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The redox state of the plastoquinone pool directly modulates minimum chlorophyll fluorescence yield in Chlamydomonas reinhardtii
Author(s) -
Hohmann-Marriott Martin F.,
Takizawa Kenji,
Eaton-Rye Julian J.,
Mets Laurens,
Minagawa Jun
Publication year - 2010
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/j.febslet.2010.01.052
Subject(s) - chlamydomonas reinhardtii , plastoquinone , chlorophyll fluorescence , chlorophyll , fluorescence , photosystem ii , chemistry , photosystem , chlamydomonas , photochemistry , electrochemical gradient , light harvesting complexes of green plants , biophysics , photosynthesis , biology , botany , thylakoid , chloroplast , mutant , biochemistry , membrane , physics , quantum mechanics , gene
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.