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Coffea spp.
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Cultivation, Conservation & Ecology
Discussed the cryopreservation of seeds and seed embryos, including drying and freezing methods for species such as Coffea sp. Ballesterosq 2021
The biosynthesis of major metabolites in Coffea arabica raw beans, including chlorogenic acids, cafestol, kahweol and caffeine, were altered by environmental conditions during cultivation, including atmospheric CO2 concentrations and water regimes and their interactions. Marcheafave 2020
Variation in altitudes between 800-1400 meters affected the epiphytic microbiota of coffee beans as well as their sensorial and chemical quality among coffees grown in Serra do Caparaó, Espírito Santo, Brazil. Martins 2020
Coffea canephora has an optimal growing temperature below below 20.5°C (or a mean minimum/maximum of =16.2/24.1°C), which is markedly lower than current estimates. Kath 2020
Compared to coffee beans harvested from the upper canopy, lower canopy beans displayed more intense aroma with higher caffeine, trigonelline and sucrose contents, associated with greater gene expression in the representative metabolic pathways. Cheng 2020
Increased CO2 concentrations during cultivation affected caffeine production differently in Coffea canephora compared to Coffea arabica. Vega 2020
In 139 coffee and soil samples collected from Chiapas, Mexico, only phosphorus, potassium, calcium and copper in coffee beans had a significant relationship with the content of the same elements in soil. Texture, titratable acidity and pH-water in soil had a major influence on cup quality. Morales-Ramos 2020
Used a multidisciplinary approach (herbarium and literature review, fieldwork and DNA sequencing) to elucidate the identity, whereabouts, and potential attributes of two poorly known coffee crop species: C. affinis and C. stenophylla. Davis 2020
Investigated the effects of agricultural management on the absorption and storage of magnesium by commercial, ground, roasted Arabica coffee (Coffea arabica). Batista Dos Santos Espinelli Junior 2020
The four major fatty acids, palmitic (R = - 0.574), linoleic (R = - 0.506), stearic (R = - 0.43) and oleic acids (R = - 0.291) in green coffee beans showed a moderate negative correlation with the altitude of coffee plants. Tsegay 2020
Characterized the microbiome of civet cat feces(from which kopi luwak specialty coffee is derived). Gluconobacter genus is uniquely found in the feces of this cat. The genes in this bacteria may contribute to the fermentation of coffee beans in the GI tract of civet cats. Watanabe 2020
Studies predict that suitable coffee cultivation area could drop by ~50% under representation concentration pathway (RCP) 6.0 by 2050 for both Arabica and Robusta due to climate change. Increased temperatures will see an overall increase in mycotoxin production such as aflatoxins. Adhikari 2020
Transforming mass production of agroforestry cash crops such as coffee and cocoa towards higher socio-ecological standards includes challenges, but also novel opportunities to protect ecosystem services and human health and well-being alike. Maas 2020
Increase in air temperature exhibited a higher negative impact on production than decrease in precipitation in Coffea canephora plantations in Espírito Santo State, Brazil. Venancio 2020
Blind consensus scores for organoleptic quality of Ethiopian Arabica coffee, given by a panel of certified Q-Grade cuppers were negatively affected by increasing forest management intensity, including decreased shade levels and changing micro-climate and biotic interactions. Geeraert 2019
Application of IUCN Red List of Threatened Species criteria to all 124 wild coffee species revealed that at least 60% of these species are threatened with extinction, 45% are not held in any germplasm collection, and 28% are not known to occur in any protected area. Davis 2019
Evaluation of 13 Arabica coffee samples from different farms in different sub areas of the same municipality, Pitalito region of Huila, Colombia, indicated that differences in sensory properties could not be directly attributed to geographic areas, farming practices, or storage methods. di Donfrancesco 2019
Investigation of the establishment of the microbial communities and their prevalence during wet processing of Coffea arabica, with focus on their metabolites and those of the coffee bean metabolism and how they influence the green coffee bean metabolite profile over time. Zhang 2019
The use of starter cultures during coffee post-harvest wet process influences the amount of some important compounds related to health found in the final product, including ßN-alkanoyl-5-hydroxytryptamides and diterpenes. Tinoco 2019
Investigated bacterial and fungal communities associated with spontaneous coffee-bean fermentation in Colombia, a traditional process that has great influence on sensory quality and prestige of Colombian coffee, using Illumina-based amplicon sequencing. de Oliveira Junqueira 2019
Identified highly heritable metabolites in Coffea canephora seedlings which are linked to coffee cup quality which will accelerate the selection of C. canephora plants with desirable characteristics in focused breeding programs. Gamboa-Becerra 2019
The use of of yeast Torulaspora delbrueckii CCMA 0684 as a starter culture for wet processing of Mundo Novo and Catuai coffees improved sensory attributes of the finished product. Martins 2019
Evaluated the individual and interactive effects of altitude, shade, and postharvest processing effects on biochemical content (including caffeine, chlorogenic acid, sucrose, and acidity) and quality of coffee beans from large plantations in southwestern Ethiopia. Worku 2018
