紫茎泽兰瘦果冠毛特征与种子萌发特性的关系  

Seed germination property of Ageratina adenophora related to pappus features of its achenes

作　　者：李富利 潘燕[1] 王崇云[1] 朱晓媛[1] 彭明春[1] LI Fuli;PAN Yan;WANG Chongyun;ZHU Xiaoyuan;PENG Mingchun(Institute of Ecology and Geobotany,Yunnan University,Kunming 650091,China)

机构地区：[1]云南大学生态学与地植物学研究所,昆明650091

出　　处：《生态科学》2023年第3期46-52,共7页Ecological Science

基　　金：国家自然科学基金项目(31160080,31760152)。

摘　　要：菊科植物瘦果的冠毛是其种子重要的风传播器官。我们分析紫茎泽兰瘦果冠毛与其种子萌发特征的关系,探讨种子传播与萌发定居能力间的权衡关系。结果表明:具不同冠毛数的种子萌发能力无显著差异,不同种子长/冠毛长比值的紫茎泽兰种子萌发率与萌发指数存在显著性差异,种子长/冠毛长比值与种子萌发能力呈正相关关系,二者间表现出一定的权衡关系。Pappus of Compositous plants achenes is very important accessories for anemochory.Pappus characteristics of Ageratina adenophora achenes were analyzed for its effects on seed germination,in order to reveal the trade-off between dispersal ability and colonization.The results indicated that there were no significant distinctions for seed germination between the seeds with different pappus number.Meanwhile,seed germination rate and germination index of A.adenophora with different seed length/crown length ratios were significantly different.The seed length/crown length ratio was significantly positively correlated with seed germination ability,and there was a trade-off relationship between them at certain degree.

关 键 词：紫茎泽兰 种子风传播 冠毛 萌发 权衡 

分 类 号：Q948[生物学—植物学]