EPR study of light-induced regulation of photosynthetic electron transport in Synechocystis sp. strain PCC 6803

FEBS Letters
Boris V TrubitsinA N Tikhonov

Abstract

The kinetics of the light-induced redox changes of the photosystem 1 (PS 1) primary donor P(700) in whole cells of the cyanobacteria Synechocystis sp. PCC 6803 were studied by the electron paramagnetic resonance method. It was shown that the linear photosynthetic electron transport in cyanobacteria was controlled by two main mechanisms: (i) oxygen-dependent acceleration of electron transfer from PS 1 to NADP(+) due to activation of the Calvin cycle reactions and (ii) retardation of electron flow between two photosystems governed by a transmembrane proton gradient. In addition to the linear photosynthetic electron transport, cyanobacteria were capable of maintaining alternative pathways involving cyclic electron transfer around PS 1 and respiratory chains.

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Citations

May 23, 2013·Photosynthesis Research·Alexander N Tikhonov
Nov 11, 2008·Biochemistry. Biokhimii︠a︡·I V KuvykinA N Tikhonov
May 20, 2014·Bio Systems·Alexander N Tikhonov, Alexey V Vershubskii
Jun 27, 2014·Photosynthesis Research·Boris V TrubitsinAlexander N Tikhonov
Apr 30, 2014·Journal of Photochemistry and Photobiology. B, Biology·Masaru Kono, Ichiro Terashima
Nov 22, 2018·Cell Biochemistry and Biophysics·Alexander N Tikhonov, Witold K Subczynski
Nov 22, 2018·Frontiers in Plant Science·Ginga Shimakawa, Chikahiro Miyake

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