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@ARTICLE{Sun:52985,
author = {Sun, Z.-L. and Lee, H.-Y. and Matsubara, S. and Hope, A. B.
and Pogson, B. J. and Hong, Y.-N. and Chow, W. S.},
title = {{P}hotoprotection of residual functional photosystem {II}
units that survive illumination in the absence of repair,
and their critical role in subsequent recovery},
journal = {Physiologia plantarum},
volume = {128},
issn = {0031-9317},
address = {Oxford [u.a.]},
publisher = {Wiley-Blackwell},
reportid = {PreJuSER-52985},
pages = {415 - 425},
year = {2006},
note = {Record converted from VDB: 12.11.2012},
abstract = {Photosystem II (PSII) complexes, which split water into
oxygen, protons and electrons in photosynthesis, require
light but are also inactivated by it. Recovery of PSII from
photoinactivation requires de novo protein synthesis. PSII
in capsicum leaf segments were photoinactivated in the
absence of chloroplast-encoded protein synthesis. At large
photon exposures and despite the absence of repair, a
residual fraction of PSII remained functional, being ca
0.08–0.2 depending on the ease of gas exchange in the
tissue. This study revealed that the residual functional
PSII was photoprotected by both (1) reaction-center
quenching of excitation energy by photoinactivated PSII even
when little or no PSII activity was permitted, and (2)
antenna quenching, which was dependent on a trans-thylakoid
pH gradient sustained mainly by linear electron transport
and facilitated by the residual functional PSII complexes
themselves. Significantly, little or no contribution to
photoprotection of PSII was observed from cyclic electron
flow around PSI. Further, the small residual functional PSII
population was critical for recovery of the photoinactivated
PSII complexes. Thus, photoinactivated and residual
functional PSII complexes in leaves play a mutually
beneficial role in each other’s ultimate survival.},
cin = {ICG-III},
ddc = {580},
cid = {I:(DE-Juel1)VDB49},
pnm = {Terrestrische Umwelt},
pid = {G:(DE-Juel1)FUEK407},
shelfmark = {Plant Sciences},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000241390000004},
doi = {10.1111/j.1399-3054.2006.00754.x},
url = {https://juser.fz-juelich.de/record/52985},
}