A5060084434- Coffee research and impacts
- Plant tissue culture and regeneration
- Cocoa and Sweet Potato Agronomy
- Plant Virus Research Studies
- Transgenic Plants and Applications
- Nematode management and characterization studies
- CRISPR and Genetic Engineering
- Plant Pathogens and Fungal Diseases
- Organic Food and Agriculture
- Growth and nutrition in plants
- Agriculture and Rural Development Research
- Agriculture, Land Use, Rural Development
- Food Chemistry and Fat Analysis
- Plant Disease Management Techniques
- Fermentation and Sensory Analysis
- Chromosomal and Genetic Variations
- Seed Germination and Physiology
- Legume Nitrogen Fixing Symbiosis
- Biofuel production and bioconversion
- Plant-Microbe Interactions and Immunity
- Light effects on plants
- Global trade, sustainability, and social impact
- Sugarcane Cultivation and Processing
- Agronomic Practices and Intercropping Systems
- Cassava research and cyanide
Institut de Recherche pour le Développement
2015-2024
Centre de Coopération Internationale en Recherche Agronomique pour le Développement
2015-2024
Université de Montpellier
2011-2024
Diversité, adaptation et développement des plantes
2013-2024
Agropolis International
2002-2022
Weatherford College
2021
Université de Lille
2019
Laboratoire des Interactions Plantes Micro-Organismes
2015-2017
Diversité, génomes et interactions micro-organismes-insectes
2017
Interactions Arbres-Microorganismes
2015-2017
Abstract Under two contrasting light regimes (full sun and 45% shade) the optimal coffee‐growing conditions of central valley Costa Rica, production pattern, bean characteristics beverage quality were assessed over cycles on dwarf coffee ( Coffea arabica L. cv. Rica 95) trees with varying fruit loads (quarter, half full loads) imposed by manual thinning. Shade decreased tree productivity 18% but reduced alternate bearing. positively affected size composition as well delaying berry flesh...
Considerable success has been obtained in the use of classical breeding to control economically important plant diseases, such as coffee leaf rust and berry disease (CBD). There is a strong consensus that growing genetically resistant varieties most appropriate cost effective means managing diseases one key components crop improvement. It also recognized better knowledge both, pathogens defence mechanisms will allow development novel approaches enhance durability resistance. After brief...
Coffee quality, in the present context of overproduction worldwide, has to be considered as a main selection criterion for coffee improvement. After definition and an overview non genetic factors affecting its variation, this review focuses on involved control quality variation. Regarding complexity trait, different types are first presented. Then, great variation within between species is underlined, mainly biochemical compounds related (caffeine, sugars, chlorogenic acids, lipids). The...
The genome of the allotetraploid species Coffea arabica L. was sequenced to assemble independently two component subgenomes (putatively deriving from C. canephora and eugenioides) perform a genome-wide analysis genetic diversity in cultivated coffee germplasm wild populations growing center origin species. We assembled total length 1.536 Gbp, 444 Mb 527 which were assigned eugenioides subgenomes, respectively, predicted 46,562 gene models, 21,254 22,888 eugeniodes subgenome, respectively....
The objective of this work was to compare the effectiveness three chemical families, namely, chlorogenic acids, fatty and elements, for discrimination Arabica varieties (traditional versus modern introgressed lines) potential terroirs within a given coffee-growing area. experimental design included Colombian locations in full combination with five (one traditional four introgressed) two field replications. Chlorogenic elements were analyzed coffee bean samples by HPLC, GC, ICP-AES,...
Following genome sequencing of crop plants, one the main challenges today is determining function all predicted genes. When gene validation approaches are used for woody species, obstacle low recovery rate transgenic plants from elite or commercial cultivars. Embryogenic calli have frequently been target tissue transformation, but difficulty in producing maintaining embryogenic tissues problems encountered genetic transformation many including Coffea arabica.We identified conditions required...
• Polyploidy occurs throughout the evolutionary history of many plants and considerably impacts species diversity, giving rise to novel phenotypes leading ecological diversification colonization new niches. Recent studies have documented dynamic changes in plant polyploid gene expression, which reflect genomic functional plasticity duplicate genes genomes. The aim present study was describe expression dominance between a relatively recently formed natural allopolyploid (Coffea arabica) its...
Embryogenic suspensions that involve extensive cell division are risky in respect to genome and epigenome instability. Elevated frequencies of somaclonal variation embryogenic suspension-derived plants were reported many species, including coffee. This problem could be overcome by using culture conditions allow moderate proliferation. In view true-to-type large-scale propagation C. arabica hybrids, suspension protocols based on low 2,4-D concentrations short proliferation periods developed....
