many parameters studied, parameters related to photosystem II and photosynthetic electron transport chain components appeared as indicators of the physiological status of the coffee plant able to predict rust sporulation intensity. Taken together, these results show that CLR sporulation not only depends on the TR but also on the physiological status of the coffee plant, which itself depends on agronomic conditions. Our work suggests that vigorous varieties combined with a shaded system and appropriate nitrogen fertilization should be part of an agro-ecological approach to disease control. |
Date Added | 10/13/2021, 6:36:22 PM |
Modified | 10/13/2021, 6:36:22 PM |
Type | Journal Article |
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Author | Aida Esther Peñuela Martínez |
Author | Magally Romero-Tabarez |
Author | Arley David Zapata-Zapata |
URL | http://www.coffeescience.ufla.br/index.php/Coffeescience/article/view/1825 |
Rights | Copyright (c) 2021 Coffee Science - ISSN 1984-3909 |
Volume | 16 |
Pages | e161825-e161825 |
Publication | Coffee Science - ISSN 1984-3909 |
ISSN | 1984-3909 |
Date | 2021-04-16 |
DOI | 10.25186/.v16i.1825 |
Accessed | 10/13/2021, 6:36:28 PM |
Library Catalog | www.coffeescience.ufla.br |
Language | en |
Abstract | Mucilage fermentation conducted to degrade and remove coffee mucilage, is an important stage to also define coffee quality, but each microorganism’s contribution to the final quality is not yet known. Therefore, tools are needed to easily identify this relationship in order to be used to enhance coffee quality. The present manuscript describes the behavior of the microbial communities present in fermentations conducted under various conditions, which produced differences in the sensory quality of the coffee as assessed by the community-level catabolic profile approach. The coffee samples camefrom six different fermentation processes that produced coffee in two quality classifications according to the Specialty Coffee Association (SCA) protocol: very good and excellent. Functional diversity of the microbial communities and substrate consumption were compared through analysis of variance. The multidimensional scaling analysis was used to identify the similarities or differences between treatments. The indices of functional diversity revealed significantdifferences and direct proportionality with the quality rating. Diversity index (H) was between 2.09 and 2.71 and Evenness was between 1.75 and 2.21. The consumption of groups of substrates was different between fermentations, especially in carbohydrates and carboxylic acids, and the greatest consumption of these was found in the excellent-quality coffee. The different fermentative processes evaluated by this technique showed a high metabolic activity related to the great diversity of substrates given to the microbial communities and microorganisms involved, causing reactions that had influence on the final quality of the product. Key words: Catabolic profiles; Coffee quality; Diversity indices. |
Date Added | 10/13/2021, 6:36:28 PM |
Modified | 10/13/2021, 6:36:28 PM |
Type | Journal Article |
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Author | Daniel Rodríguez |
Author | José Ricardo Cure |
Author | José Miguel Cotes |
Author | Andrew Paul Gutierrez |
Author | Fernando Cantor |
URL | https://www.sciencedirect.com/science/article/pii/S0304380011004200 |
Volume | 222 |
Issue | 19 |
Pages | 3626-3639 |
Publication | Ecological Modelling |
ISSN | 0304-3800 |
Date | October 10, 2011 |
Journal Abbr | Ecological Modelling |
DOI | 10.1016/j.ecolmodel.2011.08.003 |
Accessed | 10/13/2021, 6:36:34 PM |
Library Catalog | ScienceDirect |
Language | en |
Abstract | This paper is the first of three on the coffee production system consisting of (1) the coffee plant, (2) coffee berry borer (CBB) and (3) the role of CBB parasitoids. A previous simulation model of the coffee plant was developed using data from Brazil where coffee phenology is characterized by distinct seasonal flowering (Gutierrez et al., 1998). In contrast, flowering in Colombia is continuous with low seasonality. To capture the differences in coffee phenology and growth in the two climatic regions, the Gutierrez et al. (1998) model was modified using new data from Colombia. The modifications to the model include:(1)The effect of solar radiation on floral buds initiation;(2)An age structure population model to track the daily input and development of the floral buds;(3)The effect of leaf water potential on breaking dormancy in flower buds, and hence on the timing and intensity of flowering;(4)The incorporation of both the vegetative and the reproductive demands to predict the photosynthetic rate.(5)The effect of low temperature on photosynthesis and defoliation. Other aspects of the model were re-interpreted and refinements made to generalize its structure for use across coffee varieties and geographic areas. The model, without modification, realistically simulates field data from Brazil and two Colombian locations having different varieties, patterns of rainfall and hence flowering phenology. The model will be used as the base trophic level for incorporating CBB and high tropic levels effects, and for the analysis of management options in the coffee production system. |
