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Photochemical and photoelectrochemical quenching of chlorophyll fluorescence in photosystem II
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SYSNO ASEP 0335115 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Photochemical and photoelectrochemical quenching of chlorophyll fluorescence in photosystem II Title Fotochemické a fotoelektrochemické zhášení fluorescence chlorofylu ve Fotosystému II Author(s) Vredenberg, W. (NL)
Durchan, M. (CZ)
Prášil, Ondřej (MBU-M) RID, ORCIDSource Title Biochimica Et Biophysica Acta-Bioenergetics. - : Elsevier - ISSN 0005-2728
Roč. 1787, č. 12 (2009), s. 1468-1478Number of pages 11 s. Language eng - English Country NL - Netherlands Keywords Chlorophyll a fluorescence ; Photosystem II ; Heterogeneity Subject RIV EE - Microbiology, Virology R&D Projects GA206/08/1683 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z50200510 - MBU-M (2005-2011) UT WOS 000270100400006 DOI 10.1016/j.bbabio.2009.06.008 Annotation This paper deals with kinetics and properties of variable fluorescence in leaves and thylakoids upon excitation with low intensity multi-turnover actinic light pulses corresponding with an excitation rate of about 10 Hz. These show a relatively small and amply documented rise in the sub-s time range towards the plateau level Fpl followed by a delayed and S-shaped rise towards a steady state level Fm which is between three and four fold the initial dark fluorescence level Fo. Properties of this retarded slow rise are i) rate of dark recovery is (1–6 s)−1, ii) suppression by low concentration of protonophores, iii) responsiveness to complementary single turnover flash excitation with transient amplitude towards a level Fm which is between five and six fold the initial dark fluorescence level Fo and iv) in harmony with and quantitatively interpretable in terms of a release of photoelectrochemical quenching controlled by the trans-thylakoid proton pump powered by the light-driven Q cycle Workplace Institute of Microbiology Contact Eliška Spurná, eliska.spurna@biomed.cas.cz, Tel.: 241 062 231 Year of Publishing 2010
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