锡林郭勒草原克氏针茅抗旱生理变化的研究  

Study of the change of drought-resistant physiology of Stipa krylovii in Xilinguole steppe

作　　者：王艳芳[1] 韩冰[2] 张占雄[1] 

机构地区：[1]内蒙古农业大学生物工程学院,内蒙古呼和浩特010018 [2]内蒙古大学生命科学学院,内蒙古呼和浩特010021

出　　处：《草业科学》2006年第2期22-26,共5页Pratacultural Science

基　　金：国家基金项目(30060015);内蒙古大学高层次人才启动金

摘　　要：为揭示不同生长时期、不同地区克氏针茅Stipa krylovii抗旱性,对内蒙古锡林郭勒草原5个地区克氏针茅的某些抗性生理指标:丙二醛(MDA)、超氧化物歧化酶(SOD)、过氧化物酶(POD)、脯氨酸(Pro)进行比较分析,结果表明:5月份(生长初期)克氏针茅MDA含量最高,POD、SOD活性最低;7月份(盛期)与9月份(末期)MDA含量降低,POD、SOD活性增加,而游离脯氨酸含量变化并不规律。综合分析表明,克氏针茅在分布区内,随着降水量的减少,游离Pro含量和保护酶活性增加,MDA减少,在生理方面表现出对环境较强的适应性。In order to determine the drought resistance of Stipa krylovii from different regions and of different growing stages in Xilinguole in Inner Mongolia, The physiological index of S. krylovii from five regions were examined . The results indicated that MDA content was the highest in May, while POD and SOD activities were the lowest; following MDA content cleclined in July and September, POD and SOD activities increased, while the changing of Pro content was not very regular. In a whole, along with the decrease of the precipitation MDA content decreased. S. hrylovii had higher , Pro content and enzyme activity increased, while adaptability to environment from the physiological aspect.

关 键 词：克氏针茅 抗旱 脯氨酸 丙二醛 超氧化物歧化酶 过氧化物酶 

分 类 号：Q945.78[生物学—植物学]