Effects of Flowering Mode and Pollinator Sharing on Reproductive Success in Natural Hybrid of Two Epimedium(Berberidaceae)Species  

作　　者：Lanying Chen Qiumei Quan Yunxiang Li 

机构地区：[1]College of Life Sciences,China West Normal University,Nanchong,637000,China [2]School of Ecology and Environment,Tibet University,Lasha,850000,China [3]College of Environment Science and Engineering,China West Normal University,Nanchong,637000,China

出　　处：《Phyton-International Journal of Experimental Botany》2024年第3期551-566,共16页国际实验植物学杂志（英文）

基　　金：This research was supported by the Natural Science Foundation of Sichuan Province(No.2023NSFSC1282);the National General Cultivation Project of China West Normal University(No.19B029);Youth Foundation Specialization of West China Normal University(No.22KB004).

摘　　要：Mediated by pollenflow,natural hybridization is deemed a crucial factor that propels speciation infloral plants.Despite the fact that the diversity of Epimedium species is concentrated mainly in Southwestern China,the poten-tial impact of interspecific pollination on natural hybridization has yet to be empirically scrutinized.To explore this,we studied theflowering period and the visitors offlowers in three frequently overlapping Epimedium species at Jinchengshan National Forest Park,located in Nanchong,Sichuan Province.Additionally,we performed a ser-ies of pollination experiments to examine breeding systems and hybrid compatibility.Morphologically,Epime-dium pubescens and Epimedium wushanense are clearly distinct and easily recognizable byflower morphology,while the putative hybrid is morphologically intermediate between them.Our observation revealed that E.pub-escens and E.wushanense had 15 days of overlapping anthesis.Both species are self-incompatible and require pol-linator services for successful reproduction.Although their pollinators differ in quantity and species,Lasioglossum sp.(Hymenoptera:Halictidae)visited all three species.Artificial pollination revealed no breeding barriers among the three species,and the resulting hybrid seeds exhibited fertility.The overlapping time offlowering,commonfloral visitors,and compatibility of hybrids may be important factors contributing to successful interspecific pol-lination and speciation for natural hybrid species of E.pubescens and E.wushanense.Consequently,the role of potential interspecific pollination is crucial for hybrid speciation and the evolutionary dynamics of Epimedium species.

关 键 词：Breeding system floral visitor medicinal plant species evolution 

分 类 号：Q94[生物学—植物学]