Xanthophyll-cycle dependence of the energy transfer between carotenoid dark 
states and chlorophylls in NPQ mutants of living plants and in LHC II

Bode, Stefan; Quentmeier, Claudia C.; Liao, Pen-Nan; Barros, Tiago; Walla, Peter J.

doi:10.1016/j.cplett.2007.11.035

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Xanthophyll-cycle dependence of the energy transfer between carotenoid dark states and chlorophylls in NPQ mutants of living plants and in LHC II

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Barros, Tiago
Department of Structural Biology, Max Planck Institute of Biophysics, Max Planck Society;

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Citation

Bode, S., Quentmeier, C. C., Liao, P.-N., Barros, T., & Walla, P. J. (2008). Xanthophyll-cycle dependence of the energy transfer between carotenoid dark states and chlorophylls in NPQ mutants of living plants and in LHC II. Chemical Physics Letters, 450(4-6), 379-385. doi:10.1016/j.cplett.2007.11.035.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0024-D7F3-5

Abstract

The Car S1→Chl energy transfer efficiency, ΦTransfer, in xanthophyll-cycle mutants of living plants and LHC II was investigated by selective Car S1 two-photon excitation. Before high-light illumination ΦTransfer, of the violaxanthin deficient mutant npq2 is ∼30% smaller than the corresponding value for wild type plants. For the zeaxanthin deficient mutant, npq1, ΦTransfer is ∼30% larger. Wild type Arabidopsis thaliana is the only variant which is capable of a light-dependent decrease of up to 40% and complete recovery to the original ΦTransfer values. In contrast, ΦTransfer remains constant during dark adaptation in both mutants. Surprisingly, changes in ΦTransfer of LHC II preparations were less than 5% only, when substituting violaxanthin by zeaxanthin.