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Protective mechanisms in photosynthesis of Anabaena cylindrica
Author(s) -
Laczkó Hona
Publication year - 1985
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1985.tb01906.x
Subject(s) - photosynthesis , electron flow , anabaena , chemistry , electron acceptor , electron transport chain , electron transfer , photochemistry , biophysics , cyanobacteria , biochemistry , biology , bacteria , genetics
The role of O 2 photoreduction was studied in intact cells of normal and photobleached Anabaena cylindrica Lemm. strain PCC 7122. We found that O 2 photoreduction represents a protective mechanism against over‐reduction of the photosyn‐thetic electron transport chain only in normal Anabaena cells. This protective mechanism was not functioning in photobleached cells in spite of the increased rate of photosynthetic electron flow. A new electron acceptor, the induced reversible hydrogenase, is suggested to be operating in photobleached Anabaena cylindrica .
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