NPQ (non-photochemical quenching) is a fundamental photosynthetic mechanism by which plants protect themselves against excess excitation energy and the resulting photodamage. A discussed molecular mechanism of the so-called feedback de-excitation component (qE) of NPQ involves the formation of a quenching complex. Recently, we have studied the influence of formation of a zeaxanthin–chlorophyll complex on the excited states of the pigments using high-level quantum chemical methodology. In the case of complex formation, electron-transfer quenching of chlorophyll-excited states by carotenoids is a relevant quenching mechanism. Furthermore, additionally occurring charge-transfer excited states can be exploited experimentally to prove the existence of the quenching complex during NPQ.
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August 2005
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Conference Article|
August 01 2005
Role of electron-transfer quenching of chlorophyll fluorescence by carotenoids in non-photochemical quenching of green plants
A. Dreuw;
A. Dreuw
1
*Institute for Physical and Theoretical Chemistry, Johann Wolfgang Goethe-University Frankfurt, Marie Curie-Str. 11, 60439 Frankfurt am Main, Germany
1To whom correspondence should be addressed (email andreas.dreuw@theochem.uni-frankfurt.de).
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G.R. Fleming;
G.R. Fleming
†Department of Chemistry, University of California, Berkeley, CA 94720-1460, U.S.A.
‡Chemical Sciences and Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720-1460, U.S.A.
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M. Head-Gordon
M. Head-Gordon
†Department of Chemistry, University of California, Berkeley, CA 94720-1460, U.S.A.
‡Chemical Sciences and Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720-1460, U.S.A.
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Biochem Soc Trans (2005) 33 (4): 858–862.
Article history
Received:
March 29 2005
Citation
A. Dreuw, G.R. Fleming, M. Head-Gordon; Role of electron-transfer quenching of chlorophyll fluorescence by carotenoids in non-photochemical quenching of green plants. Biochem Soc Trans 1 August 2005; 33 (4): 858–862. doi: https://doi.org/10.1042/BST0330858
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