Crossref journal-article
Proceedings of the National Academy of Sciences
Proceedings of the National Academy of Sciences (341)
Abstract

Xanthophyll pigments have critical structural and functional roles in the photosynthetic light-harvesting complexes of algae and vascular plants. Genetic dissection of xanthophyll metabolism in the green alga Chlamydomonas reinhardtii revealed functions for specific xanthophylls in the nonradiative dissipation of excess absorbed light energy, measured as nonphotochemical quenching of chlorophyll fluorescence. Mutants with a defect in either the α- or β-branch of carotenoid biosynthesis exhibited less nonphotochemical quenching but were still able to tolerate high light. In contrast, a double mutant that was defective in the synthesis of lutein, loroxanthin (α-carotene branch), zeaxanthin, and antheraxanthin (β-carotene branch) had almost no nonphotochemical quenching and was extremely sensitive to high light. These results strongly suggest that in addition to the xanthophyll cycle pigments (zeaxanthin and antheraxanthin), α-carotene-derived xanthophylls such as lutein, which are structural components of the subunits of the light-harvesting complexes, contribute to the dissipation of excess absorbed light energy and the protection of plants from photo-oxidative damage.

Bibliography

Niyogi, K. K., Björkman, O., & Grossman, A. R. (1997). The roles of specific xanthophylls in photoprotection. Proceedings of the National Academy of Sciences, 94(25), 14162–14167.

Authors 3
  1. Krishna K. Niyogi (first)
  2. Olle Björkman (additional)
  3. Arthur R. Grossman (additional)
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Dates
Type When
Created 23 years, 1 month ago (July 26, 2002, 10:42 a.m.)
Deposited 3 years, 4 months ago (April 13, 2022, 2:49 p.m.)
Indexed 1 day, 3 hours ago (Aug. 29, 2025, 5:53 a.m.)
Issued 27 years, 8 months ago (Dec. 9, 1997)
Published 27 years, 8 months ago (Dec. 9, 1997)
Published Online 27 years, 8 months ago (Dec. 9, 1997)
Published Print 27 years, 8 months ago (Dec. 9, 1997)
Funders 0

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@article{Niyogi_1997, title={The roles of specific xanthophylls in photoprotection}, volume={94}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.94.25.14162}, DOI={10.1073/pnas.94.25.14162}, number={25}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Niyogi, Krishna K. and Björkman, Olle and Grossman, Arthur R.}, year={1997}, month=dec, pages={14162–14167} }