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THERMOLUMINESCENCE EVIDENCE FOR CHLORIDE REQUIREMENT IN THE S 2 →S 3 TRANSITION OF THE WATER‐SPLITTING SYSTEM
Author(s) -
Rozsa Zsuzsa,
Demeter Sandor
Publication year - 1987
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1987.tb05412.x
Subject(s) - thermoluminescence , chloride , recombination , excited state , chemistry , oxygen evolution , photochemistry , photosynthesis , amplitude , analytical chemistry (journal) , luminescence , atomic physics , materials science , optics , optoelectronics , physics , biochemistry , electrode , environmental chemistry , electrochemistry , organic chemistry , gene
— The role of chloride in photosynthetic oxygen evolution was investigated by means of thermoluminescence measurements. It was found that chloride depletion in isolated chloroplasts almost completely abolished the B 1 thermoluminescence band (S 3 Q B − recombination) but diminished only slightly the amplitude of the B 2 band (S 2 Q B − recombination). The B 2 band could be excited to full intensity by the first flash of a flash series and subsequent flashes caused no further change in the amplitude of the band. These observations suggest a block in the S 2 →S 3 transition of the water‐splitting system in chloride‐depleted chloroplasts. Readdition of chloride provided evidence that the inhibitory effect of chloride removal is reversible.