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Alternate energy dissipation? Phenolic metabolites and the xanthophyll cycle


Close, DC and Beadle, CL, Alternate energy dissipation? Phenolic metabolites and the xanthophyll cycle, Journal of Plant Physiology, 160, (4) pp. 431-434. ISSN 0176-1617 (2003) [Refereed Article]

DOI: doi:10.1078/0176-1617-00915


The dynamics of phenolic galloylglucoses (di-, tri-, tetra-, and penta-galloylglucose), flavonoids (quercitin and quercitin glycosides) and sideroxylonal were compared with that of xanthophyll cycle-dependent energy dissipation during rapid induction of chilling-dependent photo-inhibition. Pre-dawn xanthophyll cycle engagement of seedlings of Eucalyptus nitens transferred from mild nursery conditions to a low temperature controlled environment increased logarithmically during eight days of treatment. Photochemical efficiency and flavonoids decreased after four days of treatment and non-photochemical quenching after two days of treatment. Galloylglucoses and sideroxylonal decreased linearly during treatment. These results demonstrate that rapid changes in foliar phenolic levels are associated with abrupt changes in the plant environment. It is argued that under these growth-chamber conditions, the xanthophyll cycle facilitated dissipation of excess light energy, lessening the requirement for the dissipation of energy or antioxidant activity through phenolic metabolites.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Environmentally sustainable plant production
Objective Field:Environmentally sustainable plant production not elsewhere classified
UTAS Author:Close, DC (Professor Dugald Close)
UTAS Author:Beadle, CL (Dr Christopher Beadle)
ID Code:48211
Year Published:2003
Web of Science® Times Cited:11
Deposited By:Plant Science
Deposited On:2007-10-02
Last Modified:2011-11-16

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