title: A novel carotenoid derivative, lutein 3-acetate, accumulates in senescent leaves of rice.
abstract: 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.
authors: Graduate School of Science, Hiroshima University, Higashi-hirosima 739-8526, Japan. akusaba@hiroshima-u.ac.jp
authors: Makoto
authors: M
authors: Kusaba
authors: Takashi
authors: T
authors: Maoka
authors: Ryouhei
authors: R
authors: Morita
authors: Shinichi
authors: S
authors: Takaichi
mesh_terms: D002734:Chlorophyll / Q000378:metabolism; D045342:Light-Harvesting Protein Complexes / Q000378:metabolism; D014975:Lutein / Q000096:biosynthesis*; D012275:Oryza / Q000378:metabolism*; D018515:Plant Leaves / Q000378:metabolism*
chemical_list: D045342:Light-Harvesting Protein Complexes; D002734:Chlorophyll; C037184:chlorophyll b; D014975:Lutein