Long-term cell cultures were used in coffee to study the cytological, genetic and epigenetic changes occurring during culture ageing. The objective was identify mechanisms associated with somaclonal variation (SV). Three embryogenic lines established Coffea arabica (2n = 4x 44) somatic seedlings regenerated after 4, 11 27 months. Phenotyping AFLP, MSAP, SSAP molecular markers performed on 199 124 plants, respectively. SV only observed from 27-month-old cultures, affecting 30 94 % of...
Global warming is a major threat to agriculture worldwide. Between 2008 and 2013, some coffee producing countries in South Central America suffered from severe epidemics of leaf rust (CLR), resulting high economic losses with social implications for growers. The climatic events not only favoured the development pathogen but also affected physiological status plant. main objectives study were evaluate how plant modified by different environmental conditions impact on pathogenesis CLR identify...
Summary Polyploidy has occurred throughout the evolutionary history of plants and led to diversification plant ecological adaptation. Functional plasticity duplicate genes is believed play a major role in environmental adaptation polyploids. In this context, we characterized genome‐wide homoeologous gene expression Coffea arabica , recent allopolyploid combining two subgenomes that derive from closely related diploid species, investigated its variation response changing environment. The...
Abstract Conventional American cultivars of coffee are no longer adapted to global warming. Finding highly productive and stable in different environments without neglecting quality characteristics has become a priority for breeders. In this study, new Arabica F1 hybrids clones were compared conventional varieties seven contrasting environments, yield, rust incidence volume the canopy. The was assessed through size, weight 100 beans, biochemical analysis (24 aroma precursors 31 volatiles...
Abstract The coffee research community has maintained a long ongoing debate regarding the implications of shade trees in production. Historically, there been contrasting results and opinions on this matter, thus recommendations for use (namely agroforestry systems) are often deemed controversial, particularly due to potential yield declines farmers’ income. This study is one first demonstrating how several Coffea arabica cultivars respond differently with respect yield. By standardising more...
Abstract Background Somatic embryogenesis (SE) is one of the most promising processes for large-scale dissemination elite varieties. However, many plant species, optimizing SE protocols still relies on a trial and error approach. We report first global scale transcriptome profiling performed at all developmental stages in coffee to unravel mechanisms that regulate cell fate totipotency. Results RNA-seq 48 samples (12 × 4 biological replicates) generated 90 million high quality reads per...
Abstract Background The fruity aromatic bouquet of coffee has attracted recent interest to differentiate high value market produce as specialty coffee. Although the volatile compounds present in green and roasted beans have been extensively described, no study yet linked varietal molecular differences greater abundance specific substances support aroma specificity coffees. Results This compared four Arabica genotypes including one, Geisha Especial, suggested generate Formal sensory...
Coffea arabica F1 hybrids derived from crosses between wild Sudan-Ethiopian and American cultivars propagated by somatic embryogenesis have been obtained in Central America. These new considerably enhanced the genetic diversity of coffee region. We conducted 15 trials to assess whether using represents substantial progress terms productivity agroforestry full-sun cropping systems. The germplasm was grown same conditions as best cultivar (homozygous pure lines). results showed that yields...
In Coffea arabica L., the development of direct sowing somatic embryos (SE) in planting substrate, with subsequent nursery production plants, has promoted industrialization embryogenesis. However, plant conversion rates are still low and require improvements to enhance cost-effectiveness commercial micropropagation. With aim improving regeneration from SE, we studied morphological histological criteria water characteristics during germination zygotic (ZE) SE. At cotyledonary stage, SE...
The understorey origin of coffee trees and the strong plasticity Coffea arabica leaves in relation to contrasting light environments have been largely shown. adaptability changes was tested under controlled conditions by increasing illumination rate on C. var. Naryelis seedlings acclimated low observing leaf responses at three different developmental stages (juvenile, growing mature). Only mature proved capable adapting new conditions. In these leaves, major mechanisms were found contribute...
The coffee species Coffea canephora is commercially identified as "Conilon" when produced in Brazil, or "Robusta" elsewhere the world. It represents approximately 40 % of production worldwide. While genetic diversity wild C. has been well studied past, only few studies have addressed currently cultivated varieties around globe. Vietnam largest Robusta producer world, while Mexico Latin American country, besides that a significant production. Knowledge origin countries important and therefore...