Real-time divergent evolution in plants driven by pollinators.
Real-time divergent evolution in plants driven by pollinators.
复制标题
DOI：
10.1038/ncomms14691
复制
发表时间：
2017-03-14
影响因子：
16.6
通讯作者：
Schiestl FP
中科院分区：
文献类型：
--
作者：
Gervasi DD;Schiestl FP
传粉者驱动的多样化被认为是植物花部变异的主要来源。然而，我们对这一过程的了解仅限于对进化变化的间接评估。在这里，我们采用快速循环的芜菁植物的实验进化，以证明不同的传粉者驱动的适应性进化。我们的研究表明，传粉者驱动的分歧选择以及分歧的植物性状的进化。由熊蜂授粉的植物进化出更高的尺寸和更香的花朵，增加了紫外线反射。在实验结束时，大黄蜂更喜欢由大黄蜂授粉的植物，而不是由食蚜蝇授粉的植物，这表明植物已经适应了大黄蜂的偏好。植物与hoverfly授粉变得更短，减少了一些花挥发物的排放，但增加健身通过增强自主自花授粉。我们的研究表明，传粉者群落的变化可能会对植物性状和交配系统的进化产生迅速的影响。传粉者被认为是植物多样化的驱动力，但它们的影响很难与其他生物和非生物因素分开。在这里，作者让植物在不同的授粉制度下进化，表现出快速和分化的株高，花部性状和交配系统的进化。
Pollinator-driven diversification is thought to be a major source of floral variation in plants. Our knowledge of this process is, however, limited to indirect assessments of evolutionary changes. Here, we employ experimental evolution with fast cycling Brassica rapa plants to demonstrate adaptive evolution driven by different pollinators. Our study shows pollinator-driven divergent selection as well as divergent evolution in plant traits. Plants pollinated by bumblebees evolved taller size and more fragrant flowers with increased ultraviolet reflection. Bumblebees preferred bumblebee-pollinated plants over hoverfly-pollinated plants at the end of the experiment, showing that plants had adapted to the bumblebees' preferences. Plants with hoverfly pollination became shorter, had reduced emission of some floral volatiles, but increased fitness through augmented autonomous self-pollination. Our study demonstrates that changes in pollinator communities can have rapid consequences on the evolution of plant traits and mating system. Pollinators are thought to be a driver of plant diversification, but their effects are difficult to disentangle from those of other biotic and abiotic factors. Here, the authors let plants evolve under different pollination regimes and show rapid and divergent evolution of plant height, floral traits and mating system.