منابع مشابه
Modelling xanthophyll photoprotective activity in phytoplankton
A numerical model describing xanthophyll dynamics in phytoplankton has been developed and used to investigate cellular photoprotective response. The model assumes that, under the transition from limiting to supra-saturating light, the xanthophyll cycling pigments (PX) synthesis implies first (on a time scale of tens of minutes) a stoichiometric conversion of the already existing fucoxanthin (FU...
متن کاملThiophenes of Tagetes Flowers and Partial Purification of Xanthophyll Esters
Lutein is a health promoting xanthophyll that may be extracted from marigold flowers. But the plant is known also for biosynthesis of phototoxic polythiophenes. Extracts of flowers of some Tagetes species grown in Belgorod (RF) T. erecta L. (cv. Gavaii) , T. patula L. (cv. Petit orange), T. tenuifolia Cav. (unknown cv.), and T. lucida Cav. were investigated by thin layer chromatography (TLC) an...
متن کاملAstaxanthin, a xanthophyll carotenoid, inhibits ultraviolet-induced apoptosis in keratinocytes.
Intra-cellular reactive nitrogen/oxygen species and apoptosis play important roles in ultraviolet (UV)-induced inflammatory responses in the skin. Astaxanthin (AST), a xanthophyll carotenoid, exhibits diverse clinical benefits. The protective effects of AST against UV-induced apoptosis were investigated in the present study. Astaxanthin (5 μm) caused a significant decrease in the protein conten...
متن کاملRetrieval of the PRI to assess xanthophyll cycle activity
Retrieval of the photochemical reflectance index for assessing xanthophyll cycle activity: a comparison of near-surface optical sensors A. Harris, J. Gamon, G. Z. Pastorello, and C. Wong Geography, School of Environment, Education and Development, University of Manchester, Manchester, M13 9PL, UK Departments of Earth & Atmospheric Sciences and Biological Sciences, University of Alberta, Edmonto...
متن کاملExpression of xanthophyll biosynthetic genes during light-dependent chloroplast differentiation.
In higher plants, etioplast to chloroplast differentiation is characterized by dramatic ultrastructural changes of the plastid and a concomitant increase in chlorophylls and carotenoids. Whereas the formation and function of carotenes and their oxygenated derivatives, the xanthophylls, have been well studied, little is known about the regulation of the genes involved in xanthophyll biosynthesis...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1996
ISSN: 0021-9258
DOI: 10.1074/jbc.271.46.28861