METHODS: We utilized a lineage within the buzz-pollinated Miconia as study system, contrasting floral traits between montane AF-endemic and non-endemic species. We measured and validated floral traits that were proxies for pollinator attraction, reward access, pollen transfer capacity, and self-pollen deposition. We inferred the evolution of floral trait via phylogenetic comparative methods.
RESULTS: AF-endemic species have selectively evolved greater reward access and more frequently had generalist pollination. Nonetheless, AF-endemic species also have selectively evolved toward lower pollen transfer capacity and greater self pollination. These patterns indicated a complex evolutionary process that has jointly favored a generalized and the selfing syndromes.
CONCLUSIONS: The buzz pollination syndrome can undergo an evolutionary disruption in montane areas of the AF domain. This floral syndrome is likely more labile than often assumed, allowing buzz-pollinated plants to reproduce in environments where vibrating bees are less-reliable pollinators.
方法:我们利用蜂鸣授粉的米孔尼亚中的一个谱系作为研究系统,山地AF特有物种和非特有物种之间的花卉性状对比。我们测量并验证了作为传粉媒介吸引代理的花卉性状,奖励访问,花粉传递能力,和自花粉沉积。我们通过系统发育比较方法推断了花卉性状的进化。
结果:AF特有物种选择性地进化出了更大的奖励途径,并且更频繁地进行了通才授粉。尽管如此,AF特有物种也选择性地向较低的花粉转移能力和较大的自花授粉进化。这些模式表明了一个复杂的进化过程,该过程共同有利于广义和自交综合征。
结论:蜂鸣授粉综合征可在AF域的山地区域发生进化破坏。这种花综合征可能比通常认为的更不稳定,允许蜂鸣授粉的植物在振动蜜蜂不太可靠的传粉者的环境中繁殖。