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Light-induced dissociation of antenna complexes in the symbionts of scleractinian corals correlates with sensitivity to coral bleaching
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SYSNO ASEP 0390056 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Light-induced dissociation of antenna complexes in the symbionts of scleractinian corals correlates with sensitivity to coral bleaching Author(s) Hill, R. (AU)
Larkum, A. W. D. (AU)
Prášil, Ondřej (MBU-M) RID, ORCID
Kramer, D. M. (US)
Szabó, M. (AU)
Kumar, V. (AU)
Ralph, P. J. (AU)Source Title Coral Reefs - ISSN 0722-4028
Roč. 31, č. 4 (2012), s. 963-975Number of pages 13 s. Language eng - English Country US - United States Keywords Photoprotection ; Non-photochemical quenching ; Xanthophyll cycle Subject RIV EE - Microbiology, Virology R&D Projects IAA601410907 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) ED2.1.00/03.0110 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support MBU-M - RVO:61388971 UT WOS 000310999300006 DOI 10.1007/s00338-012-0914-z Annotation Elevated temperatures in combination with moderate to high irradiance are known to cause bleaching events in scleractinian corals, characterised by damage to photosystem II (PSII). Photoprotective mechanisms of the symbiont can reduce the excitation pressure impinging upon PSII. In the bleaching sensitive species, Acropora millepora and Pocillopora damicornis, high light alone induced photoprotection through the xanthophyll cycle, increased content of the antioxidant carotenoid, beta-carotene, as well as the dissociation of the light-harvesting chlorophyll complexes. The evidence is compatible with either the membrane-bound chlorophyll a-chlorophyll c (2)-peridinin-protein (acpPC) complex or the peripheral peridinin-chlorophyll-protein complex, or both, disconnecting from PSII under high light. The acpPC complex potentially showed a state transition response with redistribution towards photosystem I to reduce PSII over-excitation. This apparent acpPC dissociation/reassociation was promoted by the addition of the xanthophyll cycle inhibitor, dithiothreitol, under high irradiance Workplace Institute of Microbiology Contact Eliška Spurná, eliska.spurna@biomed.cas.cz, Tel.: 241 062 231 Year of Publishing 2013
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