The superimposition of elevated air CO2 levels can contribute to preserving coffee bean quality by modifying and mitigating the impact of increasing air temperature on physical and chemical traits of coffee beans, which is relevant in the context of predicted climate change. Ramalho 2018
This study suggests that the post-harvest practices in Cordillera Administrative Region should focus on the removal of defective coffee in all stages of post-harvest and rapid reduction of moisture content particularly during drying in order to reduce ochratoxin A contamination. Barcelo 2018
In two coffee cultivars, sensory and chemical analyses revealed that 10 of 70 attributes of beverage quality and 18 of 154 chemical volatile compounds were significantly affected by genotype and environment. Echeverria-Beirute 2018
Comparison of two inoculation methods using a number of different yeasts for semi-dry processed coffee and the impacts on microbial population, microbial metabolism, bioactive constituent composition, and coffee quality. Martinez 2017
Case study analyzed the impact of wet and dry postharvest processing methods on the microbial community structure and in substrate and metabolite profiles during green coffee bean production, which influence the composition of the final green coffee beans.. De Bruyn 2016
Isolation of yeast strains from coffee fruits that may be used for large scale biological control of aflatoxigenic fungi in coffee beans. de Melo Pereira 2016
Mapping of coffee quality as a function of variety, altitude, and terrain aspect attributes in Zona da Mata, Minas Geras, Brazil found that the production site's position and altitude were the primary variables that influenced coffee quality. Silva 2016
Administration through floral spray of biotic and abiotic stress factors to Coffea canephora showed significant influence on major bioactive metabolites of beans. Significant elevations of caffeine, theobromine, trigonelline, cafestol, and kahweol contents elevation were evident under treatments. Vaddadi 2015
Presentation of two Agrobacterium-mediated genetic transformation techniques developed for Coffea arabica cultivated species. Déchamp 2015
Evaluation of the microbiota present during coffee wet fermentation in two distinct regions in Minas Gerais, Brazil, and the relation to their respective sensory characteristics. Evangelista 2015
Use of Pichia fermentans YC5.2 as a starter culture to conduct controlled coffee bean fermentations during on-farm wet processing. Sensory analysis demonstrated that use of this strain was favorable for the production of coffee with distinctive volatile characteristics. de Melo Pereira 2015
Saving coffee. [No abstract] Rosner 2014
Analysis of suitable growing areas for sustainable Arabica coffee production in Rwanda. Nzeyimana 2014
Evaluation of the stability and adaptability of Coffea canephora varieties (conilon coffee) in high-altitude areas, in response to global climate change. Barbosa 2014
The leaves of Coffea arabica cultivated under salt stress showed alterations in cell wall polysaccharides, increased monolignol content, and structural damage to the cells of the mesophyll. de Lima 2014
Characterization of coffee ringspot virus. Ramalho 2014
Evaluation of the vegetative and productive characteristics of 25 arabica coffee genotypes in Rio de Janeiro State, and identification of the best genotypes for this region. Rodrigues 2014
Report on the vulnerability of coffee farmers in Central America to the impact of climate change. Gross 2014
Data from a experimental study demonstrated differential expression of Coffea arabica homeologous genes under adverse environmental conditions showing that abiotic stresses can influence the homeologous gene regulation pattern, in this case, mainly on those involved in mannitol pathway. de Carvalho 2014
Investigated the endophytic diversity in cherries of Coffea arabica by using culture-independent approaches to identify the associated microbes. Results showed that the endophytic community is composed of members of the 3 domains of life - bacterial, archaeal and fungal. Oliveira 2013
There was no significant difference regarding the presence of ochratoxigenic Aspergillus ochreceus between the conventional and organic coffee cultivation systems, which suggests that the contamination risk is similar for both cultivation systems. de Fátima Rezende 2013
Linkage disequilibrium (LD) in patterns in groups of Coffea canephora Pierre has been assessed using microsatellite analysis. Cubry 2013
Dispersion and sequential sampling plan for Xylosandrus compactus (Coleoptera: Curculionidae), the black twig borer infesting Hawaii coffee plantations have been carried out. Greco 2013
Differences in evolution rates among eudicotyledon species were observed by analysis of protein divergence which showed that among the species belonging to the asterid clade, Coffea canephora appears to have evolved more slowly than the others. Cenci 2013
Chemometric discrimination of genetically modified Coffea arabica cultivars using spectroscopic and chromatographic fingerprints revealed varying caffeine concentrations in the four cultivars. Moreira 2013
A study on interactive effects among ecosystem services and management practices on crop production revealed pollination in coffee agroforestry systems as an important ecosystem service. Boreux 2013
A study on the development of coffee somatic and zygotic embryos to plants revealed to be differing in their morphological, histochemical and hydration aspects. Etienne 2013
