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@ARTICLE{Matsubara:41136,
author = {Matsubara, S. and Chow, W. S.},
title = {{P}opulations of photoinactivated photosystem {II} reaction
ceners characterized by chlorophyll a fluorescence lifetime
in vivo},
journal = {Proceedings of the National Academy of Sciences of the
United States of America},
volume = {101},
issn = {0027-8424},
address = {Washington, DC},
publisher = {Academy},
reportid = {PreJuSER-41136},
pages = {18234 - 18239},
year = {2004},
note = {Record converted from VDB: 12.11.2012},
abstract = {Photosystem (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.},
keywords = {Anti-Bacterial Agents: pharmacology / Capsicum: metabolism
/ Chlorophyll: chemistry / Dithiothreitol: pharmacology /
Light / Light-Harvesting Protein Complexes: chemistry /
Lincomycin: pharmacology / Microscopy, Fluorescence: methods
/ Models, Biological / Nigericin: pharmacology / Oxygen:
metabolism / Photons / Photosynthesis / Photosynthetic
Reaction Center Complex Proteins: chemistry / Photosystem II
Protein Complex: chemistry / Protons / Temperature / Time
Factors / Xanthophylls: metabolism / Anti-Bacterial Agents
(NLM Chemicals) / Light-Harvesting Protein Complexes (NLM
Chemicals) / Photosynthetic Reaction Center Complex Proteins
(NLM Chemicals) / Photosystem II Protein Complex (NLM
Chemicals) / Protons (NLM Chemicals) / Xanthophylls (NLM
Chemicals) / Chlorophyll (NLM Chemicals) / Lincomycin (NLM
Chemicals) / Nigericin (NLM Chemicals) / Dithiothreitol (NLM
Chemicals) / chlorophyll a (NLM Chemicals) / Oxygen (NLM
Chemicals) / J (WoSType)},
cin = {ICG-III},
ddc = {000},
cid = {I:(DE-Juel1)VDB49},
pnm = {Chemie und Dynamik der Geo-Biosphäre},
pid = {G:(DE-Juel1)FUEK257},
shelfmark = {Multidisciplinary Sciences},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:15601775},
pmc = {pmc:PMC539729},
UT = {WOS:000226102700063},
doi = {10.1073/pnas.0403857102},
url = {https://juser.fz-juelich.de/record/41136},
}