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Evolution of herbs: key to the conundrum might be tolerance not avoidance

Journal of Plant Ecology 2021年第5期14卷 911-919页

作者： Adam Klimes Martin Weiser tomás Koubek tomás.herben Department of Botany Faculty of ScienceCharles UniversityBenatska 212801 PragueCzech Republic Department of Functional Ecology Institute of BotanyCzech Academy of SciencesDukclska 13537901 TrehonCzecli Republic Department of Population Ecology Institute of BotanyCzech Academy of SciencesZamek 125243 PruhoniceCzech Republic

Aims Woody plants represent the ancestral growth form in angiosperms with herbs evolving repeatedly from *** there are a number of hypotheses about drivers of the evolution of the herbaceous habit,the ability to avoid frost damage in winter by discarding their aboveground biomass has often been invoked as the main force in their *** propose instead that any unpredictable disturbance might have been much more important than the seasonal frost,as herbs easily survive repeated *** We tested this hypothesis by comparing herbs and woody plants in their ability to deal with three types of simulated disturbances,more predictable winter freezing,less predictable spring freezing and *** was made in an experimental common garden setup with 20 species differing in *** evaluated the effects of these disturbances on mortality and regrowth of *** Findings Herbs did not have an advantage over woody plants in survival when exposed to winter *** less predictable conditions of spring freezing herbs survived the treatment better than woody plants and this advantage was even larger in case of the simulated herbivory *** advantage of herbs over woody plants in less predictable conditions suggests that herbaceous growth form might be an adaptation to unpredictable disturbance,which herbs are able to tolerate thanks to their ability to survive loss of aboveground ***,factors such as mammal herbivory or fire might have been the most likely factors in the transition from woody species to herbs.

关键词： common garden experiment herbivory predictability spring freezing winter freezing

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