青藏高原东缘风毛菊属5种10个居群植物种子的萌发特性研究  

A study on seeds germination of five species(ten populations) of Saussurea DC. in Qinghai-Tibetan Plateau

作　　者：王一峰[1,2] 李岩[1] 代建霄[1] 胡玥[1] 武凌云[1] 王云瑾[1] 王转莉[1] 梁万福[1] 

机构地区：[1]西北师范大学生命科学学院,甘肃兰州730070 [2]兰州大学干旱与草地生态教育部重点实验室,甘肃兰州730000

出　　处：《西北师范大学学报（自然科学版）》2009年第3期87-92,共6页Journal of Northwest Normal University(Natural Science)

基　　金：甘肃省自然科学基金资助项目(3ZS051-A25-024);甘肃省中青年基金资助项目(3YS061-A25-031);甘肃省教育厅科研基金资助项目(041-15);西北师范大学大学生科研资助金课题

摘　　要：首次对产于青藏高原东缘风毛菊属(Saussurea DC.)5种10个居群不同海拔的植物进行了种子萌发特性研究,分析了海拔与种子大小与萌发特性之间的关系.结果表明,低海拔的种子种子萌发率低,高海拔的种子种子萌发率高;高海拔植物种子的萌发时滞较低海拔植物种子萌发时滞短;百粒重与萌发指数成正比关系,即种子越大萌发速率越小;海拔与百粒重、萌发持续时间和萌发高峰期之间无明显规律.The seed germination characteristics of five species（ten populations） of Saussurea D C. in the eastern of Qinghai-Tibetan Plateau are studied for the first time, and the relationship between the altitudes and the seed size and the seed germination characteristics are analysed. The results are as follows： The seed germination rate has negative correlation with altitudes; The time to onset of germination of high altitude seeds is shorter than that of low altitude seeds; Hundred kernels weight has positive correlation with the germination index, it means that the bigger the seed is, the lower the germination rate is; There is no obvious law between altitudes and hundred kernels weight, time to onset of germination, and time to maximum germination.

关 键 词：风毛菊属 种子萌发特性 海拔 青藏高原 

分 类 号：Q944.59[生物学—植物学]