Elevational and temporal patterns of pollination success in distylous and homostylous buckwheats(Fagopyrum)in the Hengduan Mountains

作     者：Ling-Yun Wu Shuang-Quan Huang Ze-Yu Tong Ling-Yun Wu;Shuang-Quan Huang;Ze-Yu Tong

作者机构：Faculty of Resources and Environmental ScienceHubei UniversityWuhan 430062China Institute of Evolution and EcologySchool of Life SciencesCentral China Normal UniversityWuhan 430079China 

出 版 物：《Plant Diversity》 (植物多样性（英文版）)

年 卷 期：2024年第46卷第5期

页      面：661-670页

核心收录：

学科分类：09[农学] 0901[农学-作物学] 

基　　金：supported by the National Natural Science Foundation of China(Nos.31900204,32071671,32030071) the Postdoctoral Research Foundation of China(grant no.2019M652674) the Fundamental Research Funds for the Central Universities(grant no.CCNU22LJ003) 

主　　题：Biodiversity hotspot Elevation gradient Fagopyrum Stigmatic pollen load Temporal pattern 

摘      要：Reproductive strategies of sexually dimorphic plants vary in response to the ***,we ask whether the sexual systems of Fagopyrum species(i.e.,selfing homostylous and out-crossing distylous)represent distinct adaptive strategies to increase reproductive success in changing alpine *** answer this question,we determined how spatial and temporal factors(e.g.,elevation and peak flowering time)affect reproductive success(i.e.,stigmatic pollen load)in nine wild Fagopyrum species(seven distylous and two homostylous)among 28 populations along an elevation gradient of 1299-3315 m in the Hengduan Mountains,southwestern *** also observed pollinators and conducted hundreds of hand pollinations to investigate inter/intra-morph compatibility,self-compatibility and pollen limitation in four Fagopyrum species(two distylous and two homostylous).We found that Fagopyrum species at higher elevation generally had bigger flowers and more stigmatic pollen loads;lateflowering individuals had smaller flowers and lower pollen *** pollen deposition was more variable in distylous species than in homostylous *** seed set was not pollenlimited in all species,we found that fruit set was much lower in distylous species,which rely on frequent pollinator visits,than in homostylous species capable of autonomous *** findings that pollination success increases at high elevations and decreases during the flowering season suggest that distylous and homostylous species have spatially and temporally distinct reproductive strategies related to environment-dependent pollinator activity.