大豆叶片生理生化性状与多聚不饱和脂肪酸形成关系的研究

PHYSIOLOGICAL TRAITS OF SOYBEAN AND FORMATION OF POLYUNSATURATED FATTY ACIDS

利用我国东北高油大豆品种(系)和国外低亚麻酸突变体及其同位基因系,对始花五周后的最大叶片的叶质重、叶绿素和种子的脂肪、脂肪酸、脂肪酶、亚油酸氧化还原酶进行分析结果表明:大豆亚油酸含量与叶绿素b、亚油酸氧化还原酶活性、结荚至成熟期的日照时数呈相关。而亚麻酸含量则与叶质重、结荚至成熟期间的累积温度呈正相关。大豆脂肪含量与叶质重呈显著负相关,而与脂肪酶活性呈正相关。提高大豆种子多聚不饱和脂肪酸R=(18:1)/(18:2+18:3)值是改善油质和提高其含油量的一个较好的选择途径。

High fat cultivars (Lines) from Northeast China and low linolcnic acid mutants with their isolines from abroad vvercr used in this study. Five weeks after first flowering leaf dry weight of unit leaf area and chlorophyll content of the largest leaf content of fat and fatty acid, activiting of lipase and lipoxidase were mensured soparately. The results showed that there were significant positive correlations between content of linoleic acid and Chlb, activity of lipoxidase and hours of ralar radiation from pod -formation to maturation. Linolmec acid content was negatively correlated with leaf weight of unit leaf area and accumulated temperature from pod-formatiom to maturation. Fat content was negatively correlated with the leaf weight of unit leaf area,but was positively correlated activity of lipases.To raise specific value of polyunsaturated fatty acid in seeds of soybeanis a promising selection way for improving fat quility and increasing oil content of seeds.