广西植物2025，Vol.45Issue(11)：1962-1973,12.DOI:10.11931/guihaia.gxzw202503045
入侵与本地菊科植物种子功能特征差异及其对局域扩散的影响
Differences in seed functional traits between invasive and native Asteraceae plants and their effects on local dispersal patterns
摘要
Abstract
To investigate the effect of Asteraceae seed(achene)morphology and functional traits on plant dispersal,we selected nine Asteraceae species(five invasive species and four native species)from the Ailao Mountain area as study species.We measured the density and frequency of each species along roads in the study site using a plot method.Furthermore,settling velocity,pappus radius,pappus length,seed length,seed width,seed mass,seed germination rate,and pappus loading of each species were measured.The results were as follows:(1)Along the surveyed roads,differences in species frequency were primarily observed among species with no significant differences between invasive and native species;however,invasive plants exhibited significantly higher plant densities compared to native plants.(2)Regarding seed traits,invasive plants had a significantly higher germination rate than native plants,while variations in other seed traits were predominantly species-specific.(3)Correlation analysis showed that no significant correlation was found between seed germination rate and seed mass,whereas seed sedimentation velocity was significantly correlated with seed length and width,and pappus loading.(4)Correlations between seed traits differed between invasive and native plants.For instance,among native species,seed germination rate was negatively correlated with sedimentation velocity,but this trade-off was not observed in invasive species,indicating differing seed ecological strategies between invasive and native plants.(5)For all tested Asteraceae plants,species density was significantly positively correlated with seed germination rate,and no significant correlation was found between species frequency and seed traits.These results suggest that seed morphological traits significantly influence seed dispersal potential,yet they do not fully reflect the actual dispersal outcomes.The higher seed germination rates of invasive Asteraceae plants is an important reason for their high field density formation.关键词
菊科/入侵植物/种子形态特征/冠毛特征/种子扩散Key words
Asteraceae/invasive plants/seed morphological traits/pappus characteristics/seed dispersal分类
农业科技引用本文复制引用
黄振宇,李菊,耿宇鹏,李扬苹..入侵与本地菊科植物种子功能特征差异及其对局域扩散的影响[J].广西植物,2025,45(11):1962-1973,12.基金项目
国家自然科学基金(U23A20160,32471602). （U23A20160,32471602）
