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The chlorophyll a fluorescence induction pattern in chloroplasts upon repetitive single turnover excitations: Accumulation and function og QB-nonreducing centers
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SYSNO ASEP 0043198 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title The chlorophyll a fluorescence induction pattern in chloroplasts upon repetitive single turnover excitations: Accumulation and function og QB-nonreducing centers Title Indukce fluorescence chlorofylu a ppři sérii jednoobrátkových excitací: Akumulace a funkce Qb neredukujících center Author(s) Vredenberg, W. (US)
Kasalický, Vojtěch (MBU-M)
Durchan, M. (CZ)
Prášil, Ondřej (MBU-M) RID, ORCIDSource Title Biochimica et biophysica acta - ISSN 0006-3002
Roč. 1757, - (2006), s. 173-181Number of pages 9 s. Language eng - English Country NL - Netherlands Keywords chlorophyll a ; fluorescence quenching ; photosystem 2 Subject RIV EE - Microbiology, Virology R&D Projects 1P05ME824 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA206/05/0335 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z50200510 - MBU-M (2005-2011) AV0Z50510513 - UMBR-M, BC-A (2005-2011) Annotation The increase of chlorophyll fluorescence yield in chloroplasts in a 12.5 Hz train of saturating single turnover flashes and the kinetics of fluorescence yield decay after the last flash have been analyzed. The approximate twofold increase in Fm relative to Fo, reached after 30–40 flashes, is associated with a proportional change in the slow (1–20 s) component of the multiphasic decay. This component reflects the accumulation of a sizeable fraction of QB-nonreducing centers. It is hypothesized that the generation of these centers occurs in association with proton transport across the thylakoid membrane. The data are quantitatively consistent with a model in which the fluorescence quenching of QB-nonreducing centers is reversibly released after second excitation and electron trapping on the acceptor side of Photosystem II Workplace Institute of Microbiology Contact Eliška Spurná, eliska.spurna@biomed.cas.cz, Tel.: 241 062 231 Year of Publishing 2007
Number of the records: 1