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000017572 0247_ $$2DOI$$a10.1093/pcp/pcr069
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000017572 084__ $$2WoS$$aPlant Sciences
000017572 084__ $$2WoS$$aCell Biology
000017572 1001_ $$0P:(DE-Juel1)VDB86656$$aBeisel, K.G.$$b0$$uFZJ
000017572 245__ $$aAltered Turnover of beta-Carotene and Chl a in Arabidopsis Leaves Treated with Lincomycin or Norflurazon
000017572 260__ $$aOxford$$bOxford University Press$$c2011
000017572 300__ $$a1193 - 1203
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000017572 440_0 $$024962$$aPlant and Cell Physiology$$v52$$y7
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000017572 520__ $$aInteractions between β-carotene (β-C) and Chl a turnover were investigated in relation to photoinhibition and D1 protein turnover in mature leaves of Arabidopsis (Arabidopsis thaliana) by ¹⁴CO₂ pulse-chase labeling. Following a 2 h treatment of leaves with water, lincomycin (Linco; an inhibitor of chloroplast protein synthesis) or norflurazon (NF; an inhibitor of carotenoid biosynthesis at phytoene desaturation) in the dark, ¹⁴CO₂ was applied to the leaves for 30 min under control light (CL; 130 μmol photons m⁻² s⁻¹) conditions, followed by exposure to either CL or high light (HL; 1,100 μmol photons m⁻² s⁻¹) in ambient CO₂ for up to 6 h. Under both light conditions, ¹⁴C incorporation was strongly decreased for Chl a and moderately suppressed for β-C in Linco-treated leaves, showing a marked decline of PSII efficiency (F(v)/F(m)) and β-C content compared with water-treated leaves. Partial inhibition of carotenoid biosynthesis by NF caused no or only a minor decrease in F(v)/F(m) and Chl a turnover under both conditions, while the β-C content significantly declined and high ¹⁴C labeling was found for phytoene, the substrate of phytoene desaturase. Together, the results suggest coordinated turnover of Chl a and D1, but somewhat different regulation for β-C turnover, in Arabidopsis leaves. Inhibition of carotenoid biosynthesis by NF may initially enhance metabolic flux in the pathway upstream of phytoene, presumably compensating for short supply of β-C. Our observations are also in line with the notion that HL-induced accumulation of xanthophylls may involve a precursor pool which is distinct from that for β-C turnover.
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000017572 650_2 $$2MeSH$$aArabidopsis: metabolism
000017572 650_2 $$2MeSH$$aCarbon Dioxide: metabolism
000017572 650_2 $$2MeSH$$aCarotenoids: metabolism
000017572 650_2 $$2MeSH$$aChlorophyll: biosynthesis
000017572 650_2 $$2MeSH$$aIsotope Labeling
000017572 650_2 $$2MeSH$$aLight
000017572 650_2 $$2MeSH$$aLincomycin: pharmacology
000017572 650_2 $$2MeSH$$aPhotosystem II Protein Complex: metabolism
000017572 650_2 $$2MeSH$$aPlant Leaves: metabolism
000017572 650_2 $$2MeSH$$aPyridazines: pharmacology
000017572 650_2 $$2MeSH$$abeta Carotene: biosynthesis
000017572 650_7 $$00$$2NLM Chemicals$$aPhotosystem II Protein Complex
000017572 650_7 $$00$$2NLM Chemicals$$aPyridazines
000017572 650_7 $$0124-38-9$$2NLM Chemicals$$aCarbon Dioxide
000017572 650_7 $$01406-65-1$$2NLM Chemicals$$aChlorophyll
000017572 650_7 $$0154-21-2$$2NLM Chemicals$$aLincomycin
000017572 650_7 $$027314-13-2$$2NLM Chemicals$$anorflurazone
000017572 650_7 $$036-88-4$$2NLM Chemicals$$aCarotenoids
000017572 650_7 $$0479-61-8$$2NLM Chemicals$$achlorophyll a
000017572 650_7 $$0540-04-5$$2NLM Chemicals$$aphytoene
000017572 650_7 $$07235-40-7$$2NLM Chemicals$$abeta Carotene
000017572 650_7 $$2WoSType$$aJ
000017572 65320 $$2Author$$aArabidopsis thaliana
000017572 65320 $$2Author$$abeta-Carotene
000017572 65320 $$2Author$$aChl
000017572 65320 $$2Author$$aLincomycin
000017572 65320 $$2Author$$aNorflurazon
000017572 65320 $$2Author$$aPhotoinhibition
000017572 7001_ $$0P:(DE-Juel1)129402$$aSchurr, U.$$b1$$uFZJ
000017572 7001_ $$0P:(DE-Juel1)129358$$aMatsubara, S.$$b2$$uFZJ
000017572 773__ $$0PERI:(DE-600)2020758-X$$a10.1093/pcp/pcr069$$gVol. 52, p. 1193 - 1203$$p1193 - 1203$$q52<1193 - 1203$$tPlant & cell physiology$$v52$$x0032-0781$$y2011
000017572 8567_ $$uhttp://dx.doi.org/10.1093/pcp/pcr069
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000017572 9141_ $$y2011
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