耐寒性桉树早期选择 Ⅲ.巨桉种源和家系膜脂肪酸组成、含量与抗寒性关系  

Early Selection in Cold resistant Eucalyptus Ⅲ.The Relation of Composition and Content of Fatty Acid and Ability of Cold resistant of Eucalyptus grandis' Provenance and Families

作　　者：李志辉[1] 汤珧华 孙汉洲[1] 左海松[3] 

机构地区：[1]中南林学院,中国湖南株洲412006 [2]上海市古树名树工程办公室,中国上海200020 [3]湖南省林业厅,中国湖南长沙410007

出　　处：《中南林学院学报》2000年第3期80-85,共6页Journal of Central South Forestry University

基　　金：国家重点科技攻关项目!"桉树纸浆用材树种良种选育及培育技术研究"( 96-0 11-0 1-0 3 );湖南省林业厅"桉树良种选育"的部分内容

摘　　要：用气相色谱法分析了巨桉 12个种源 80个自由授粉家系的细胞膜脂肪酸的含量和组成 .结果表明 :巨桉茎叶中膜脂肪酸的组成主要是棕榈酸 ( 16∶ 0 )、棕榈油酸 ( 16∶ 1)、油酸 ( 18∶ 1)、亚油酸 ( 18∶ 2 )和亚麻酸 ( 18∶ 3 ) ;不饱和脂肪酸指数 ( IUFA)能较好地反映巨桉家系抗寒性的相对强弱 .生长性状和 IUFA值在种源和家系间存在着显著的差异性 ;IUFA值与纬度相关性显著 ,与其它因素关系不密切 .A quantitative analysis was conducted by gas chromatography for Eucalyptus grandis 's 12 provenance and 80 open pollinated families provided by the Australian Tree Seed Centre. The research results showed: there were main five composition of fatty acid in the leaves of provenance and families of E.grandis . The fatty acid compositions were 16∶0, 16∶1, 18∶1, 18∶2 and 18∶3. IUFA could reflect the relative cold resistant ability of E.grandis and it could be considered as one index to evaluate the ability of cold resistant. There was a significant difference existing between growth traits and IUFA within provenance and families and remarkable correlation between the value of IUFA and influence of latitude.

关 键 词：巨桉 种源 抗寒性 细胞膜脂肪酸 早期选择 

分 类 号：S792.39[农业科学—林木遗传育种] S722.33[农业科学—林学]