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中国植物学会第十六次全国会员代表大会暨85周年学术年会

作者： Kingchun Tai Encheng Yang Chunneng Wang Institute of Ecology and Evolutionary Biology National Taiwan University Department of Entomology National Taiwan University

A classic view asserted that floral color assembly could be shaped by the pollinator ***,the floral color assembly could be alternatively explained by competition for pollinators they ***,we analyzed the floral color assembly from low altitude to alpine region in a subtropical island Taiwan,through the bee perceptual color space,in an effort to evaluate whether these two models could compatibly account for the floral color assembly along *** found that the diversity of the floral colors in middle（1500-2200 m） and high altitudes（over 2850 m） were significantly lower than that of low altitude regions（below 900 m）,which could be partly explained by the declined abundance of pollinators with increasing ***,the chromatic signals of the alpine species most fit with the discrimination ability of bees’ vision,which suggested that bees might be the most important pollinator in the subtropical alpine *** addition,the alpine species exhibited larger divergence of the floral colors than expected by chance,but no similar trends were observed in low and middle *** considering phylogenetic structure,sympatric alpine species tend to be phylogenetically related（clustering） but floral colors of related species tend to be diverse（weak phylogenetic signal）.This suggested that the related alpine species may evolve different floral colors to reduce the interspecific competition for limited ***,our results first demonstrated that the floral color assembly along altitudes in a subtropical island could respectively adapted to the pollinator preference model and competition mode.

关键词： pollinator preference pollinator-mediated competition Floral color assembly Reflectance spectrums Bee color vision Phylogenetic structure Phylogenetic signal

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Does persistence of showy calyces in Limonium leptolobum enhance pollinator attraction?

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Journal of Plant Ecology 2015年第2期8卷 182-186页

作者： Ai-Qin Zhang Shuang He Ya-Xin Zhai Shuang-Quan Huang College of Life Science and Technology Xinjiang UniversityNo.14 Victory AvenueUrumqi 830046China School of Life Sciences Central China Normal University152 Luoyu AvenueHongshan DistrictWuhan 430079China

Aims The calyx,the outermost whorl of a flower(usually green),has been considered to function to protect *** some species,how-ever,calyces are colorful and retained during seed *** species have been exploited as cut flower crops because the calyces persist for several months after the corolla has *** explore the adaptive significance of the persistent calyx in a desert plant Limonium leptolobum,we ask whether persistence of caly-ces can enhance pollinator attraction by enlarging floral displays,increasing reproductive success in this self-incompatible *** The yellow flower of *** lasted 1-2 days but its white,membranous calyx extended fully after the corolla closed,and per-sisted for over 2 months in the field,making hundreds of‘showy flowers’on one *** examine the ecological function of calyces,we test the pollinator attraction *** an experi-mental population,we compared the difference in visit frequency and visitor behavior between intact inflorescences and inflores-cences with their calyces removed on the same individual *** findingsin four experimental plots four types of floral visitors were observed including bees,butterflies,syrphid flies and day-flying *** significant preference was observed between calyx-free and intact inflorescences for both first arrivals and total visit frequency of all types of floral visitors,indicating that the persistence of calyces did not make plants more attractive to potential *** pollina-tor attraction hypothesis for the showy calyces was not supported by the current *** the calyx in this desert plant helps seed development or has other functions needs further study.

关键词： Limonium leptolobum calyx floral traits pollinator preference advertisement ecological function

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