摘要
将 1 994年从内蒙古不同地区和吉林采集到的羊草 ( Leymuschinensis)种子进行栽培试验 ,分析了 5个样点 (阿旗、定位站、西乌旗、谢尔塔拉、吉林 )的羊草在不同浓度聚乙二醇 ( PEG=0 %、1 5%、3 0 %)的胁迫下 ,及不同胁迫时间 ( 1 2 h、2 4 h、3 6h)条件下 ,叶片游离脯氨酸和水分的含量。通过聚类分析表明 :不同地理种群的羊草按水分胁迫后游离脯氨酸含量和水分含量都可划分成 3类 ,而且所得的结果基本相似。结果还证明 ,抗旱性强的样品游离脯氨酸积累时间长 ,维持积累量大 ;
we studied different geographic population′s Leymus chinensis, Which came from the seeds we got from different typical steppes of the Inner Mongolian Plateau.we selected the Leymus chinensis of five sampling point,analyses the free proline and water content of the leaf under the force of different consistency PEG(0%,15% and 30%)and different force time(12 h,24h and 36h)Using UPGMA analysis,we found that the five geographic population could be divided into three groups according to the changes of the free proline and water content of the leaf,which was consistent to their natural habitats.It was detected that the free proline of the strong drought resistance sample accumulated for a long time and maintained a large accumulation.The drought resistance of the Leymus chinensis was connected to a certain extent with the proline accumulation property and the habitat.
出处
《生态学报》
CAS
CSCD
北大核心
2000年第2期349-352,共4页
Acta Ecologica Sinica
基金
国家自然科学基金重点项目"植物种群生态适应机理研究"资助! ( 3 93 3 0 0 50)
关键词
羊草
地理种群
聚乙二醇
游离脯氨酸
含水量
Leymus chinensis
different geographic population
PEG
free proline
water content
