花生种子发育及萌发时期脂肪酸积累与降解模式

摘要

本研究分析了高油花生品种花U606及普通含油量品种花17在种了形成和萌发后两个不同阶段粗脂肪与脂肪酸积累和降解变化规律,结果表明:2个品种中各种脂肪酸含量与含油量的变化趋势基本一致,在种子发育阶段粗脂肪的积累都呈“S”型曲线增长趋势,脂肪酸的组成一致但变化幅度不尽相同,亚麻酸仅在幼果期能检测到;在萌发不同时期,花U606在油脂降解过程脂肪酸成分变化比较明显,且有新的脂肪酸C22∶6生成,而花17中脂肪酸组分变化不大,说明不同含油量品种在萌发后不同阶段各种脂肪酸的降解模式不同.本研究为揭示高油形成的分子机制奠定基础.%High-oil peanut cultivar Hua U606 and medium-oil cultivar Hua 17,were used to analyze the changes of their oil content and composition of fatty acid at development and germination stages.The results showed that fatty acid and oil content of two materials varied consistently.The composition of fatty acids lay on "S" curve in the seed development stages.Linolenic acid appeared only in young seeds.In post-germination stages fatty acid composition of Hua U606 changed significantly,and new fatty acids C22∶6 were detected comparing to Hua 17,indicating the difference of degradation pattern between two cultivars in germination stages.This study preliminary revealed the dynamic changes of lipid and fatty acid in different stages and provided better understanding of the molecular mechanisms for high-oil peanut germplasm.