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Spinescent patterns in the flora of Jiaozi Snow Mountain,Southwestern China

Plant Diversity 2020年第2期42卷 83-91页

作者： Qi Xu Simcha Lev-Yadun Lu Sun Zhe Chen Bo Song Hang Sun Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of Sciences132 Lanhei RoadKunming.650201YunnanChina University of Chinese Academy of Sciences Beijing100049China Department of Biology&Environment Faculty of Natural SciencesUniversity of Haifa-OranimTivon36006Israel

spinescence has been thought to have evolved mainly as a defense against ***,studying its evolution in a whole flora is an excellent approach for understanding long-term plant-herbivore *** this study,we characterized the spinescent plant species of Jiaozi Snow Mountain,Southwestern China,in order to explore the effects of life forms,plant organs,phylogenetic position,and phytogeographical origin on spinescence *** Jiaozi Snow Mountain flora includes 137 spinescent species(9.2%)out of 1488 angiosperm *** found that in these spinescent species,vegetative organs(70.0%)were significantly more defended than reproductive organs(43.8%).Life form had a significant effect on spinescence *** species(18.6%)were more likely to be spiny than non-woody species(6.4%);moreover,woody species mostly defend their vegetative organs(92.2%),whereas herbaceous species mostly defend their reproductive organs(73.3%).For woody plants,leaf habit has a significant effect on ***,spinescence was more common on the reproductive organs of deciduous woody species than on those of evergreen woody species;furthermo re,spinescence was more common on the leaf blades of evergreens than on those of deciduous species;however,the proportion of spinescent petioles in deciduous species was significantly higher than in *** most common spine color was yellow(40.8%),followed by white(16.8%),red(15.8%),and brown(14.3%);furthermore,74.4%of spinescence that showed aposematic color was a different color than the plant organ on which *** findings suggest that spinescence is visually aposematic in the Jiaozi Snow Mountain ***,more families tended to have spines on vegetative organs(83.3%in vegetative organs,50.0%in reproductive organs),but the phylogenetic signals were *** proportion of spinescence was not significantly different between tropical(9.8%of genera,7.6%of species)and temperate(13.2%of ge

关键词： Herbivory Life form Physical defense Trade-off Plant apparency spinescence

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