大豆低亚麻酸突变体合成位点MGDG的脂肪酸行为  

FATTY ACIDS IN BIOSYNTHETIC POINT MGDG OF 18∶3 OF LOW LINOLENATE MUTANTS A 5 OF SOYBEAN

作　　者：尹田夫[1] Nie.,JH 

机构地区：[1]中国人民解放军农牧大学

出　　处：《大豆科学》1998年第3期213-218,共6页Soybean Science

摘　　要：本文比较了大豆低亚麻突变体（Ａ５）及其诱导前体（Ａ６）亚麻酸合成位点ＭＧＤＧ的脂肪酸变化。研究结果表明低亚麻突变体Ａ５的下胚轴、子叶、上胚轴和真叶中叶绿体被膜亚麻酸合成位点单半乳糖苷二酯酰（ＭＧＤＧ）上亚麻酸（１８∶３）水平均高于Ａ６相应组织。子叶中亚麻酸合成前体磷脂酰胆碱（ＰＣ）配比１８∶０／１８∶３（ｒ１８∶０／１８∶３＝０．８７２＊＊），１８∶１／１８∶３（ｒ１８∶１／１８∶３＝－０．９５８＊＊）以及１８∶２／１８∶３（ｒ１８∶２／１８∶３＝－０．９６５＊＊）分别呈高度显著正相关或负相关。Ａ６真叶中１８∶３水平皆高于上胚轴、子叶、下胚轴和幼根。诸组织中１６∶０、１８∶２和１８∶３水平变化尤为明显，而１８∶０和１８∶１变化较小。幼根中１６∶０和１８∶２水平均高于其他组织，且１８∶２高于１８∶３。A comparative analysis of the composition of PC and MGDG molecular species together with determination of total fatty acids was conducted in the soybean cv A 6 and in A 5, a low 18∶3 mutant, to evaluate the expression of this mutation in the two classes of lipids among various tissues. 16∶0 and 18∶2 levels in roots were higher than in hypecotyl, cotyledons, epicotyl and leaves. 18∶3 level was lower than 18∶2 level in roots. 18∶3 level in leaves was higher than in other tissues. 18∶3 level in hypecotyl, cotyledons, epicotyl and leaves of A 5 were higher than that of A 6. The amount(mol%) of 18∶0/18∶3(r=0.872 * *), 18∶1/18∶3(r=-0.958 * *), and 18∶2/18∶3(r=-0.965 * *)were negative and positive relation at 1% level.

关 键 词：大豆 低亚麻酸突变体 PC MGDG 脂肪酸 

分 类 号：S565.1[农业科学—作物学]