A study on the effects of coffee management on deforestation rates and forest integrity showed that (Coffea arabica)decreases deforestation rates because of coffee's importance to local economies however coffee cover may threaten forest biodiversity, including the genetic diversity of wild coffee. Hylander 2013
Investigated the emergence of the fungus Colletotrichum kahawae using a combination of pathological, molecular and geographical data. Highlighted the role of host specialization and asexuality in the emergence of fungal pathogens through ecological speciation. Silva 2012
Robusta (Coffea canephora P.) coffee cherries evaluated for the kinetics of drying, chemical components variation, fungal growth and ochratoxinA found that slowness of drying led to an in increase in fungal development and ochratoxin A production in the cherries. Kouadio 2012
An experiment used 2 clones of Coffea canephora intercropped with shelter trees that allowed comparison of coffee bushes shaded in the morning, afternoon & full sunlight. Results showed that shading may improve the physiological performance of coffee bushes growing in harsh, tropical environments. Rodríguez-López 2012
Phenolic compounds, antioxidant activity and agronomic characters of coffee beans (Coffea arabica L. cv. Catimor) were found to be affected by different shading conditions. Higher quality coffee beans were associated with crops grown out of direct sunlight. Somporn 2012
The survival of the leaf cutting ant, Atta sexdens rubropilosa, and the effect of caffeine on in vitro growth of the mutualistic fungus was examined. Results show that the selection of different Coffea species by this leaf-cutting ant species is associated with caffeine toxicity to the fungus. Miyashira 2012
The study was carried out to determine which anthocyanins are related to the purple coloration of young leaves in Coffea arabica var. Purpurascens and assess their impact on photosynthesis as compared to C. arabica var. Catuaí, with green leaves. Domingues Júnior 2012
The combined effects of light and water availability on the functional relationships of the relative growth rate, leaf chemical composition, construction and maintenance costs, and benefits in terms of payback time for Coffea arabica are presented. Cavatte 2012
The expression stability of ten candidate reference genes (RG) using geNorm PLUS, NormFinder & BestKeeper softwares, in plants submitted to nitrogen starvation, salt and heat stress was evaluated. Two new RG in Coffea for use in data normalization in abiotic stresses: MDH and EF1 were recommended. de Carvalho 2012
Caffeine & Chlorogenic acid applied on coffee leaves stimulated locomotory activity of green scale, thus reducing feeding by insects. The elevation of caffeine & chlorogenic acid levels in coffee leaves affect the insect Coccus viridis by stimulating locomotion of crawlers. Fernandes 2012
A combination of pathological, molecular & geographical data was used to investigate the recent emergence of the fungus Colletotrichum kahawae & it emerged as a specialist pathogen causing coffee berry disease in Coffea arabica, owing to its unparalleled adaptation of infecting green coffee berries. Silva 2012
A study on efficacy of traps, lures, and repellents for Xylosandrus compactus (Coleoptera: Curculionidae) and other ambrosia beetles on Coffea arabica plantations and Acacia koa nurseries in Hawaii showed the importance of developing a combination of several monitoring techniques. Burbano 2012
Three coffee pests and pathogens, with limited or no pressure from host-specific natural enemies and widely varying life histories, were studied. Landscape context and scale were found to differentially impact coffee leaf rust, coffee berry borer and coffee root-knot nematodes. Avelino 2012
The study establishes a fundamental baseline for assessing the consequences of climate change on wild populations of Arabica coffee. Davis 2012
Sun-grown plants displayed osmotic adjustments, decreased tissue elasticities and improved long-term water use efficiencies, especially under drought. Shading did not alleviate the negative impacts of drought on the coffee tree. Cavatte 2012
The coffee berry borer, Hypothenemus hampei (Ferrari) (Coleoptera: Curculionidae) is endemic to Africa and is the most devastating pest of coffee worldwide and was found to exist in coffee fruits in Kona, Hawaii in August 2010. Burbano 2011
Plant response to inoculation with different arbuscular mycorrhizal (AM) strains in coffee plantations planted with coffee found that AM fungal strains in target soil environments may well be the key for efficient management of the AM symbiosis in plant production. Herrera-Peraza 2011
The coffee berry borer, Hypothenemus hampei (Ferrari) (Coleoptera: Curculionidae) is endemic to Africa and is the most devastating pest of coffee worldwide. Burbano 2011
Cascading indirect effects in a coffee agroecosystem: effects of parasitic phorid flies on ants and the coffee berry borer in a high-shade and low-shade habitat. Pardee 2011
In a large coffee plantation in Hawaii with high & low populations of Mediterranean fruit fly, Ceratitis capitata, relative attractiveness of GF-120 NF Naturalyte Fruit Fly Bait as either a 40%v/v spray solution or as a formulated proprietary amorphous polymer matrix was compared. Piñero 2011
Coffee contamination by ochratoxigenic fungi affects both coffee quality as well as coffee price with harmful consequences. Fungal strains were isolated from coffee beans and identified as black Aspergilli. Djossou 2011
It is suggested that iron induces oxidative stress in Coffea arabica L. cell suspension cultures and that ferritin participates in the antioxidant system to protect cells against oxidative damage. Bottcher 2011