Short Title | A coffee agroecosystem model |
Date Added | 10/13/2021, 6:36:34 PM |
Modified | 10/13/2021, 6:36:34 PM |
Type | Journal Article |
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Author | Jorge MC Mondego |
Author | Ramon O. Vidal |
Author | Marcelo F. Carazzolle |
Author | Eric K. Tokuda |
Author | Lucas P. Parizzi |
Author | Gustavo GL Costa |
Author | Luiz FP Pereira |
Author | Alan C. Andrade |
Author | Carlos A. Colombo |
Author | Luiz GE Vieira |
Author | Gonçalo AG Pereira |
Author | Brazilian Coffee Genome Project Consortium |
URL | https://doi.org/10.1186/1471-2229-11-30 |
Volume | 11 |
Issue | 1 |
Pages | 30 |
Publication | BMC Plant Biology |
ISSN | 1471-2229 |
Date | February 8, 2011 |
Journal Abbr | BMC Plant Biology |
DOI | 10.1186/1471-2229-11-30 |
Accessed | 10/13/2021, 6:36:41 PM |
Library Catalog | BioMed Central |
Abstract | Coffee is one of the world's most important crops; it is consumed worldwide and plays a significant role in the economy of producing countries. Coffea arabica and C. canephora are responsible for 70 and 30% of commercial production, respectively. C. arabica is an allotetraploid from a recent hybridization of the diploid species, C. canephora and C. eugenioides. C. arabica has lower genetic diversity and results in a higher quality beverage than C. canephora. Research initiatives have been launched to produce genomic and transcriptomic data about Coffea spp. as a strategy to improve breeding efficiency. |
Date Added | 10/13/2021, 6:36:41 PM |
Modified | 10/13/2021, 6:36:41 PM |
Type | Journal Article |
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Author | Ramon Oliveira Vidal |
Author | Jorge Maurício Costa Mondego |
Author | David Pot |
Author | Alinne Batista Ambrósio |
Author | Alan Carvalho Andrade |
Author | Luiz Filipe Protasio Pereira |
Author | Carlos Augusto Colombo |
Author | Luiz Gonzaga Esteves Vieira |
Author | Marcelo Falsarella Carazzolle |
Author | Gonçalo Amarante Guimarães Pereira |
URL | https://doi.org/10.1104/pp.110.162438 |
Volume | 154 |
Issue | 3 |
Pages | 1053-1066 |
Publication | Plant Physiology |
ISSN | 0032-0889 |
Date | November 1, 2010 |
Journal Abbr | Plant Physiology |
DOI | 10.1104/pp.110.162438 |
Accessed | 10/13/2021, 6:36:48 PM |
Library Catalog | Silverchair |
Abstract | Polyploidization constitutes a common mode of evolution in flowering plants. This event provides the raw material for the divergence of function in homeologous genes, leading to phenotypic novelty that can contribute to the success of polyploids in nature or their selection for use in agriculture. Mounting evidence underlined the existence of homeologous expression biases in polyploid genomes; however, strategies to analyze such transcriptome regulation remained scarce. Important factors regarding homeologous expression biases remain to be explored, such as whether this phenomenon influences specific genes, how paralogs are affected by genome doubling, and what is the importance of the variability of homeologous expression bias to genotype differences. This study reports the expressed sequence tag assembly of the allopolyploid Coffea arabica and one of its direct ancestors, Coffea canephora. The assembly was used for the discovery of single nucleotide polymorphisms through the identification of high-quality discrepancies in overlapped expressed sequence tags and for gene expression information indirectly estimated by the transcript redundancy. Sequence diversity profiles were evaluated within C. arabica (Ca) and C. canephora (Cc) and used to deduce the transcript contribution of the Coffea eugenioides (Ce) ancestor. The assignment of the C. arabica haplotypes to the C. canephora (CaCc) or C. eugenioides (CaCe) ancestral genomes allowed us to analyze gene expression contributions of each subgenome in C. arabica. In silico data were validated by the quantitative polymerase chain reaction and allele-specific combination TaqMAMA-based method. The presence of differential expression of C. arabica homeologous genes and its implications in coffee gene expression, ontology, and physiology are discussed. |
Date Added | 10/13/2021, 6:36:48 PM |
Modified | 10/13/2021, 6:36:48 PM |
Type | Journal Article |
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Author | Wagner Nunes Rodrigues |
Author | Tafarel Victor Colodetti |
Author | Lima Deleon Martins |