Are long corolla tubes in Pedicularis driven by pollinator selection?

分类： 生物学 >> 植物学 >> 植物学研究、实验与植物演化、发展 提交时间： 2016-05-03

Shuang-Quan Huang Xiang-Ping Wang Shi-Guo Sun

摘要： The evolution of long corolla tubes has been hypothesized to be driven by long-tongued pollinators. Corolla tubes in Pedicularis species can be longer than 10cm which may function as flower stalks to increase visual attractiveness to pollinators because these species provide no nectar and are pollinated by bumblebees. The corolla tube length was manipulated (shorter or longer) in two Pedicularis species in field to examine whether longer tubes are more attractive to pollinators and produce more seeds than short tubes. Our results did not support the pollinator attraction hypothesis, leaving the evolution of long tubes in Pedicularis remains mysterious.

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