A5025100999- Coffee research and impacts
- Plant Stress Responses and Tolerance
- Plant responses to elevated CO2
- Plant Water Relations and Carbon Dynamics
- Growth and nutrition in plants
- Aluminum toxicity and tolerance in plants and animals
- Silicon Effects in Agriculture
- Photosynthetic Processes and Mechanisms
- Agricultural and Food Sciences
- Plant nutrient uptake and metabolism
- Geochemistry and Elemental Analysis
- Plant Micronutrient Interactions and Effects
- Horticultural and Viticultural Research
- Plant Parasitism and Resistance
- Plant responses to water stress
- Plant-Microbe Interactions and Immunity
- Leaf Properties and Growth Measurement
- Light effects on plants
- Cassava research and cyanide
- Plant Pathogens and Fungal Diseases
- Plant Molecular Biology Research
- Plant tissue culture and regeneration
- Atmospheric chemistry and aerosols
- Legume Nitrogen Fixing Symbiosis
- Greenhouse Technology and Climate Control
Universidade Federal de Viçosa
2015-2024
Brazilian Agricultural Research Corporation
2015
After oil, coffee is the most valuable traded commodity worldwide. In this review we highlighted some aspects of growth and development in addition to focusing our attention on recent advances (eco)physiology production both Coffea arabica C. canephora, which together account for 99% world bean production. This organized into sections dealing with (i) climatic factors environmental requirements, (ii) root shoot growth, (iii) blossoming synchronisation, fruiting cup quality, (iv) competition...
Summary Silicon (Si) is not considered to be an essential element for higher plants and believed have no effect on primary metabolism in unstressed plants. In rice ( O ryza sativa ), Si nutrition improves grain production; however, attempt has been made elucidate the physiological mechanisms underlying such responses. Here, we assessed crop yield combined advanced gas exchange analysis with carbon isotope labelling metabolic profiling measure effects of photosynthesis, together associated...
Abstract Transgenic tomato (Solanum lycopersicum) plants expressing a fragment of the Sl SDH2-2 gene encoding iron sulfur subunit succinate dehydrogenase protein complex in antisense orientation under control 35S promoter exhibit an enhanced rate photosynthesis. The tricarboxylic acid (TCA) cycle was reduced these transformants, and there were changes levels metabolites associated with TCA cycle. Furthermore, comparison to wild-type plants, carbon dioxide assimilation by up 25% transgenic...
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 coffee plant's physiological performance at elevated atmospheric carbon dioxide concentration [CO2]. We specifically (i) provide new data crop yields obtained under free-air CO2 enrichment conditions, (ii) discuss predictions future based rising temperature and (iii) emphasize role [CO2] key...
• Background and Aims Drought is a major environmental constraint affecting growth production of Coffea canephora. Selection C. canephora clones has been largely empirical as little known about how respond physiologically to drought. Using previously shown differ in drought tolerance, this study aimed identify the extent variation water use mechanisms responsible, particularly those associated morphological traits. Methods Clones (14 120, drought-tolerant; 46 109A, drought-sensitive, based...
Despite extensive studies in eukaryotic aldehyde dehydrogenases, functional information about the ALDH7 antiquitin-like proteins is lacking. A soybean antiquitin homologue gene, designated GmTP55, has been isolated which encodes a dehydrogenase motif-containing 55 kDa protein induced by dehydration and salt stress. GmTP55 closely related to stress-induced plant that belong family. Transgenic tobacco (Nicotiana tabacum) Arabidopsis (Arabidopsis thaliana) plants constitutively expressing have...
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 remain unknown. Therefore, this work aims link physiological biochemical responses photosynthesis elevated air [ CO 2 ] temperature in cultivated genotypes C offea arabica L. (cv. Icatu IPR 108) Coffea canephora cv. Conilon CL 153. Plants were grown for ca. 10 months at 25/20 °C (day/night) 380 or 700 μl l −1 then subjected increase...
Abstract We aimed to evaluate the currently used allometric models, as well propose a reliable and accurate model using non‐destructive measurements of leaf length (L) and/or width (W), for estimating area leaves eight field‐grown coffee cultivars. For construction, total 1563 were randomly selected from different levels tree canopies encompassed full spectrum measurable sizes (0.3–263 cm 2 ) each genotype. Power models better fit (LA) than linear models. To validate model, an independent...
Over the last decades, most information on mechanisms underlying tolerance to drought has been gained by considering this stress as a single event that happens just once in life of plant, contrast what occurs under natural conditions where recurrent episodes are rule. Here we explored coffee (Coffea canephora) plants from broader perspective, integrating key aspects plant physiology and biochemistry. We show exposed multiple events displayed higher photosynthetic rates, which were largely...
Modelling studies have predicted that coffee crop will be endangered by future global warming, but recent reports highlighted high [CO2] can mitigate heat impacts on coffee. This work aimed at identifying protective mechanisms promoted CO2 in Coffea arabica (cv. Icatu and IPR108) C. canephora cv. Conilon CL153. Plants were grown 25/20 ºC (day/night), under 380 or 700 μL L-1, then gradually submitted to 31/25, 37/30 42/34 ºC. Relevant tolerance up for both all genotypes was observed, likely...
It has long been held that the low photosynthetic rates (A) of coffee leaves are largely associated with diffusive constraints to photosynthesis. However, relative limitations stomata and mesophyll overall diffusional photosynthesis, as well coordination leaf hydraulics limitations, remain be fully elucidated in coffee. Whether actual A under ambient CO2 concentrations is kinetic properties Rubisco high (photo)respiration also remains elusive. Here, we provide a holistic analysis understand...
Silicon (Si) plays important roles in alleviating various abiotic stresses. In rice (Oryza sativa), arsenic (As) is believed to share the Si transport pathway for entry into roots, and has been demonstrated decrease As concentrations. However, physiological mechanisms through which might alleviate toxicity plants remain poorly elucidated. We combined detailed gas exchange measurements with chlorophyll fluorescence analysis examine effects of nutrition on photosynthetic performance [a...
Climate changes, mostly related to high temperature, are predicted have major negative impacts on coffee crop yield and bean quality. Recent studies revealed that elevated air [CO2] mitigates the impact of heat leaf physiology. However, extent interaction between quality was never addressed. In this study, single combined enhanced temperature in beans Coffea arabica cv. Icatu were evaluated. Plants grown at 380 or 700 μL CO2 L-1 air, then submitted a gradual rise from 25°C up 40°C during ca....
Climate changes boosted the frequency and severity of drought heat events, with aggravated when these stresses occur simultaneously, turning crucial to unveil plant response mechanisms such harsh conditions. Therefore, responses/resilience single combined exposure severe water deficit (SWD) were assessed in two cultivars main coffee-producing species: Coffea arabica cv. Icatu C. canephora Conilon Clone 153 (CL153). Well-watered plants (WW) exposed SWD under an adequate temperature 25/20°C...