A5006117857- Plant Water Relations and Carbon Dynamics
- Plant responses to water stress
- Sugarcane Cultivation and Processing
- Soil Carbon and Nitrogen Dynamics
- Irrigation Practices and Water Management
- Plant responses to elevated CO2
- Horticultural and Viticultural Research
- Rice Cultivation and Yield Improvement
- Plant Surface Properties and Treatments
- Bioenergy crop production and management
- Plant nutrient uptake and metabolism
- Leaf Properties and Growth Measurement
- Seedling growth and survival studies
- Genetic Mapping and Diversity in Plants and Animals
- Climate change and permafrost
- Tree-ring climate responses
- Greenhouse Technology and Climate Control
- Clay minerals and soil interactions
- Atmospheric and Environmental Gas Dynamics
- Advanced Cellulose Research Studies
- Botany and Plant Ecology Studies
- Environmental and biological studies
- Polar Research and Ecology
- Plant Stress Responses and Tolerance
- Climate change impacts on agriculture
Sugarcane Research Center (Brazil)
2024
Agricultural Research Service
2020-2023
Washington State University
2009-2022
United States Department of Agriculture
2022
University of Miami
2007-2016
NSF National Center for Atmospheric Research
2009
University of Colorado Boulder
2009
Campo Arqueologico de Mertola
2009
Colorado State University
2009
Abstract In a seasonally dry plant community of central Florida, USA, that experiences water limitation in the season and high availability wet season, we first tested whether evergreen woody species shift from shallow to deep season. Second, deciduous restrict uptake soil during cease To address these questions, measured source use two three over 13 months using stable isotopes. As hypothesized previous studies, showed leaflessness plants is an important stem isotopic fractionation....
Summary Diffusion of CO 2 from the leaf intercellular air space to site carboxylation ( g m ) is a potential trait for increasing net rates assimilation A ), photosynthetic efficiency, and crop productivity. Leaf anatomy plays key role in this process; however, there are few investigations into how cell wall properties impact . Online carbon isotope discrimination was used determine Oryza sativa wild‐type WT plants mutants with disruptions mixed‐linkage glucan MLG production CslF6 knockouts)...
Plant growth and water use are interrelated processes influenced by genetically controlled morphological biochemical characteristics. Improving plant efficiency (WUE) to sustain in different environments is an important breeding objective that can improve crop yields enhance agricultural sustainability. However, genetic improvement of WUE using traditional methods has proven difficult due the low throughput environmental heterogeneity field settings. To overcome these limitations, this study...
This study is a coordinated effort by the U.S. Geological Survey (USGS), Department of Agriculture, Agricultural Research Service (USDA ARS), and Arizona State University, with assistance from Army Corps Engineers, University Wyoming, Arizona. The specific objectives were: to determine water needs riparian vegetation through growing season throughout SPRNCA ensure its long-term ecological integrity; quantify total use within SPRNCA; source used key plant species SPRNCA. To meet these...
Genetic selection for whole-plant water use efficiency (yield per transpiration; WUEplant ) in any crop-breeding programme requires high-throughput phenotyping of component traits such as intrinsic (WUEi ; CO2 assimilation rate stomatal conductance). Measuring WUEi by gas exchange measurements is laborious and time consuming may not reflect an integrated over the life leaf. Alternatively, leaf carbon stable isotope composition (δ13 Cleaf has been suggested a potential time-integrated proxy...
Leaf carbon and oxygen isotope ratios can potentially provide a time-integrated proxy for stomatal conductance (gs) transpiration rate (E), be used to estimate efficiency (TE). In this study, we found significant relationships of bulk leaf isotopic signature (δ13CBL) enrichment above source water (Δ18OBL) with gas exchange TE in the model C4 grasses Setaria viridis S. italica. δ13C had strong E, gs, use, biomass, TE. Additionally, consistent difference δ13CBL between well-watered...
