A5012946326- Plant Stress Responses and Tolerance
- Plant nutrient uptake and metabolism
- Fern and Epiphyte Biology
- Growth and nutrition in plants
- Plant Diversity and Evolution
- Microbial Metabolites in Food Biotechnology
- Agricultural and Food Sciences
- Plant responses to water stress
- Plant responses to elevated CO2
- Plant Water Relations and Carbon Dynamics
- Aquaculture Nutrition and Growth
- Photosynthetic Processes and Mechanisms
- Polysaccharides and Plant Cell Walls
- Biofuel production and bioconversion
- Ion Transport and Channel Regulation
- Plant Parasitism and Resistance
- Aluminum toxicity and tolerance in plants and animals
- Sugarcane Cultivation and Processing
- Biocrusts and Microbial Ecology
- Plant Molecular Biology Research
- Plant Micronutrient Interactions and Effects
- Pineapple and bromelain studies
- Legume Nitrogen Fixing Symbiosis
- Plant and animal studies
- Seed Germination and Physiology
Instituto Chico Mendes de Conservação da Biodiversidade
2022-2024
Instituto de Pesquisa Ambiental da Amazônia
2024
Instituto de Botânica
2013-2022
Instituto de Pesquisas Ecológicas
2022
Institut des Sciences des Plantes de Paris Saclay
2003
Université Paris Cité
2003
Centre National de la Recherche Scientifique
2003
Université Paris-Sud
2003
Universidade Estadual de Campinas (UNICAMP)
1997
Because of the economical relevance sugarcane and its high potential as a source biofuel, it is important to understand how this crop will respond foreseen increase in atmospheric [CO(2)]. The effects increased [CO(2)] on photosynthesis, development carbohydrate metabolism were studied (Saccharum ssp.). Plants grown at ambient (approximately 370 ppm) elevated 720 during 50 weeks open-top chambers. plants under CO(2) showed, end such period, an about 30% photosynthesis 17% height, accumulated...
Feruloylation of arabinoxylan (AX) in grass cell walls is a key determinant recalcitrance to enzyme attack, making it target for improvement crops, and interest evolution. Definitive evidence on the genes responsible lacking so we studied candidate gene that identified within BAHD acyl-CoA transferase family. We used RNA interference (RNAi) silencing orthologs model grasses Setaria viridis (SvBAHD01) Brachypodium distachyon (BdBAHD01) determined effects AX feruloylation. Silencing SvBAHD01...
In maize (Zea mays) roots, xylem water transfer supported by root pressure occurs during the day and is less important at night. Diurnal modifications of osmotic gradient between medium could not explain oscillation flux in young roots day–night cycle. We observed a high turgor cortical cells associated with flux. ZmPIP transcripts oscillate cycle exhibiting some characteristics genes regulated circadian mechanism. The PIP protein level profile different from mRNA pattern. Moreover, ZmPIP1...
Neste trabalho é feita uma comparação entre os métodos mais comumente utilizados para a dosagem de amido em materiais vegetais. A um método químico (McCready) e o enzimático proposto neste mostra que, embora primeiro seja apropriado maioria dos vegetais, nos casos que polissacarídeos parede celular (pectinas hemiceluloses) estão presentes, resultados podem ser bastante alterados. Entretanto, ao usar apresentado, foi possível obter estimativas acuradas conteúdos diversos tecidos O opção...
Expansins refer to a family of closely related non-enzymatic proteins found in the plant cell wall that are involved loosening. In addition, expansins appear be different physiological and environmental responses plants such as leaf stem initiation growth, stomata opening closing, reproduction, ripening stress tolerance. Sugarcane (Saccharum spp.) is one main crops grown worldwide. Lignocellulosic biomass from sugarcane most promising raw materials for ethanol industry. However, efficient...
We have identified two loci linked to aluminum (Al) tolerance in the maize inbred line Cat-100-6 by means of restriction fragment length polymorphism (RFLP) and bulked segregant analysis (BSA). A segregating population F 2 was obtained from a cross between (Al tolerant) × S1587-17 sensitive) parents. Subsequently DNA bulks individuals, displaying contrasting Al trait were generated . From total 158 markers used, 30 showing parents bulks. The segregation results derived hybridization these 56...
