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J Biol Chem. 2018 Apr 6;293(14):5018-5025. doi: 10.1074/jbc.TM117.000233. Epub 2018 Jan 3.

Photoprotective, excited-state quenching mechanisms in diverse photosynthetic organisms.

Author information

1
From the Departments of Biology and Chemistry and.
2
the Photosynthetic Antenna Research Center, Washington University in Saint Louis, St. Louis, Missouri 63130.
3
From the Departments of Biology and Chemistry and blankenship@wustl.edu.

Abstract

Light-harvesting complexes (LHCs) serve a dual role in photosynthesis, depending on the prevailing light conditions. In low light, they ensure photosynthetic efficiency by maximizing the light absorption cross-section and subsequent energy storage. Under excess light conditions, LHCs perform photoprotective quenching functions to prevent harmful chemical species such as triplet chlorophyll and singlet oxygen from forming and damaging the photosynthetic apparatus. In this Minireview, various photoprotective quenching mechanisms that have been identified in different photosynthetic organisms are surveyed and summarized, and implications for improving photosynthetic productivity are briefly discussed.

KEYWORDS:

antenna; carotenoid; chlorophyll; non-photochemical quenching; photosynthesis; photosynthetic pigment; redox regulation; xanthophyll cycle

PMID:
29298897
PMCID:
PMC5892585
DOI:
10.1074/jbc.TM117.000233
[Indexed for MEDLINE]
Free PMC Article

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