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@ARTICLE{Matsubara:40448,
author = {Matsubara, S. and Naumann, M. and Martin, J. M. and Nichol,
C. and Rascher, U. and Morosinotto, T. and Bassi, R. and
Osmond, B.},
title = {{S}lowly reversible de-epoxidation of lutein-epoxide in
deep shade leaves of a tropical tree legume may 'lock-in'
lutein-based photoprotection during acclimation to strong
light},
journal = {The journal of experimental botany},
volume = {56},
issn = {0022-0957},
address = {Oxford},
publisher = {Univ. Press},
reportid = {PreJuSER-40448},
pages = {461 - 468},
year = {2005},
note = {Record converted from VDB: 12.11.2012},
abstract = {The kinetics of response to strong light have been examined
in deeply shaded leaves of the tropical tree legume (Inga
sp.) which have extraordinarily high levels of the
alpha-xanthophyll lutein-epoxide that are co-located in
pigment-protein complexes of the photosynthetic apparatus
with the beta-xanthophyll violaxanthin. As in other species,
rapidly reversible photoprotection (measured as
non-photochemical chlorophyll fluorescence quenching) is
initiated within the time frame of sun-flecks (minutes),
before detectable conversion of violaxanthin to
antheraxanthin or zeaxanthin. Photoprotection is stabilized
within hours of exposure to strong light by simultaneously
engaging the reversible violaxanthin cycle and a slowly
reversible conversion of lutein-epoxide to lutein. It is
proposed that this lutein 'locks in' a primary mechanism of
photoprotection during photoacclimation in this species,
converting efficient light-harvesting antennae of the shade
plant into potential excitation dissipating centres. It is
hypothesized that lutein occupies sites L2 and V1 in
light-harvesting chlorophyll protein complexes of
photosystem II, facilitating enhanced photoprotection
through the superior singlet and/or triplet chlorophyll
quenching capacity of lutein.},
keywords = {Acclimatization: physiology / Circadian Rhythm / Electron
Transport / Fabaceae: metabolism / Fabaceae: physiology /
Fabaceae: radiation effects / Light / Lutein: analogs $\&$
derivatives / Lutein: metabolism / Photosynthetic Reaction
Center Complex Proteins: physiology / Pigments, Biological:
metabolism / Plant Leaves: physiology / Trees: physiology /
Tropical Climate / Photosynthetic Reaction Center Complex
Proteins (NLM Chemicals) / Pigments, Biological (NLM
Chemicals) / Lutein (NLM Chemicals) / J (WoSType)},
cin = {ICG-III},
ddc = {580},
cid = {I:(DE-Juel1)VDB49},
pnm = {Chemie und Dynamik der Geo-Biosphäre},
pid = {G:(DE-Juel1)FUEK257},
shelfmark = {Plant Sciences},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:15501906},
UT = {WOS:000226610500015},
doi = {10.1093/jxb/eri012},
url = {https://juser.fz-juelich.de/record/40448},
}