青藏高原东缘小花风毛菊花期繁殖分配的海拔差异  

Reproductive allocation changes from Saussurea parviflorain eastern edge of Qinghai-Tibet Plateau at various altitudes during flowering

作　　者：杨亚军[1] 王一峰[1] 祁如林 杨洋[1] 

机构地区：[1]西北师范大学生命科学学院逆境植物资源与生态实验室,兰州730070

出　　处：《四川大学学报（自然科学版）》2018年第1期207-213,共7页Journal of Sichuan University(Natural Science Edition)

基　　金：国家自然科学基金(31460105);国家中医药管理局项目(201207002);甘肃省自然科学基金(1208RJZA126);兰州市科技局项目(2013-4-89);甘肃省生态学;生物学重点学科项目

摘　　要：通过采样调查法和烘干称重法,对分布在青藏高原东缘不同海拔高度下的小花风毛菊的花期繁殖分配进行研究,结果表明:1)花期植株地上生物量、株高、管状小花数目、繁殖器官及营养器官生物量均随海拔升高呈线性递减趋势,管状小花生物量随海拔升高呈线性递增趋势;2)花期繁殖分配随海拔升高呈线性递增趋势;3)花期繁殖分配随个体大小(地上生物量和株高)的增大呈线性递减趋势;4)花期管状小花生物量与管状小花数目之间存在权衡现象.To study the effect of elevation on the reproductive allocation of S. parviflora during tlae flowering, sampling survey method and weighting after dried method are chosen so as to study S. parvi- flora＇s morphological features at various altitudes. It show that, firstly, during flowering,above-ground biomass in plant itself and its organs related to reproduction and vegetation has an obvious trend of de- creasing as altitude goes up. Besides, its number and stem length also slope down little by little. On the contrary, tubuliflorous biomass and reproductive allocation take on a relative trend of increasing and prosperity. Secondly,a shift phenomenon in balance from tubuliflorous biomass and its number would probably be formed.

关 键 词：海拔差异 繁殖分配 小花风毛菊 权衡 个体大小 

分 类 号：Q948[生物学—植物学]