From a bee's eye:Effects of UV bullseye size on reproductive success in a dioecious vine Herpetospermum pedunculosum(Cucurbitaceae)  

作　　者：Jin-Feng Wu Zhu-Qing Chen Xi-Long Wang Yan-Li Tu Lin-Lin Wang Yong-Ping Yang Li-Hua Meng Yuan-Wen Duan 

机构地区：[1]School of Life Sciences,Yunnan Normal University,Kunming 650092,Yunnan,PR China [2]Department of Plant Resources,Xizang Plateau Institute of Biology,Lasa 850000,Xizang,PR China [3]The Germplasm Bank of Wild Species,Institute of Tibetan Plateau Research at Kunming,Kunming Institute of Botany,Chinese Academy of Sciences,Kunming 650201,Yunnan,PR China [4]Yunnan Lijiang Forest Ecosystem National Observation and Research Station,Kunming Institute of Botany,Chinese Academy of Sciences,Lijiang,674100,Yunnan,PR China

出　　处：《Plant Diversity》2024年第6期766-773,共8页植物多样性（英文版）

基　　金：National Natural Science Foundation of China(32160261);the Second Tibetan Plateau Scientific Expedition and Research(STEP)program(2019QZKK0502);Science and Technology Program of Xizang Autonomous Region(XZ202001YD0008C).

摘　　要：Descriptions of floral traits based on the visual capabilities of pollinators would advance our understanding of flower evolution and plantepollinator relationships.One such trait is the contrasting UV bullseye color pattern,which is invisible to human eyes but can be perceived by bee pollinators.However,it remains largely unknown how UV bullseye size affects male and female reproductive fitness.We examined UV bullseye patterns in the dioecious Herpetospermum pedunculosum,and quantified the effects of UV bullseye size on male and female fitness.Both UV bullseye size and flower size were larger in male flowers than in female flowers.The dominant pollinators of H.pedunculosum were bees,which could perceive the UV bullseye pattern.Bee pollinators exhibited a preference for male flowers with nectar rewards,and visited a greater number of male flowers on plants with a larger UV bullseye.Male reproductive fitness was found to decrease in plants with larger UV bullseyes,likely due to the high rate of intra-plant pollen transfer.Rewardless female flowers were less attractive to bee pollinators,resulting in pollen limitation of seed production.Female flowers with moderate UV bullseye size produced more seeds.Our results suggest that UV bullseye is subject to different selection via male and female fitness of H.pedunculosum with deceptive pollination,and large UV bullseye is generally not favored.This research is the first to examine the relationship between UV bullseye size and plant reproductive success,highlighting that floral evolution should be investigated from the pollinator's eye in future research.

关 键 词：UV bullseye Pollinator behavior Flower display Male and female fitness Herpetospermum pedunculosum 

分 类 号：Q948[生物学—植物学]