The expression patterns of three isoforms of galactinol synthase (CaGolS1-2-3) from Coffea arabica were evaluated in response to water deficit, salinity and heat stress. dos Santos 2011
Experiment was carried out to evaluate the effect of top-dressing application of Fe- and Zn-enriched coffee grounds and tea leaf wastes at the panicle initiation stage on the mineral content of rice grains and the yield of paddy rice. Morikawa 2011
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. Poltronieri 2011
Low international coffee prices and high labor demand outside the community pull farmers out of agriculture, but a diversification in income sources prevents land abandonment and contributes to maintaining rural populations and coffee forest gardens. Aguilar-Støen 2011
Research has been focused on aluminum toxicity mechanisms in Coffea arabica suspension cells as a model for developing future contributions to the biotechnological transformation of coffee crops to be made resistant to aluminum toxicity. Poot-Poot 2011
Warmer climates increase the coffee berry borer pest damage to crops in East Africa. Study suggests the best way to adapt to a rise of temperatures in coffee plantations could be via the introduction of shade trees in sun grown plantations. Jaramillo 2011
Evaluated the impact and contribution of various drying surfaces (soil, cement, and tarpaulin) and raking frequencies (1 and 4/day) on the incidence of toxigenic molds, ochratoxin A (OTA) production, and on the overall cup quality during preparation of arabica and robusta coffee cherry in India. Velmourougane 2010
Disposable bioreactors for plant micropropagation & mass plant cell culture of Coffea canephora was developed. Ducos 2010
A study revealed the production of transgenic coffee plants with biotechnological potential to control coffee berry borer. Alpha-amylase inhibitor-1 gene from Phaseolus vulgaris expressed in Coffea arabica plants is shown to inhibit alpha-amylases from the coffee berry borer pest. Barbosa 2010
Experiments were carried out using 1.5-year-old coffee seedlings of Coffea canephora cv. Apoatã, C. arabica cv. Catuaí, C. dewevrei & 2 hybrids, Icatu (C. arabicax, C. canephora) & Piatã (C. dewevreix, C. arabica) subjected to a gradual cold treatment and a recovery period. Fortunato 2010
A 3 year evaluation of the impact of Coffee berry borer (CBB) on the microbial contamination of Arabica and Robusta coffee bean varieties showed higher microbial contamination in CBB-infested beans in both the varieties of coffee with the presence of toxigenic molds. Velmourougane 2010
Copper & zinc uptake & some biochemical and physiological traits were studied in thirty-week old Coffea arabica seedlings, in response to the inoculation with arbuscular mycorrhizal fungi (AMF). AMF was found to protect coffee seedlings from metal toxicity. Andrade 2010
The effects of increasing plant diversity on the population of the coffee leaf-miner Leucoptera coffeella (Guérin-Mèneville) were investigated in two organic coffee production systems. [Article in Portuguese] Amaral 2010
The abundance, diversity, and species composition of wood-nesting ants and frequency of parasitism of poneromorph ants in coffee agroeco systems and a forest fragment in Chiapas, Mexico were studied. De La Mora 2010
Five Coccus on Coffea arabica from the states of Bahia, Espírito Santo and Minas Gerais were studied. Coccus alpinus and C. celatus are new records for Brazil and the Neotropical Region. [Article in Spanish] de Willink 2010
Aqueous solutions of neem oil & aq. extracts of neem seeds & leaves were sprayed on coffee fruits were found effective in reducing infestation of the coffee borer, Hypothenemus hampei (Ferrari). [Article in Portuguese] Depieri 2010
Investigated electrophysiological and behavioral responses of Hypothenemus hampei, a coffee berry borer, to volatiles of different phenological stages of Coffea arabica fruits in order to identify volatile semiochemicals used in host location. Mendesil 2009
A near infrared spectroscopy signature, acquired over a set of harvests, can effectively characterize a coffee variety and how the typical signature can be used in breeding to assist in selection. Posada 2009
Environmental temperature during the development of coffee beans were found to have a dramatic influence on their fatty acid composition and analysis of climate patterns over years helped understand the efficient location discrimination within a single year but only moderate efficiency across years. Villarreal 2009
A study on the proteomic evaluation of coffee zygotic embryos in 2 different stages of seed development showed that all proteins identified seem to affect coffee development by directly involving plant growth or used as an intermediate in some metabolic pathway. Franco 2009
Using a Coffea arabica suspension cell model, it is demonstrated that cell growth inhibition by aluminum (Al) toxicity is mitigated at a high phosphate concentration & suggested that Al-induced cell growth inhibition is not linked to phospholipase C inhibition. Chee-González 2009
Liquid chromatography (LC) with high-resolution mass spectrometric (HRMS) detection showed that 67% of Aspergillusniger isolates from coffee beans were capable of producing fumonisins B(2) (FB(2)) and B(4) when grown on Czapek Yeast Agar with 5% NaCl. Noonim 2009
Measurements on coffee leaves (Coffea arabica L.) demonstrate that the dielectric material parameters can be employed to determine the leaf water status and, therefore, to monitor drought stress in plant leaves. Jördens 2009
Higher pluvial precipitation, solar radiation & irrigation depths reduced population density of coffee leaf miner. Furthermore, the increase in density of the predatory wasps was found to be dependent on the population level of L. coffeella. [Article in Portuguese] Fernandes 2009