Variety development of sugarcane (
A significant fraction of Earth consists mountainous terrain. However, the question how to monitor surface–atmosphere carbon exchange over complex terrain has not been fully explored. This article reports on studies by a team investigators from U.S. universities and research institutes who carried out multiscale multidisciplinary field modeling investigation CO2 between ecosystems atmosphere transport in Rocky Mountain region Colorado. The goals campaign, which included ground airborne situ...
Previous mangrove tree ring studies attempted, unsuccessfully, to relate the δ(18) O of trunk cellulose (δ(18) O(CELL) ) source water O(SW) ). Here, we tested whether biochemical fractionation associated with one oxygen in glucose moiety or variation leaf isotope (Δ(LW) can interfere signal as it is recorded (saltwater) and hammock (freshwater) plants. We selected two transects experiencing a salinity gradient, located Florida Keys, USA. The throughout both did not show pattern expected...
Abstract Sugarcane ( Saccharum spp.) represents the most valuable row crop in Louisiana. High levels of biomass production and extensive tillage have degraded portions state's alluvial soils used to grow sugarcane. In addition sucrose, processing generates excess bagasse each year, which can represent a disposal problem for sugar factories. However, converting biochar at nearby pyrolysis facilities may prove be an economical means improving soils. The objective was determine impacts low...
The cold season in the Arctic extends over 8 to 9 mo, yet little is known about vascular plant physiology during this period. Evergreen species photosynthesize under snow, implying that they are exchanging water with atmosphere. However, liquid available for uptake may be limited at time. study objective was determine whether evergreen plants actively taking up while snow and/or immediately following snowmelt spring thaw.In two situ experiments, one plot level and another individual level,...
Abstract Measurements of oxygen isotope enrichment leaf water above source (Δ 18 O LW ) can improve our understanding the interaction between anatomy and physiology on transport. Models have been developed to predict Δ such as string‐of‐lakes model, which describes mixing pools, Péclet effect incorporates transpiration rate length unenriched xylem enriched mesophyll in ( L m or veins v ). Here we compare measurements models two cell wall composition mutants grown under light intensities...
ABSTRACT Plant growth and water use are interrelated processes influenced by the genetic control of both plant morphological biochemical characteristics. Improving efficiency (WUE) to sustain in different environments is an important breeding objective that can improve crop yields enhance agricultural sustainability. However, improvements WUE using traditional methods have proven difficult due low throughput environmental heterogeneity encountered field settings. To overcome these...
ABSTRACT C 4 grasses often outperform 3 species under hot, arid conditions due to superior water and nitrogen use efficiencies lower rates of photorespiration. A method concentrating CO 2 around the site carbon fixation in bundle sheath (BS) is required realize these gains. In NADP-malic enzyme (NADP-ME)-type such as maize, suberin deposition BS cell wall hypothesized act a diffusion barrier escape O entry from surrounding mesophyll cells. Suberin heteropolyester comprised acyl-lipid-derived...
Optimizing row spacing can potentially improve yields when resources such as light and water are limited. Sugarcane in Louisiana is principally grown on rows spaced 1.8 m apart, but interest planting 2.4 increasing. In this study, we hypothesized that wider would have greater availability. Soil moisture sensors were placed at 15, 30, 45 cm depths treatments: spacings, two varieties (L 01-299 HoCP 04-838), dates. was monitored 15-min intervals from 2017 to 2020. Mean volumetric content...
Abstract Water is the most important resource in plant growth and a major limiting factor sugarcane productivity worldwide. Improving water use efficiency (WUE) can increase relative to available resources by increasing photosynthetic capacity transpiration stomatal conductance instead of decreasing conductance. Leaf carbon stable isotopic composition (δ 13 C leaf ) serve as proxy for intrinsic WUE (WUE i because δ are theoretically related through link between intracellular ambient CO 2...
Abstract Increasing whole plant water use efficiency (yield per transpiration; WUE ) through breeding can benefit the sustainability of agriculture and improve crop yield under drought. To select for , an efficient phenotyping method that reports on genetic contribution component traits such as transpiration (TE i ; rate CO 2 assimilation stomatal conductance) must be developed. Leaf carbon stable isotope composition (δ 13 C leaf has been proposed a high-throughput proxy TE negative...