A5053950962- Plant Water Relations and Carbon Dynamics
- Plant responses to water stress
- Coffee research and impacts
- Seed Germination and Physiology
- Plant responses to elevated CO2
- Growth and nutrition in plants
- Horticultural and Viticultural Research
- Plant Stress Responses and Tolerance
- Irrigation Practices and Water Management
- Plant tissue culture and regeneration
- Plant nutrient uptake and metabolism
- Forest ecology and management
- Cassava research and cyanide
- Sesame and Sesamin Research
- Plant Micronutrient Interactions and Effects
- Tree-ring climate responses
- Antioxidant Activity and Oxidative Stress
- Photosynthetic Processes and Mechanisms
- Soybean genetics and cultivation
- Plant biochemistry and biosynthesis
- Greenhouse Technology and Climate Control
- Agricultural and Food Sciences
- Light effects on plants
- Soil Management and Crop Yield
- Cocoa and Sweet Potato Agronomy
Universidade Federal de Viçosa
2016-2025
North Carolina State University
2023-2025
Universidade Federal de Minas Gerais
2013
Abstract Woody plants minimize xylem embolism formation during drought essentially by closing stomata at higher water potentials and/or increasing the resistance to embolism. Both of these mechanisms result in a stomatal safety margin (SSM), which is potential difference between closure and formation. Here, we investigated whether SSM represents mechanism for herbaceous how different water‐use strategies impact their survival. For that, exposed four crops with contrasting severe deficit...
Drought resistance is essential for plant production under water-limiting environments. Abscisic acid (ABA) plays a critical role in stomata but its impact on hydraulic function beyond the far less studied. We selected genotypes differing their ability to accumulate ABA investigate drought-induced dysfunction. All exhibited similar leaf and stem embolism regardless of differences levels. Their was also similar. Differences were only observed between two extreme genotypes: sitiens (sit;...
Auxins are known to regulate xylem development in plants, but their effects on water transport efficiency poorly known. Here we used tomato plants with the diageotropica mutation (dgt), which has impaired function of a cyclophilin 1 cis-trans isomerase involved auxin signaling, and corresponding wild type (WT) explore mutation's plant hydraulics leaf gas exchange. The dgt mutant showed reduced hydraulically weighted vessel diameter (Dh) (24-43%) conduit number (25-58%) petioles stems,...
Abstract The stems of some herbaceous species can undergo basal secondary growth, leading to a continuum in the degree woodiness along stem. Whether formation growth stem base results differences embolism resistance between and upper portions is unknown. We assessed leaves simultaneously within same individuals two divergent that mature bases. were Solanum lycopersicum (tomato) Senecio minimus (fireweed). Basal plants both displayed advanced greater than This also resulted significant...
Abstract Soil waterlogging and drought correspond to contrasting water extremes resulting in plant dehydration. Dehydration response occurs due impairments root transport, but no previous study has addressed whether limitations transport occur beyond this organ or dehydration alone can explain shoot impairments. Using common bean (Phaseolus vulgaris) as a model species, we report that also impairs leaves stems. During the very first hours of waterlogging, transiently dehydrated potentials...
Coffee (Coffea arabica L.) plants have been assorted as highly suitable to growth at elevated [CO2] (eCa), although such suitability is hypothesized decrease under severe shade. We herein examined how the combination of eCa and contrasting irradiance affects photosynthetic performance. were grown in open-top chambers relatively high light (HL) or low (LL) (9 1 mol photons m-2 day-1, respectively), aCa (437 705 μmol mol-1, respectively). Most traits affected by CO2, their interaction....
Abstract Auxins are master regulators of plant development and auxin perception mutants display smaller leaves, lower transpiration, narrower xylem vessels than their corresponding wild types. Here, we evaluated whether the leaf embolism resistance overall to drought altered in mutant diageotropica ( dgt ). Our assessments demonstrate that tomato exhibit considerably stems (‐24%), petioles (‐43%), midribs (‐34%) type. Alongside vessels, exhibited greater cell wall thickness‐to‐conduit...
The morphoanatomical characteristics of leaves were associated with altitude, hillside, and the cup quality coffee produced in Matas de Minas region. Although small magnitude, there are correlations between altitude morpho-anatomical traits. Despite facing differences management inherent to 363 sampling sites, Northwestern hillside had significant lower quality, whereas only stomata density (SD) thickness leaf epidermis adaxial face (AdET) showed hillsides. Altitude, mass per area (LMA) SD,...
Dieback is a physiological disorder that has caused losses on eucalyptus plantations. Thinking water stress one of the triggers for and aiming at early identification tolerant genotypes, we evaluated plantlets four commercial clones with divergent behavior in field conditions. The were grown greenhouse where drought conditions provided by application polyethylene glycol 6000 solutions 100 300 g L−1. After deficit treatments, morphological, physiological, nutritional metabolic analyses...
Ongoing changes in climate, and the consequent mortality of natural cultivated forests across globe, highlight urgent need to understand plant traits associated with greater tolerance drought. Here, we aimed at assessing key foliar traits, a focus on hydraulic component, that could confer differential ability tolerate drought three commercial hybrids most important Eucalyptus species utilized tropical silviculture: E. urophyla, grandis camaldulensis. All genotypes exhibited similar water...
Calcium (Ca) is one of the main problems in tomato management, due to its susceptibility physiological disorders such as blosson end rot. This study aimed evaluate effects Ca doses on anatomy, biometry and nutritional status cherry hybrid BRS Iracema cultivated a hydroponic system. The experiment consisted an arrangement time split-plot scheme, assigning concentrations (0.5; 1.5; 3.0; 6.0 10.0 mmol L−1) plots days after sowing (57; 84; 97 115) subplots. design was completely randomized, with...
The endosperm of coffee beans is an important structure which composed different reserve compounds. In the present work, we followed anatomical features during mobilization Coffea arabica L. ‘Catuaí’ seed samples, harvested at 20 sites, after 0, 3, 6, 12, 24, 33 and 45 days imbibition. Seed samples were properly fixed stored, respectively, for histochemical enzyme activity approach. Fixed cross-sectioned detection starch, lipids, essential oils, oleoresins, proteins, phenolic compounds,...
Abstract: The objective in this work was to investigate the effect of nitric oxide (NO) like protective agent sesame seeds submitted different osmotic potentials. treatments, total eight, were water (control), plus sodium nitroprusside (SNP) and other treatments with PEG 6000 SNP: - 0.1 MPa, -0.1MPa +200 µM SNP, 0.2 -0.2 MPa -0.3 SNP. Were done following determinations: germination, first count speed germination index, hypocotyl length, radicle dry mass radicle. It quantified activity...
Abstract Irrigation of grasses dominates domestic water use across the globe, and better understanding drought resistance in is undeniable importance for conservation. Breeding programs have released cultivars with improved resistance, but underlying mechanisms remain unknown. We sought to characterize driving four zoysiagrass (Lobo, Zeon, Empire, Meyer) reported exhibit contrasting levels resistance. A dry‐down was performed through deficit irrigation until 70% decline evapotranspiration....