[Coffee growers feel the heat.] No abstract available. Gross 2009
Assessed the effects of shade on bean characteristics and sugar metabolism by analyzing tissue development, sugar contents, activities of sucrose metabolizing enzymes and expression of sucrose synthase-encoding genes in fruits of Coffea arabica submitted to full sun/shade conditions. Geromel 2008
Assessed the effects of shade on bean characteristics and sugar metabolism by analyzing tissue development, sugar contents, activities of sucrose metabolizing enzymes and expression of sucrose synthase-encoding genes in fruits of Coffea arabica plants submitted to full-sun and shade conditions. Geromel 2008
It is shown that when the induction of somatic embryogenesis in Coffea 1canephora is carried out under light conditions and in the presence of the plant growth regulator, benzylaminopurine, a cytokinin, a faster response to induction is obtained. De-la-Peña 2008
Study confirmed that the hypothesis that caffeine in coffee leaves stimulates egg-laying by the coffee leaf miner. Magalhães 2008
The transmission efficiency of Xylella fastidiosa, a bacterial pathogen, in coffee & citrus by Cicadellini and Proconiini sharpshooters that occur in both crops was compared. Marucci 2008
Coffee seed germination is the result of isodiametric growth of the embryo followed by elongation, at the expense of integrity of endosperm cap cells. The cell cycle, including cell division, is initiated prior to radicle protrusion. Da Silva 2008
Limitations to photosynthesis were explored in leaves from 4 canopy positions of field-grown, unshaded coffee (Coffea arabica L.), a tropical tree species classified as shade-obligatory & found that there was no major difference in photosynthetic capacity between sun & shade leaves. Araujo 2008
Study examined the role of organic acids in the tolerance mechanism of a cell suspension line of coffee, Coffea arabica that exhibits Al-tolerance finding that this plant Al-tolerance may be associated with down-regulation of malate dehydrogenase and citrate synthase activities. Ramírez-Benítez 2008
The coffee agroforestry system provides an ideal platform for the study of spatial ecology. The uniform pattern of the coffee plants and shade trees allows for the study of pattern generation through intrinsic biological forces rather than extrinsic habitat patchiness. Perfecto 2008
A study was carried out to set up proliferation conditions for hairy roots of Coffea arabica regenerated after transformation by Agrobacterium rhizogenes strain A4-RS, & to carry out morphological and molecular characteristics of hairy root clones maintained over long term. Alpizar 2008
The effectiveness of 3 chemical families, namely, chlorogenic acids, fatty acids, and elements, for the discrimination of Arabica varieties (traditional versus modern introgressed lines) and potential terroirs within a given coffee-growing area was compared. Bertrand 2008
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. DaMatta 2008
Morphometric studies of 5 allopatric parasitoid populations from coffee plantations in Cameroon, Ghana & Kenya & one non-coffee population from Kenya were compared with individuals of Psyttalia concolor. Billah 2008
[Shade coffee farms promote genetic diversity of native trees.] No abstract available. Jha 2008
To assess the specific effect of shade, in situ and in vitro disease development was compared between coffee trees shaded artificially by a net and trees located in full sunlight. Coffee shading mainly acts on environmental parameters in limiting disease incidence. MouenBedimo 2008
Using coffee cell suspension as a model, the contribution of the ureides allantoin (ALN) as a source of nitrogen (N) in coffee was investigated. The results showed that despite being taken up by cells ALN does not contribute significantly as a source of N in coffee cells. Filippi 2007
The removal of natural organic matter (NOM) present in coffee processing waste water through chemical coagulation-flocculation & advanced oxidation processes was studied. The effectiveness of removal of NOM using flocculants & UV/H2O2, UV/O3 & UV/H2O2/O3 processes was determined. Zayas Pérez 2007
Changes in temperature, relative humidity, & moisture content of green coffee beans were monitored during transportation of coffee from Brazil to Italy. Ochratoxin A production occurred in coffee located at the top of the container on the deck and in the wet bags from the hold. Palacios-Cabrera 2007
Lipoxygenase presence was investigated in coffee berries to determine its involvement in lipid degradative metabolism of plants grown in organic and conventional cultivations. Patui 2007
The infestation indices by fruit flies were determined for 6 cultivars of Coffea arabica L. in shaded and unshaded systems under organic management. The experiment was set in a completely randomized design with a split-split-plot arrangement and 4 replicates. [Article in Portuguese] Aguiar-Menezes 2007
The entomopathogenic fungus Beauveria bassiana was established in coffee seedlings after fungal spore suspensions were applied as foliar sprays, stem injections, or soil drenches. Posada 2007
When the chemical composition of secondary metabolites from the Pleurotussajor-caju growing on coffee pulp were studied, it was found that the fungus has the faculty of incorporating caffeine inside its fructiferous body. [Article in Spanish] Nieto Ramírez 2007
Empirical data on the negative effects of increasing forest distance on both pollinator diversity and fruit set of coffee was used to estimate future changes in pollination services for different land use scenarios in Sulawesi, Indonesia. Priess 2007
