Journal Article

A Novel Carotenoid Derivative, Lutein 3-Acetate, Accumulates in Senescent Leaves of Rice

Makoto Kusaba, Takashi Maoka, Ryouhei Morita and Shinichi Takaichi

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 50, issue 8, pages 1573-1577
Published in print August 2009 | ISSN: 0032-0781
Published online June 2009 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pcp096
A Novel Carotenoid Derivative, Lutein 3-Acetate, Accumulates in Senescent Leaves of Rice

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The biosynthetic pathway of lutein, the most abundant carotenoid in leaves, has been extensively studied, while its degradation pathway during senescence is poorly understood. We found that a novel carotenoid derivative, lutein 3-acetate, accumulates in senescent leaves of rice (Oryza sativa L.). The change in contents of lutein and lutein 3-acetate suggests that lutein is converted to lutein 3-acetate during senescence. Analysis of mutants involved in light-harvesting complex II (LHCII) accumulation and degradation suggests that the converting activity is induced during senescence and that only free lutein, not lutein bound to LHCII, is converted into lutein 3-acetate.

Keywords: carotenoid; leaf senescence; LHCII; lutein 3-acetate; rice

Journal Article.  2446 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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