Reversible Redox-Dependent Inactivation of Photosystem II as Photosynthesis Regulation in Chlorella

Reversible Redox-Dependent Inactivation of Photosystem II as Photosynthesis Regulation in Chlorella Inactivation of photosystem II (PSII) in the alga Chlorella pyrenoidosa Chick induced by photoinhibition (high light illumination at an intensity 10 times higher than photosynthesis-saturating light) or by incubation at a supraoptimum temperature (41°C) in darkness, resulted in a decrease in the relative yield of variable fluorescence due to a selective suppression of the slow phase of its rise. This indicates that low-activity PSII complexes, with a low efficiency of QA – formation are inactivated first. We suppose that the transition of normal PSII complexes to a low-activity state precedes the complete loss of their photochemical activity. The existence of some common stages of PSII inactivation, when induced by photoinhibition or incubation at supraoptimum temperature in darkness, is discussed. We suggest a scheme of the sequential stages in the regulation of photosynthetic light reactions involving a reversible redox-dependent PSII inactivation. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Reversible Redox-Dependent Inactivation of Photosystem II as Photosynthesis Regulation in Chlorella

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Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2004 by MAIK “Nauka/Interperiodica”
Subject
Life Sciences; Plant Sciences
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1023/B:RUPP.0000047823.11156.eb
Publisher site
See Article on Publisher Site

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