The coherence of germination-related metabolism and of expression-specific coffee qualities establishes the basis for a novel approach in coffee research. Bytof 2007
Survey of Vietnamese coffee beans for the presence of ochratoxigenic Aspergilli indicates no ochratoxin A (OA) -producing fungi were uncovered in a fresh coffee bean sample analysed, suggesting that the OA problem most likely occurs post-harvest. Ilic 2007
An assay developed that allows screening of numerous green coffee samples for effective catalase activities (CAT). Nearly all Arabicas (22 of 23) harbored high CAT activity levels, whereas all Robustas harbored low ones, pointing to an effective method to assay CAT activities in plant tissues. Montavon 2007
Evaluated the effect of the frequency of the mixing of coffee cherries put out for sun drying on the kinetics of the drying, fungal growth and kinetics of ochratoxin A production. The results showed that the more coffee cherries were mixed, the quicker they dried and the less fungal growth occurred. Kouadio 2006
Somatic embryogenesis (SE) provides a useful model to study embryo development in plants & it is a simplified method to obtain a faster and more efficient protocol to produce direct somatic embryos in Coffea canephora. Quiroz-Figueroa 2006
The effect of the frequency of the mixing of coffee cherries put out for sun drying on the kinetics of the drying, fungal growth & kinetics of ochratoxin A production was evaluated. The results showed that the more coffee cherries were mixed, the quicker they dried. Kouadio 2006
Study establishes for the first time that tolerance of coffee seeds to liquid nitrogen exposure depends on the initial quality of the seedlot and on the rewarming regime employed. Dussert 2006
The antioxidant responses of coffee (Coffea arabica L.) cell suspension cultures to nickel were investigated which showed that nickel elicits a fast antioxidant response in Coffea arabica cells. Gomes-Junior 2006
Tissues from Coffea arabica, C. congensis, C. dewevrei & C. liberica collected in Colombia, Hawaii and at a local plant nursery in Maryland were sampled for the presence of fungal endophytes. Vega 2006
In a study of yeasts involved in coffee fermentation high amounts of polygalacturonase were produced by 2 strains of P. anomala and P. kluyveri suggesting that these strains may be influential in the degradation of pectin during coffee fermentation. Masoud 2006
Early intercellular signaling in Coffea arabica L.-Hemileia vastatrix host-pathogen interaction was studied, using inside-out plasma membrane from two varieties of coffee leaf and a fungal fraction to determine the plant's biochemical responses. Osses 2006
Investigation of the antioxidant responses of coffee (Coffea arabica L.) cell suspension cultures to cadmium (Cd) suggest that the higher concentrations of CdCl(2) may lead to oxidative stress. Gomes-Junior 2006
Effects of elevation and variety on coffee bean biochemical composition and beverage quality were evaluated on Arabica hybrids involving Sudanese-Ethiopian origins in Central America. Bertrand 2006
An Agrobacterium rhizogenes-mediated transformation protocol was developed for Coffea arabica enabling efficient and rapid regeneration of transformed roots from the hypocotyls of germinated zygotic embryos, and the subsequent production of composite plants. Alpizar 2006
Source-sink relationships of field-grown plants of Coffea arabica L. cultivar 'Caturra' were manipulated to analyze the contribution of soluble sugars to sink feedback down-regulation of maximal leaf net CO2 assimilation rate (Amax). Franck 2006
The effects of P. anomala, P. kluyveri and H. uvarum predominant during coffee processing on growth of A. ochraceus and production of ochratoxin A (OTA) on malt extract agar and coffee agar (CA) were studied. On CA medium, P. anomala and P. kluyveri prevented A. ochraceus from producing OTA. Masoud 2006
Coffee wilt disease, attributed to Gibberella xylarioides (Fusarium xylarioides), has caused losses to coffee production in Africa since 1927 but has been largely contained through the use of host resistance and in some instances wide-scale sanitation practices. Rutherford 2006
Investigation was carried out in the plants and in the soil surface, for the presence of Coffea canephora cv. Conilon berries bored by Hypothene mushampei during the yielding period in OuroPretod'Oeste, Rondônia, Brazil.[Article in Portuguese] Teixeira 2006
A study was carried out to evaluate the residues and the translocation of the insecticide thiamethoxam in coffee leaves, as well as to study its effect on the coffee leaf miner control, comparing it with aldicarb, used as standard. [Article in Portuguese] Diez-Rodrĩguez 2006
A low cost treatment found to reduce growth of Xylella fastidiosa on citrus (Citrus sinensis) & coffee (Coffea arabica) plants affected by citrus variegated chlorosis & coffee leaf scorch. Lopes 2006
Adults of Cephalonomia stephanoderis Betrem were detected (in Nov. 2003) during the sampling of Coffea canephora Pierre ex A. Froehner berries damaged by Hypothene mushampei Ferrari (Coleoptera: Scolytidae) in OuroPretoD'Oeste -Rondônia, Brazil.[Article in Portuguese] de Souza 2006
Colletotrichum gloeosporioides can overwhelm C. kahawae under conditions of higher environmental temperature and humidity and may enhance the coffee berry disease infection process under field conditions. Chen 2005
It is found that drought tolerance is associated with rooting depth and stomatal control of water use in clones of Coffea canephora. Pinheiro 2005
The effects of volatile compounds produced during coffee processing by Pichia anomala, P. kluyveri and Hanseniaspora uvarum on growth of Aspergillus ochraceus and production of ochratoxin A (OTA) were studied. Masoud 2005
