Photoprotective, excited-state quenching mechanisms in diverse photosynthetic organisms

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 photopr...

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Bibliographic Details
Published in:The Journal of biological chemistry 2018-04, Vol.293 (14), p.5018-5025
Main Authors: Magdaong, Nikki Cecil M., Blankenship, Robert E.
Format: Article
Language:English
Subjects:
antenna
carotenoid
Carotenoids - metabolism
chlorophyll
Chlorophyll - metabolism
Chlorophyta - physiology
Cyanobacteria - physiology
Diatoms - physiology
non-photochemical quenching
Photosynthesis
photosynthetic pigment
Plant Physiological Phenomena
redox regulation
Rhodophyta - physiology
solar (fuels), photosynthesis (natural and artificial), biofuels (including algae and biomass), bio-inspired, charge transport, membrane, synthesis (novel materials), synthesis (self-assembly)
Thematic Minireviews
xanthophyll cycle
Xanthophylls - metabolism
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Summary: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.
ISSN:0021-9258
1083-351X
DOI:10.1074/jbc.TM117.000233