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Bicarbonate effects on photo‐inhibition
Author(s) -
Cecilia Sundby
Publication year - 1990
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(90)81333-j
Subject(s) - bicarbonate , sodium bicarbonate , thylakoid , anaerobic exercise , chemistry , formate , membrane , endogeny , biochemistry , biophysics , chloroplast , biology , organic chemistry , catalysis , physiology , gene
Isolated thylakoid membranes were found to be efficiently protected against photo‐inhibition by sodium bicarbonate (20 mM NaHCO 3 ) under both anaerobic and aerobic conditions. Furthermore, data are presented which indicate that the pronounced sensitivity to photo‐inhibition under anaerobic compared to aerobic conditions is due to the removal of protecting bicarbonate, rather than oxygen, from the medium. A second type of bicarbonate effect on photo‐inhibition, in apparent contradiction to the protective effect of added NaHCO 3 , is that thylakoid membranes that were depleted in their endogenous bicarbonate by treatment with formate were found to be less susceptible to photo‐inhibition than thylakoids in the normal non‐depleted state.