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000041136 0247_ $$2DOI$$a10.1073/pnas.0403857102
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000041136 084__ $$2WoS$$aMultidisciplinary Sciences
000041136 1001_ $$0P:(DE-Juel1)129358$$aMatsubara, S.$$b0$$uFZJ
000041136 245__ $$aPopulations of photoinactivated photosystem II reaction ceners characterized by chlorophyll a fluorescence lifetime in vivo
000041136 260__ $$aWashington, DC$$bAcademy$$c2004
000041136 300__ $$a18234 - 18239
000041136 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
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000041136 440_0 $$05100$$aProceedings of the National Academy of Sciences of the United States of America$$v101$$x0027-8424$$y52
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000041136 520__ $$aPhotosystem (PS) II centers, which split water into oxygen, protons, and electrons during photosynthesis, require light but are paradoxically inactivated by it. Prolonged light exposure concomitantly decreased both the functional fraction of PSII reaction centers and the integral PSII chlorophyll (Chl) a fluorescence lifetime in leaf segments of Capsicum annuum L. Acceleration of photoinactivation of PSII by a pretreatment with the inhibitors/uncoupler lincomycin, DTT, or nigericin further reduced PSII Chl a fluorescence lifetimes. A global analysis of fluorescence lifetime distributions revealed the presence of at least two distinct populations of photoinactivated PSII centers, one at 1.25 ns, and the other at 0.58 ns. Light treatment first increased the 1.25-ns component, a weak quencher, at the expense of a component at 2.22 ns corresponding to functional PSII centers. The 0.58-ns component, a strong quencher, emerged later than the 1.25-ns component. The strongly quenching PSII reaction centers could serve to avoid further damage to themselves and protect their functional neighbors by acting as strong energy sinks.
000041136 536__ $$0G:(DE-Juel1)FUEK257$$2G:(DE-HGF)$$aChemie und Dynamik der Geo-Biosphäre$$cU01$$x0
000041136 588__ $$aDataset connected to Web of Science, Pubmed
000041136 650_2 $$2MeSH$$aAnti-Bacterial Agents: pharmacology
000041136 650_2 $$2MeSH$$aCapsicum: metabolism
000041136 650_2 $$2MeSH$$aChlorophyll: chemistry
000041136 650_2 $$2MeSH$$aDithiothreitol: pharmacology
000041136 650_2 $$2MeSH$$aLight
000041136 650_2 $$2MeSH$$aLight-Harvesting Protein Complexes: chemistry
000041136 650_2 $$2MeSH$$aLincomycin: pharmacology
000041136 650_2 $$2MeSH$$aMicroscopy, Fluorescence: methods
000041136 650_2 $$2MeSH$$aModels, Biological
000041136 650_2 $$2MeSH$$aNigericin: pharmacology
000041136 650_2 $$2MeSH$$aOxygen: metabolism
000041136 650_2 $$2MeSH$$aPhotons
000041136 650_2 $$2MeSH$$aPhotosynthesis
000041136 650_2 $$2MeSH$$aPhotosynthetic Reaction Center Complex Proteins: chemistry
000041136 650_2 $$2MeSH$$aPhotosystem II Protein Complex: chemistry
000041136 650_2 $$2MeSH$$aProtons
000041136 650_2 $$2MeSH$$aTemperature
000041136 650_2 $$2MeSH$$aTime Factors
000041136 650_2 $$2MeSH$$aXanthophylls: metabolism
000041136 650_7 $$00$$2NLM Chemicals$$aAnti-Bacterial Agents
000041136 650_7 $$00$$2NLM Chemicals$$aLight-Harvesting Protein Complexes
000041136 650_7 $$00$$2NLM Chemicals$$aPhotosynthetic Reaction Center Complex Proteins
000041136 650_7 $$00$$2NLM Chemicals$$aPhotosystem II Protein Complex
000041136 650_7 $$00$$2NLM Chemicals$$aProtons
000041136 650_7 $$00$$2NLM Chemicals$$aXanthophylls
000041136 650_7 $$01406-65-1$$2NLM Chemicals$$aChlorophyll
000041136 650_7 $$0154-21-2$$2NLM Chemicals$$aLincomycin
000041136 650_7 $$028380-24-7$$2NLM Chemicals$$aNigericin
000041136 650_7 $$03483-12-3$$2NLM Chemicals$$aDithiothreitol
000041136 650_7 $$0479-61-8$$2NLM Chemicals$$achlorophyll a
000041136 650_7 $$07782-44-7$$2NLM Chemicals$$aOxygen
000041136 650_7 $$2WoSType$$aJ
000041136 65320 $$2Author$$achlorophyll fluorescence lifetime
000041136 65320 $$2Author$$aexcitation quenching
000041136 65320 $$2Author$$aphotoinactivation
000041136 65320 $$2Author$$aphotoprotection
000041136 7001_ $$0P:(DE-HGF)0$$aChow, W. S.$$b1
000041136 773__ $$0PERI:(DE-600)1461794-8$$a10.1073/pnas.0403857102$$gVol. 101, p. 18234 - 18239$$p18234 - 18239$$q101<18234 - 18239$$tProceedings of the National Academy of Sciences of the United States of America$$v101$$x0027-8424$$y2004
000041136 8567_ $$2Pubmed Central$$uhttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC539729
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