A5027182177- Photosynthetic Processes and Mechanisms
- Photoreceptor and optogenetics research
- Mitochondrial Function and Pathology
- Light effects on plants
- Plant Stress Responses and Tolerance
- Metal-Catalyzed Oxygenation Mechanisms
- Spectroscopy and Quantum Chemical Studies
- Electrocatalysts for Energy Conversion
- Algal biology and biofuel production
- Microbial Fuel Cells and Bioremediation
- Plant and animal studies
- Origins and Evolution of Life
- Antioxidant Activity and Oxidative Stress
- Horticultural and Viticultural Research
- Plant nutrient uptake and metabolism
- Plant tissue culture and regeneration
Institute of Basic Biological Problems
2007-2023
Russian Academy of Sciences
2005-2015
Google (United States)
2007
The photoproduction of superoxide anion radical (O2−•) and hydrogen peroxide (H2O2) in photosystem II (PSII) preparations depending on the damage to water-oxidizing complex (WOC) was investigated. light-induced formation O2−• H2O2 PSII rose with increased destruction WOC. both holding intact WOC samples approximately two times higher than H2O2. rise course disassembly correlated increase fraction low-potential (LP) Cyt b559. restoration electron flow Mn-depleted by exogenous donors...
It is found that dark reduction of photooxidized primary electron donor P 870 + in reaction centres from purple anoxygenic bacteria (two non-sulphur Fe-oxidizing Rhodovulum iodosum and robiginosum , Rhodobacter sphaeroides R-26 sulphur alkaliphilic Thiorhodospira sibirica ) accelerated upon the addition Mn 2+ jointly with bicarbonate (30–75 mM). The effect not observed if HCO 3 − have been replaced by Mg 2 respectively. dependence on concentration suggests formation –bicarbonate complexes,...
The redox interaction of exogenous cytochrome c550 (Cyt) with PSII isolated from spinach was studied. Illumination particles in the presence Cyt led to: (1) photooxidation by reaction center (demonstrated at first time), (2) photoreduction via O2-* photoproduced on acceptor side PSII, and (3) reduced electron carriers PSII. A step-by-step removal components water-oxidizing complex accompanied appearance photooxidation, an increase superoxide dismutase (SOD)-dependent (related to formation),...
The effect of osmolytes (trehalose, sucrose, betaine, D-glucose and hydroxyectoine) on the photoassembly functionally active inorganic core water-oxidizing complex (Mn4CaO5 cluster) in Mn-depleted PSII preparations (apo-WOC-PSII) was investigated. It revealed that efficiency Mn4CaO5 cluster considerably (three times) increased presence 1 M disaccharides (trehalose or sucrose) contrast to other osmolytes. found (especially trehalose improved redox interaction exogenous Mn2+ with apo-WOC-PSII,...
This manuscript describes the application of a fixed-length ultrasonic spectrometer to determine kinetics heat- and photo-induced damage biological membranes protein complexes provides examples test measurements. We implemented measurement scheme using digital analysis harmonic signals. To conduct research, was modernized: speed increased; lighting supplied sample cells; possibility changing gas atmosphere mixing given. Using solutions containing natural concentrations deuterium oxide, high...
Four synthetic manganese complexes in which Mn atoms have different coordination environments and valence states were used to reconstitute water-oxidizing complex (WOC) Mn-depleted photosystem 2 preparations. Three Mn-complexes restored a significant rate of electron transfer oxygen evolution except one atom ligated the O-atoms within ligands by covalent linkage. The effect environment Mn-atom on their efficiencies reconstituting transport was analysed.
In the original article, there was a mistake in legend for ** Figure 5 [...]