Journal
FEBS LETTERS
Volume 584, Issue 5, Pages 1021-1026Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.febslet.2010.01.052
Keywords
Plastoquinone; Chlorophyll fluorescence; Light harvesting complex
Funding
- JSPS Short-term Postdoctoral Fellowship
- Ministry of Education, Culture, Sports, Science and Technology
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The effect of the plastoquionone (PQ) pool oxidation state on minimum chlorophyll fluorescence was studied in the green alga Chlamydomonas reinhardtii. In wild type and a mutant strain that lacks both photosystems but retains light harvesting complexes, oxygen depletion induced a rise in minimum chlorophyll fluorescence. An increase in minimum fluorescence yield is also observed when the PQ pool becomes reduced in the presence of oxygen and after application of an ionophore that collapses the transmembrane proton gradient. Together these results indicate that minimum chlorophyll fluorescence is modulated by the PQ oxidation state. (C) 2010 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
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