高山冰缘植物粗脂肪、可溶性糖和类黄酮的含量变异与环境适应关系的研究  

Studies on the Relationship between the Changes of Fat,Soluble Sugar and Flavoniods and the Adaptation to Environments of Alpine Subnival Plants at the Source of rümqi River

作　　者：刘艳红[1] 安黎哲[2] 郭凤霞[3] 徐世健[2] 

机构地区：[1]中国农业科学院兰州兽医研究所家畜疫病病原生物学国家重点实验室农业部畜禽病毒学重点开放实验室,甘肃兰州730046 [2]兰州大学教育部干旱与草地农业生态重点实验室,甘肃兰州730000 [3]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000

出　　处：《冰川冻土》2007年第6期947-952,共6页Journal of Glaciology and Geocryology

基　　金：国家自然科学基金项目(30470277);甘肃省星火计划项目(5HS-066-A-91-013-02);甘肃省科技攻关项目(GS022-A41-045)资助

摘　　要：以乌鲁木齐河源区3个植被垂直分布带的22种主要冰缘植物花期叶片为实验材料,分析了叶片的粗脂肪、可溶性糖和类黄酮的含量.研究结果表明:同一植被带有些植物之间的这3种生理抗性物质含量接近,有些植物的含量却存在显著差异,与植物自身的遗传特性和采取的生态对策有关.从样品平均含量值的统计分析看,高山流石堆植被的粗脂肪、可溶性糖和类黄酮含量高于垫状和高山草甸植被的含量,3个分布带植物的可溶性糖平均含量存在显著差异,类黄酮平均含量不存在显著差异.多数高山冰缘植物积累高含量的粗脂肪、可溶性糖和类黄酮,提高了植物的抗冻和抗紫外线辐射的能力,是植物适应冰缘环境的物质基础,这些生理抗性物质在含量上的差异说明可溶性糖是增加冰缘植物抗冻性的关键物质.The difference of fat, soluble sugar and flavoniods extracted from the leaves of 22 main alpine subnival plants in flowering stage growing in the source areas of the Urumqi River were investigated. It was shown that some subnival plants had little change of fat, soluble sugar and flavoniods, and others had marked difference in these contents under the similar environments. These characteristics were related to the genetic background and the ways of plants adapted to environments. According to statistical analysis for the three vegetation zones, the average contents of fat and flaviods in-crease with altitude. Contents of soluble sugar have significant variance among the three vertical vegetations zones. Flavoniods increase with altitude, with no evidence indicating significant variance among vegetations in the three zones. Most species of subvinal plants accumulate a great amount of fat, soluble sugar and flavoniods, beneficial to resist frost. It is shown that alpine subnival plants containing high accumulation of soluble sugar develope a mechanism of diverse adaptation to the environments.

关 键 词：高山冰缘植物 生理抗性物质 含量变异 环境适应 

分 类 号：Q948.12[生物学—植物学]