Penicillium coffeae is described as a novel endophyte isolated from a Coffea arabica L. plant in Hawaii. Phylogenetic analysis using three loci shows that P. coffeae forms a strongly supported clade with P. fellutanum, P. charlesii, P. chermesinum, P. indicum, P. phoeniceum and P. brocae. Peterson 2005
It is shown that alpha-galactosidase activities in field-grown coffee beans are variable amongst cultivars of the two species investigated (Coffea arabica and C. canephora var. Robusta). Higher activities were found in Arabica cultivars. Marraccini 2005
The potential of the eulophid parasitoid Phymastichus coffea LaSalle to control coffee berry borer Hypothenemus hampei (Ferrari) populations under field conditions in Colombia was evaluated. Jaramillo 2005
Epiphytic & endophytic fungal communities associated with leaves of Coffea arabica in Puerto Rico were compared. This is the first quantitative comparison of epiphytic & endophytic fungal floras in any plant, & the first to examine endophytic or epiphytic fungi in leaves of coffee. Santamaría 2005
Increasing fruit load (from no berries present to 25, 50 & 100% of the initial fruit load) significantly decreased branch growth on 5-year-old coffee (Coffea arabica L.) trees of the dwarf cultivar 'Costa Rica 95', during their third production cycle. Vaast 2005
The mechanism of inhibition of coffee (Coffea arabica cv. Rubi) seed germination by exogenous gibberellins (GAs) and the requirement of germination for endogenous GA were studied. da Silva 2005
Effects of varied levels of nitrogen (N), phosphorus (P), potassium (K) nutrients on the growth, photosynthetic characteristics and yield in three-year old saplings of Coffea arabica with the density of 4500 individuals per hectare were measured. [Article in Chinese] Cai 2005
Using pollination experiments along replicated distance gradients, it is found that forest-based pollinators increased coffee yields by 20% within approximately 1 km of forest. It also improved coffee quality near forest by reducing the frequency of "peaberries" (i.e., small misshapen seeds) by 27%. Ricketts 2004
Study results indicate that wet season is the optimum time for the photosynthesis & growth of Coffea arabica, and the requirement for a high fertilization investment & fine watering management during the whole growth period. [Article in Chinese] Cai 2004
The mechanism and regulation of coffee seed germination were studied in Coffea arabica L. cv. Rubi. It was found that there was a transient rise in abscisic acid content in the embryo during imbibition, which was likely to be responsible for slow germination. da Silva 2004
In a study examining the economic value of coffee production to tropical forests found that forest-based pollinators increased coffee yields by 20% within 1 km of forest and the value is commensurate with expected revenues from competing land uses and exceeds conservation incentive payments. Ricketts 2004
A naturally decaffeinated Coffea arabica plant from Ethiopia, recognized for high quality of its beans was discovered. It is possible to transfer this trait to commercial varieties of C.arabica. Silvarolla 2004
Two experiments were conducted to assess nutrient partitioning in coffee (Coffea arabica cv. Typica land race Guatemala) infected with Meloidogyne konaensis. Nutrient levels were quantified from soil, roots, and leaves. Hurchanik 2004
Production losses caused by the coffee berry borer (Coleoptera: Scolytidae) was estimated and calculation of an economic damage threshold in Togolese coffee plots was carried out. Wegbe 2003
Four different green coffee samples, naturally contaminated with ochratoxin A, were submitted to different roasting conditions (light, medium & dark) & analyzed for roasting parameters (weight loss, color change, density & moisture content) & ochratoxin A content. Romani 2003
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. de Lima Filho 2003
Flow cytometry was conducted to evaluate genome size diversity among African diploid species of the Coffea genus. The study included 15 species and six new taxa from Congolese and Cameroonian forest regions which have yet to be botanically characterized. Noirot 2003
An interspecific cross (BC 1) involving a species with one of the largest genomes in the Coffea genus [ Coffea heterocalyx , qDNA = 1.74 pg] & a species with a medium-sized genome [ Coffea canephora, qDNA = 1.43 pg] was studied using two types of molecular markers, AFLP & SSR. Coulibaly 2003
Investigation of the role of caffeine as a chemical defense of coffee against the berry borer Hypothenemus hampei indicated that H. hampei has evolved an adaptation to handle the toxic effects of caffeine. Guerreiro Filho 2003
Study was carried out to evaluate ochratoxin A contamination in green coffee obtained by different harvesting and drying operations and from fruits of different ripening stages in order to identify hazards. Paulino De Moraes 2003
Free radicals in two cultivars of Indian monsooned coffee beans, gamma-irradiated for hygienic and quarantine purposes, were examined by entrapping the small amount of samples in potassium chloride powder in ESR quartz tubes. Bhushan 2003
It is shown that fruit set of the self-fertilizing highland coffee (Coffea arabica) is highly variable and related to bee pollination. The results give empirical evidence for a positive relationship between ecosystem functions such as pollination and biodiversity. Klein 2003
It is found that increased lipid synthesis, lower MGDG/DGDG ratio, and changes in membrane unsaturation occurring during acclimation to low temperatures may be critical factors in maintenance of cellular integrity under chilling in leaves of five Coffea genotypes. Campos 2003