Desiccation tolerance in vegetative tissues enables resurrection plants to remain quiescent under severe drought and rapidly recover full metabolism once water becomes available. Barbacenia graminifolia is a plant that occurs at high altitudes, typically growing on rock slits, exposed irradiance limited availability. We analyzed the levels of reactive oxygen species (ROS) antioxidants, carotenoids its cleavage products, stress-related phytohormones fully hydrated, dehydrated, rehydrated...
Nitric oxide (NO) exerts pleiotropic effects on plant development; however, its involvement in cell wall modification during root hair formation (RHF) has not yet been addressed. Here, mutants of Arabidopsis thaliana with altered phenotypes were used to assess the S-nitrosoglutathione (GSNO), primary NO source, dynamics and gene expression roots induced form hairs. GSNO auxin restored phenotype hairless defective 6 (rhd6) mutant. A positive correlation was observed between increased...
Guzmania monostachia (Bromeliaceae) is a tropical epiphyte capable of up-regulating crassulacean acid metabolism (CAM) in its photosynthetic tissues response to changing nutrient and water availability. Previous studies have shown that under drought there gradient increasing CAM expression from the basal (youngest) apical (oldest) portion leaves, additionally nitrogen deficiency can further increase intensity leaf apex this bromeliad. The present study investigated inter-relationships...
ABSTRACT Stress memory is the development of altered responses to stress due previous exposure, which might result in increased tolerance. Biochemical and physiological parameters shown be positively affected by include those antioxidant nitrosative metabolism, photosynthetic pigments osmolyte content. Epiphytic bromeliads likely present since they experience frequent droughts canopies. Thus, we aimed evaluate if epiphytic bromeliad Acanthostachys strobilacea (Schult. & Schult.f.)...
Urea is an important nitrogen source for some bromeliad species, and in nature it derived from the excretion of amphibians, which visit or live inside tank water. Its assimilation dependent on hydrolysis by urease (EC: 3.5.1.5), although this enzyme has been extensively studied to date, little information available about its cellular location. In higher plants, considered be present cytoplasm. However, there evidence that secreted Vriesea gigantea, implying at least temporarily located...
Background and Aims Chrysolaena obovata, an Asteraceae of the Brazilian Cerrado, presents seasonal growth, marked by senescence aerial organs in winter subsequent regrowth at end this season.The underground reserve organs, rhizophores, accumulate inulin-type fructans, which are known to confer tolerance drought low temperature.Fructans fructan-metabolizing enzymes show a characteristic spatial temporal distribution rhizophores during developmental cycle.Previous studies have shown...
Bamboo is one of the most easily available resources found in forests. Due to their long periods vegetative growth and rapid biomass gains, bamboo species could show a significant potential for responding elevated atmospheric CO2 concentrations. The purpose this study was investigate effects an increased concentration on selected physiological biochemical parameters Aulonemia aristulata. After 7 weeks, plants grown under showed increase 77% photosynthesis, 56% tillering, 104% leaf area, 92%...
Seeds of Caesalpinia echinata fill up to physiological maturation phase ~60 days after anthesis (DAA) in the field. These seeds are desiccation tolerant 0.08 gH2O gDW–1 and can be stored for 2 years under freezing temperatures without losing germinability. Starch (40–50%), soluble carbohydrates (10–15%, mainly sucrose cyclitols), addition traces raffinose stachyose detected early at maturation, supposed related acquisition tolerance. In present work we demonstrate that desiccation-intolerant...
Barbacenia graminifolia is a Velloziaceae species endemic to the campos rupestres in Serra do Cipó, Minas Gerais state (Brazil). This biome characterised by high irradiance and limited water conditions. Unlike other resurrection plants, B. can maintain hydric status (>80%) after 28 days of suppression before desiccation. We investigated physiological metabolic mechanisms associated with structural changes that allow hydration under prolonged deficit recover After 30 deficit, desiccated...