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Phycobilin/ chlorophyll excitation equilibration upon carotenoid-induced non-photochemical fluorescence quenching in phycobilisomes of the cyanobacterium Synechocystis sp. PCC 6803статья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Rakhimberdieva M.G., Vavilin D.V., Vermaas W.F.J, Elanskaya I.V., Karapetyan N.V.
- Журнал: Biochimica et Biophysica Acta - Bioenergetics
- Том: 1767
- Год издания: 2007
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 757
- Последняя страница: 765
- DOI: 10.1016/j.bbabio.2006.12.007
- Аннотация: To determine the mechanism of carotenoid-sensitized non-photochemical quenching in cyanobacteria, the kinetics of blue-light-induced quenching and fluorescence spectra were studied in the wild type and mutants of Synechocystis sp. PCC 6803 grown with or without iron. The blue-light-induced quenching was observed in the wild type as well as in mutants lacking PS II or IsiA confirming that neither IsiA nor PS II is required for carotenoid-triggered fluorescence quenching. Both fluorescence at 660 nm (originating from phycobilisomes) and at 681 nm (which,upon 440 nm excitation originates mostly from chlorophyll) was quenched. However, no blue-light-induced changes in the fluorescence yield were observed in the apcE− mutant that lacks phycobilisome attachment. The results are interpreted to indicate that interaction of the Slr1963-associated carotenoid with – presumably – allophycocyanin in the phycobilisome core is responsible for non-photochemical energy quenching,and that excitations on chlorophyll in the thylakoid equilibrate sufficiently with excitations on allophycocyanin in wild type to contribute to quenching of chlorophyll fluorescence.
- Добавил в систему: Еланская Ирина Владимировна