Linkages among the functional traits,insect visitation rate and seed set of Gentiana taxa on the Tibetan Plateau  

作　　者：DAI Wen-fei GAO Rui HE Meng-ying YANG Yu-lian LI Fang-lan MU Jun-peng 

机构地区：[1]Ecological Security and Protection Key Laboratory of Sichuan Province,Mianyang Normal University,Mianyang 621000,China [2]Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization,Chengdu Institute of Biology,Chinese Academy of Sciences,Chengdu 610041,China

出　　处：《Journal of Mountain Science》2022年第8期2312-2321,共10页山地科学学报（英文）

基　　金：funded by National Natural Science Foundation of China(31870393,31270513);the open project from the Ecological Security and Protection Key Laboratory of Sichuan Province(ESP111503)。

摘　　要：Maximum plant height(H_(max)),stem tissue mass density(SD),leaf mass per area(LMA),and relative growth rate(RGR)have all been linked to flowering phenology.However,it is still unknown whether these functional traits varying with flowering phenology are related to other floral traits associated with pollinator preference and reproductive success.We investigated the relationship between vegetative and floral traits,as well as the rates of insect visitation and seed set of fiveGentiana species in eastern Tibetan meadows.Our results showed that flowering onset and flowering offset time were all found to be positively correlated with the H_(max),SD,and LMA,but negatively correlated with the RGR.Flowering onset time was positively correlated with corolla diameter and pollen grain number,whereas was negatively correlated with flower number and flower longevity.The rates of insect visitation were positively related to flowering onset time,pollen grain number,corolla diameter,and seed set,but negatively related to flower number and longevity.Early flowering species have higher RGR but lower SD,LMA andH_(max),as well as smaller flowers,fewer pollen grains,longer flower longevity,and lower insect visitation rates than late-flowering plant species.Our findings indicate that floral traits are related to vegetative traits in Gentiana species.Also these plant trait relationships were associated with pollinator preference,and plant reproductive success of eastern Tibetan meadows.We speculate that these traits relationships are likely adaptive in unpredictable and often pollinator-limited environments in the Tibet alpine meadows.

关 键 词：Life history strategy Mating system Reproductive efficiency Alpine plant 

分 类 号：Q948[生物学—植物学]