Photosynthesis Research
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Book review: “Photoprotection, photoinhibition, gene regulation, and environment” edited by Barbara Demmig-Adams, William W. Adams III and Autar K. Mattoo (Vol 21 in the Series “Advances in photosynthesis and respiration” by Govindjee). Springer, The Netherlands. ISBN: 1-4020-3564-0; hardcopy; US$ 227 or 170 Euros. Members of ISPR receive 25% discount
Photosynthesis Research - Tập 91 - Trang 91-93 - 2006
Circular dichroism of green bacterial chlorosomes
Photosynthesis Research - Tập 24 - Trang 253-263 - 1990
Positive and negative bands in previously measured circular dichroism (CD) spectra of Chlorobium limicola chlorosomes appeared to be sign-reversed relative to those of Chloroflexus aurantiacus chlorosomes in the 740–750 nm spectral region where bacteriochlorophyll (BChl) c absorbs maximally. It was not clear, however, whether this difference was intrinsic to the chlorosomes or was due to differenc...... hiện toàn bộ
Cyclic electron flow around photosystem II in silico: How it works and functions in vivo
Photosynthesis Research - Tập 156 - Trang 129-145 - 2023
To date, cyclic electron flow around PSI (PSI-CEF) has been considered the primary (if not the only) mechanism accepted to adjust the ratio of linear vs cyclic electron flow that is essential to adjust the ratio of ATP/NADPH production needed for CO2 carboxylation. Here we provide a kinetic model showing that cyclic electron flow within PSII (PSII-CEF) is essential to account for the accelerating ...... hiện toàn bộ
Photosystem II core quenching in desiccated Leptolyngbya ohadii
Photosynthesis Research - Tập 143 - Trang 13-18 - 2019
Cyanobacteria living in the harsh environment of the desert have to protect themselves against high light intensity and prevent photodamage. These cyanobacteria are in a desiccated state during the largest part of the day when both temperature and light intensity are high. In the desiccated state, their photosynthetic activity is stopped, whereas upon rehydration the ability to perform photosynthe...... hiện toàn bộ
Electron transfer through photosystem II acceptors: Interaction with anions
Photosynthesis Research - Tập 10 - Trang 365-379 - 1986
We present an overview of anionic interactions with the oxidation-reduction reactions of photosystem II (PSII) acceptors. In section 1, a framework is laid for the electron acceptor side of PSII: the overview begins with a current scheme of the electron transport pathway and of the localization of components in the thylakoid membrane, which is followed by a brief description of the electron accept...... hiện toàn bộ
In vitro enzymatic assays of photosynthetic bacterial 3-vinyl hydratases for bacteriochlorophyll biosyntheses
Photosynthesis Research - Tập 135 - Trang 319-328 - 2017
A chlorosome is a large and efficient light-harvesting antenna system found in some photosynthetic bacteria. This system comprises self-aggregates of bacteriochlorophyll (BChl) c, d, or e possessing a chiral 1-hydroxyethyl group at the 3-position, which plays a key role in the formation of the supramolecule. Biosynthesis of chlorosomal pigments involves stereoselective conversion of 3-vinyl group ...... hiện toàn bộ
The PsbZ subunit of Photosystem II in Synechocystis sp. PCC 6803 modulates electron flow through the photosynthetic electron transfer chain
Photosynthesis Research - Tập 93 - Trang 139-147 - 2007
The psbZ gene of Synechocystis sp. PCC 6803 encodes the ∼6.6 kDa photosystem II (PSII) subunit. We here report biophysical, biochemical and in vivo characterization of Synechocystis sp. PCC 6803 mutants lacking psbZ. We show that these mutants are able to perform wild-type levels of light-harvesting, energy transfer, PSII oxygen evolution, state transitions and non-photochemical quenching (NPQ) un...... hiện toàn bộ
Effects of photosynthetic photon flux density, frequency, duty ratio, and their interactions on net photosynthetic rate of cos lettuce leaves under pulsed light: explanation based on photosynthetic-intermediate pool dynamics
Photosynthesis Research - - 2018
A sensitive, simultaneous analysis of ribulose 1,5-bisphosphate carboxylase/oxygenase efficiencies: Graphical determination of the CO2/O2 specificity factor
Photosynthesis Research - Tập 43 - Trang 57-66 - 1995
A simple approach to determine CO2/O2 specificity factor (τ) of ribulose 1,5-bisphosphate carboxylase/oxygenase is described. The assay measures the amount of CO2 fixation at varying [CO2]/[O2] ratios after complete consumption of ribulose 1,5-bisphosphate (RuBP). Carbon dioxide fixation catalyzed by the carboxylase was monitored by directly measuring the moles of 14CO2 incorporated into 3-phospho...... hiện toàn bộ
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