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@ARTICLE{Caliandro:128315,
author = {Caliandro, R. and Nagel, Kerstin and Kastenholz, Bernd and
Bassi, R and Li, Z. and Niyogi, K.K. and Pogson, B.J. and
Schurr, Ulrich and Matsubara, Shizue},
title = {{E}ffects of altered α - and β -branch carotenoid
biosynthesis on photoprotection and whole-plant acclimation
of {A}rabidopsis to photo-oxidative stress},
journal = {Plant, cell $\&$ environment},
volume = {36},
number = {2},
address = {Oxford [u.a.]},
publisher = {Wiley-Blackwell},
reportid = {FZJ-2013-00057},
pages = {438 - 453},
year = {2013},
abstract = {Functions of α- and β-branch carotenoids in whole-plant
acclimation to photo-oxidative stress were studied in
Arabidopsis thaliana wild-type (wt) and carotenoid mutants,
lutein deficient (lut2, lut5), non-photochemical quenching1
(npq1) and suppressor of zeaxanthin-less1 (szl1) npq1 double
mutant. Photo-oxidative stress was applied by exposing
plants to sunflecks. The sunflecks caused reduction of
chlorophyll content in all plants, but more severely in
those having high α- to β-branch carotenoid composition
(α/β-ratio) (lut5, szl1npq1). While this did not alter
carotenoid composition in wt or lut2, which accumulates only
β-branch carotenoids, increased xanthophyll levels were
found in the mutants with high α/β-ratios (lut5, szl1npq1)
or without xanthophyll-cycle operation (npq1, szl1npq1). The
PsbS protein content increased in all sunfleck plants but
lut2. These changes were accompanied by no change (npq1,
szl1npq1) or enhanced capacity (wt, lut5) of NPQ. Leaf mass
per area increased in lut2, but decreased in wt and lut5
that showed increased NPQ. The sunflecks decelerated primary
root growth in wt and npq1 having normal α/β-ratios, but
suppressed lateral root formation in lut5 and szl1npq1
having high α/β-ratios. The results highlight the
importance of proper regulation of the α- and β-branch
carotenoid pathways for whole-plant acclimation, not only
leaf photoprotection, under photo-oxidative stress.},
cin = {IBG-2},
ddc = {570},
cid = {I:(DE-Juel1)IBG-2-20101118},
pnm = {242 - Sustainable Bioproduction (POF2-242)},
pid = {G:(DE-HGF)POF2-242},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000312997700016},
doi = {10.1111/j.1365-3040.2012.02586.x},
url = {https://juser.fz-juelich.de/record/128315},
}