Affiliation:
1. Institute of Basic Biological Problems, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences
Abstract
The review analyzes the data available in the literature on the rates, characteristics and mechanisms of oxygen reduction to a superoxide anion radical at the sites of the photosynthetic electron transport chain where this reduction can occur. The existing assumptions about the role of the components of these sites in this process are critically examined, with use of thermodynamic approaches and the results of recent studies. The process of O2 reduction at the acceptor side of PSI, which is considered the main place of this process in the photosynthetic chain, is described in detail. The evolution of the photosynthetic apparatus in the context of controlling the leakage of electrons to O2 is considered. The reasons limiting the application of the results obtained with isolated segments of the photosynthetic chain to estimate the rates of O2 reduction at the corresponding sites in the intact thylakoid membrane are discussed.
Publisher
The Russian Academy of Sciences
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