[Conservation. Caffeine and conservation.] No abstract available. O'Brien 2003
The relative importance of insect, wind, and spontaneous self-pollination and the degree of self-fertility of Coffea canephora and C. arabica in 24 agroforestry coffee fields in Indonesia were studied. In both species, open pollination and cross pollination by hand led to the highest fruit set. Klein 2003
Evidence of host specialization within the Latin American clade of Ceratocystis fimbriata was demonstrated in inoculation experiments in growth chambers of several plants including Coffea arabica. Baker 2003
[Bacterial present in the xylem of coffee (Rubiaceae: coffea arabica) with "Crespera" disease]. [Article in Swedish] Vargas Cartagena 2002
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. Barry-Etienne 2002
Coffeaa robusta somatic embryos were cultured and development of stomata, rate of CO2 fixation or production, chlorophyll content and chlorophyll fluorescence were studied in embryos at different stages of development. Afreen 2002
The field studies of organically shade-grown coffee indicate that coffee plants would benefit from being grown in habitats that are suitable for sustaining valuable pollinators. Roubik 2002
Nitrate adsorption was evaluated beneath two coffee (Coffea arabica L.) plantations in the Central Valley of Costa Rica and found that evaluation of local and landscape scales would be useful in development of nitrogen management practices to reduce nitrate leaching to ground water. Ryan 2002
The study attempted to isolate thermophilic fungi from raw coffee beans. The material constituted of 24 coffee beans samples from 12 countries. The isolation and identification of above fungi was conducted according to Biłaj [2], Biłaj & Zacharczenko [3]. [Article in Polish] Falkowski 2002
It is found that it is possible to generate coffee trees commercially with normal agronomic performance from embryogenic suspensions, because the frequency with which somaclonal variants occur is limited. Etienne 2001
The effect of exposure to ultra-low temp. on viability of seeds desiccated to various water contents was investigated in 9 coffee species. Correlation was found between the percentage of unsaturated fatty acids and the percentage of seedling recovery after rapid or slow cooling. Dussert 2001
The work aimed at investigating the effect of osmoconditioning on the germination of cryo preserved seeds of Coffea arabica, whose viability and vigour are drastically affected by cryo-preservation. Dussert 2000
The magnitude and diversity of the microbial population associated with dry (natural) processing of coffee (Coffea arabica) has been assessed during a 2-year period on 15 different farms in the Sul de Minas region of Brazil. Silv 2000
Production of ochratoxin on media by 8 isolates of Aspergillus ochraceus from coffee or its processing environment in several countries were compared with yields in shaken fermentation on shredded wheat and coffee (Coffea arabica) in reference to coffee spoilage. Mantle 2000
It is found that hydraulic architectural traits, rate of water use per plant and crown architecture are important determinants of short- and long-term variations in the water balance of Coffea arabica. Tausend 2000
An experiment was conducted in a greenhouse to determine the effects of Pratylenchus brachyurus & P. coffeae on seedlings of Coffea arabica. Both Pratylenchus spp. reduced the growth of coffee seedlings and higher amounts of soluble sugars were found in the leaves of infected plants. Inomoto 1998
Acetobacter diazotrophicus was isolated from coffee plant tissues and from rhizosphere soils. Isolation frequencies ranged from 15 to 40% and were dependent on soil pH. Jimenez-Salgado 1997
In root tip segments of coffee seedlings which were subjected for 6 days to temperatures of 10, 15, 20 and 25 degrees C, in darkness, we have detected an increased amount of malondialdehyde formed in the 10 degrees C treatment, accompanied by higher electrolyte leakage. Alonso 1997
Commercially available sap flow gauges were used to evaluate the performance of the stem heat balance technique for measuring sap flow in coffee (Coffea arabica L. cv. Yellow Catuai) and koa (Acacia koa Gray) plants under greenhouse and field conditions. Gutiérrez 1994
The capacity of Coffea arabica leaves (5- x 5-mm pieces) to synthesize de novo and catabolize purine nucleotides to provide precursors for caffeine (1,3,7-trimethylxanthine) was investigated. Nazario 1993
It is suggested that osmotic and elastic adjustment contributed to maintenance of gas exchange in droughted coffee leaves probably through their effects on symplast volume rather than turgor. Meinzer 1990
Photosynthetic gas exchange, plant-water relations characteristics, and stable carbon isotope discrimination (Delta) were evaluated for five Coffea arabica L. genotypes growing under two soil moisture regimes in the field. Meinzer 1990
The course of attacks by anthracnosis and by the eye spot disease on branches, leaves, and fruits of Coffea arabica L. was investigated in Cuba. The daily precipitation and the shading are most influential for both diseases. [Article in German] Tenckhoff 1982
[On the distribution of caffeine in Coffea robusta. Presence of theobromine in the young leaves]. [Article in French] No abstract available. Paris 1966
Erosion and nutrient loss reduction with an alternative planting method for coffee (Coffea arabica) USDA
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ORIGINAL RESEARCH BY: J. Mohanasundaram, MD, PhD
April 2013
May 2019
LATEST UPDATES BY: Oren Rabinowitz, MSc
December 2020