綿実種子の成熟過程と各部位中の脂肪酸およびトコフェロール組成,ゴシポール量の変動

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The compositional and quantitative changes in fatty acids, gossypol and tocopherols from embryo, cotyledons and seed coat in cotton seeds, and cotton fiber at eight stages of development from 3 to 65 days after flowering were investigated. The lipid contents of cotyledons in seeds increased during maturation, whereas lipid contents in seed coat were almost constant up to maturity. The main fatty acids in cotyledon and seed coat lipids were palmitic, linoleic, cyclopropene and cyclopropane fatty acids at the initial stage of maturation, but cyclopropene and cyclopropane fatty acids showed a marked decrease from 10 days after flowering. Tocopherols rapidly increased from 20 days after flowering, and the total tocopherol contents in cotyledon, embryo, seed coat and cotton fiber lipids at the 50 days after flowering were 1500, 650, 190 and 200 nmol/g oil, respectively, Main components of tocopherols in embryo and cotyledon lipids from mature seeds were α- and γ-tocopherols, and the δ- and α-tocopherols were mainly present in the seed coat and cotton fiber lipids at the maturity. The gossypol contents in cotyledon, embryo, seed coat and cotton fiber lipids reached a maximum at 40 days after flowering, and decreased ever since.
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