A5069311568- Photosynthetic Processes and Mechanisms
- Spectroscopy and Quantum Chemical Studies
- Photoreceptor and optogenetics research
- Algal biology and biofuel production
- Plant Stress Responses and Tolerance
- Light effects on plants
- Mitochondrial Function and Pathology
- Marine and coastal ecosystems
- Antioxidant Activity and Oxidative Stress
- Plant Water Relations and Carbon Dynamics
- Metal-Catalyzed Oxygenation Mechanisms
- Biocrusts and Microbial Ecology
- Electrochemical Analysis and Applications
- Porphyrin and Phthalocyanine Chemistry
- Plant responses to elevated CO2
- ATP Synthase and ATPases Research
- Plant Parasitism and Resistance
- Plant responses to water stress
- Plant and animal studies
- Plant biochemistry and biosynthesis
- Soybean genetics and cultivation
- Water Quality Monitoring and Analysis
- Genetic and Environmental Crop Studies
- Atmospheric and Environmental Gas Dynamics
- Microbial Community Ecology and Physiology
University of Illinois Urbana-Champaign
2016-2025
Jawaharlal Nehru University
2022-2023
National Centre of Scientific Research "Demokritos"
2015
Lund University
2009
Commonwealth Scientific and Industrial Research Organisation
2002
Urbana University
1972-1999
BioEnergetics (United States)
1998
Australian National University
1998
Argonne National Laboratory
1997
Northwestern University
1997
Chlorophyll (Chl) a fluorescence induction (transient), measured by exposing dark-adapted samples to high light, shows polyphasic rise, which has been the subject of extensive research over several decades. Several Chl parameters based on this transient have defined, most widely used being FV [= (FM-F0)]/FM ratio as proxy for maximum quantum yield PSII photochemistry. However, considerable additional information may be derived from analysis shape transient. In fact, performance indices (PIs)...
Monitoring transmission changes at 820 nm, a measure of the redox states plastocyanin (PC) and P700, is good complementary technique for chlorophyll (chl) fluorescence induction measurements. A thorough characterization properties 820-nm kinetics during first second after dark-to-light transition provided here pea (Pisum sativum L.) leaves. The data indicate that in dark-adapted leaf reduced state. Three photosystem I (PSI)-related components, PC, P700 ferredoxin, can contribute to signal....
Summary One of the major factors limiting biomass productivity in algae is low thermodynamic efficiency photosynthesis. The greatest inefficiencies photosynthesis occur during conversion light into chemical energy. At full sunlight light‐harvesting antenna captures photons at a rate nearly 10 times faster than rate‐limiting step photosynthetic electron transport. Excess captured energy dissipated by non‐productive pathways including production reactive oxygen species. Substantial...
Abstract Abiotic stresses such as heat, drought and submergence are major threats to global food security. Despite simultaneous or sequential occurrence of these being recurrent under field conditions, crop response stress combinations is poorly understood. Rice a staple for the majority human beings. Exploitation existing genetic diversity in rice combined and/or useful approach developing climate‐resilient cultivars. We phenotyped ~400 accessions high temperature, drought, their...
The xanthophyll cycle-dependent dissipation of excitation energy in higher plants is one the most important regulatory and photoprotective mechanisms photosynthesis. Using parallel time-resolved pulse-amplitude modulation fluorometry, we studied influence intrathylakoid pH cycle carotenoids on PSII chlorophyll (Chl) a fluorescence yield thylakoids Arabidopsis, spinach, barley. Increases concentrations dithiothreitol thylakoids, which have trans-thylakoid membrane gradient are known to...
Irradiation of etiolated leaves leads to their greening. Although this problem has a long history, the question whether intermittent irradiation (IMI) grown plants have fully functional reaction centres as well oxygen clock, before exposure continuous (CI), had not been resolved. To answer question, analyze development two photosystems, following parallel measurements were made: (1) Emission spectra at 77 K; (2) OJIP chlorophyll (Chl) fluorescence transient; (3) period 4 oscillation in flash...
The Oxygen Evolving Complex in photosystem II, which is responsible for the oxidation of water to oxygen plants, algae and cyanobacteria, contains a cluster one calcium four manganese atoms. This serves as model splitting by energy obtained from sunlight. recent published data on mechanism structure II provide detailed architecture oxygen-evolving complex surrounding amino acids. Biomimetically, we expect learn some strategies this natural system synthesize an efficient catalyst oxidation,...