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Studies on the fatty acid content of crambe seed during maturation and effects of abscisic acid and high osmoticum

Wang Youping, Luo Peng, Yang Yi

Department of Biology, Sichuan Union University. Chengdu 610064, Sichuan

Abstract

The change of fatty acid composition of Crambe seed during maturation was analysed. During seed maturation, the contents of saturated fatty acids (i.e., palmitic and stearic acid) decreased. The contents of unsaturated fatty acids changed in different ways, two of them (linolenic and erucic acid) were negatively correlated. ABA and high osmoticum could stimulate the synthesis of long-chained unsaturated fatty acids. After 1 or 3 days^ culture, the contents of erucic and eicosenoic acid in embryos cultured on media with 0.1-10 mol/L ABA or 0.69 mol/L sorbitol were higher than those in embryos developing in situ or cultured on basal medium. These results imply that ABA or high osmoticum may have important regulatory function in seed fatty acid synthesis.

Key words: Crambe abyssinica;Seed maturation;Fatty acid composition;ABA;Sorbitol

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Citing This Article：

Wang Youping, Luo Peng, Yang Yi. Studies on the fatty acid content of crambe seed during maturation and effects of abscisic acid and high osmoticum. Acta Physiol Sin 1996; 48 (4): (in Chinese with English abstract).