A5017197699- Photosynthetic Processes and Mechanisms
- Plant responses to elevated CO2
- Plant Water Relations and Carbon Dynamics
- Plant biochemistry and biosynthesis
- Plant nutrient uptake and metabolism
- Plant Stress Responses and Tolerance
- Atmospheric chemistry and aerosols
- Light effects on plants
- Antioxidant Activity and Oxidative Stress
- Algal biology and biofuel production
- Atmospheric and Environmental Gas Dynamics
- Plant Molecular Biology Research
- Plant and animal studies
- Lipid metabolism and biosynthesis
- Spectroscopy and Quantum Chemical Studies
- Food composition and properties
- Plant responses to water stress
- Cassava research and cyanide
- Microbial Metabolic Engineering and Bioproduction
- Plant Parasitism and Resistance
- Plant Gene Expression Analysis
- Soybean genetics and cultivation
- Photoreceptor and optogenetics research
- Insect-Plant Interactions and Control
- Atmospheric Ozone and Climate
Michigan State University
2016-2025
University of Illinois Urbana-Champaign
2000-2024
Great Lakes Bioenergy Research Center
2019-2023
Office of Science
2019-2021
Plant (United States)
2018
SUNY College of Environmental Science and Forestry
2017
State University of New York
2017
York University
2017
United States Nuclear Regulatory Commission
2016
University of Essex
2015
This research is part of an effort that the ICT (Institute Tropical Cultivation) has been doing for several years tending to develop superior genotypes cocoa (Theobroma cacao L.). That why this study aims find tolerant or moderately and accessions water stress with resistance pests diseases high production industrial quality. Twenty seedlings were investigated, during period 6 months, in a soil sandy-loam texture under nursery conditions, controlled irrigation. A split plot design was used,...
ABSTRACT Photosynthetic responses to carbon dioxide concentration can provide data on a number of important parameters related leaf physiology. Methods for fitting model such are briefly described. The method will fit the following parameters: V cmax , J TPU R d and g m [maximum carboxylation rate allowed by ribulose 1·5‐bisphosphate carboxylase/oxygenase (Rubisco), photosynthetic electron transport (based NADPH requirement), triose phosphate use, day respiration mesophyll conductance,...
The conductance for CO(2) diffusion in the mesophyll of leaves can limit photosynthesis. We have studied two methods determining to leaves. generated an ideal set photosynthesis rates over a range partial pressures stroma and effect altering on measured response intercellular pressure. used data test sensitivity small errors parameters determine conductance. were also several using rather than sets. It is concluded that both be each method has particular strengths. believe will prove useful future.
Conventional gas-exchange techniques that measure the stomatal conductance and rate of CO2 assimilation leaves were combined with measurements carbon isotope composition in air passing over a leaf. Isotopic discrimination during uptake was determined from difference entering leaving leaf chamber. measured short term correlated strongly combusted material. Environmental conditions manipulated to alter relative influences carboxylation on isotopes by intact leaves. With C3 plants, increased as...
The effect of long-term (weeks to months) CO(2) enhancement on (a) the gas-exchange characteristics, (b) content and activation state ribulose-1,5-bisphosphate carboxylase (rubisco), (c) leaf nitrogen, chlorophyll, dry weight per area were studied in five C(3) species (Chenopodium album, Phaseolus vulgaris, Solanum tuberosum, melongena, Brassica oleracea) grown at partial pressures 300 or 900 1000 microbars. Long-term exposure elevated affected response photosynthesis one three ways: initial...
Very large amounts of isoprene are emitted from vegetation, especially mosses, ferns, and trees. This hydrocarbon flux to the atmosphere, roughly equal methane, has a effect on oxidizing potential atmosphere. Isoprene emission results de novo synthesis by deoxyxylulose phosphate/methyl erythritol 4-phosphate pathway in plastids. Dimethylallyl pyrophosphate made this is converted synthase. synthase activity plants high pH optimum requirement for Mg2+ that consistent with its location inside...
ABSTRACT Photosynthesis is particularly sensitive to heat stress and recent results provide important new insights into the mechanisms by which moderate reduces photosynthetic capacity. Perhaps most surprising that there little or no damage photosystem II as a result of even though can reduce rate near zero. Moderate stimulate dark reduction plastoquinone cyclic electron flow in light. In addition, may increase thylakoid leakiness. At same time, rubisco deactivates at moderately high...
Photorespiration is the light‐dependent evolution of CO 2 , which accompanies photosynthesis in C 3 plants. The four best known methods measuring rate photorespiration have theoretical or technical problems, make results unreliable. However, can be calculated from net assimilation and partial pressures O . Estimates rates past future made. as a proportion will fall to one half current when level atmosphere doubles.
ABSTRACT Restrictions to photosynthesis can limit plant growth at high temperature in a variety of ways. In addition increasing photorespiration, moderately temperatures (35–42 °C) cause direct injury the photosynthetic apparatus. Both carbon metabolism and thylakoid reactions have been suggested as primary site these temperatures. present study this issue was addressed by first characterizing leaf dynamics Pima cotton ( Gossypium barbadense ) grown under irrigation US desert south‐west. It...
The resistance to diffusion of CO(2) from the intercellular airspaces within leaf through mesophyll sites carboxylation during photosynthesis was measured using three different techniques. techniques include a method based on discrimination against heavy stable isotope carbon, (13)C, and two modeling methods. methods rely upon assumptions, but estimates conductance were similar with all leaves number species about 1.4 times stomatal for determined in unstressed plants at high light....
Plants resist infection and herbivory with innate immune responses that are often associated reduced growth. Despite the importance of growth-defense tradeoffs in shaping plant productivity natural agricultural ecosystems, molecular mechanisms link growth immunity poorly understood. Here, we demonstrate mediated by hormone jasmonate uncoupled an Arabidopsis mutant (jazQ phyB) lacking a quintet Jasmonate ZIM-domain transcriptional repressors photoreceptor phyB. Analysis epistatic interactions...
Leaf area growth determines the light interception capacity of a crop and is often used as surrogate for plant in high-throughput phenotyping systems. The relationship between leaf terms mass will depend on how carbon partitioned among new area, mass, root reproduction, respiration. A model photosynthetic rate partitioning to different organs was developed tested with Arabidopsis thaliana L. Heynh. ecotype Columbia (Col-0) mutant line, gigantea-2 (gi-2), which develops very large rosettes....
Abstract The year 2024 marks 70 years since the general outline of carbon pathway in photosynthesis was published. Although several alternative pathways are now known, it is remarkable how many organisms use reaction sequence described yrs ago, which known as Calvin–Benson cycle or variants such Calvin–Benson–Bassham Benson–Calvin cycle. However, once has entered and converted to a 3-carbon sugar, potential fates. This review will examine last stages photosynthetic metabolism leaves. In land...