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- W2005901203 abstract "Floral phenotypes may be as much the result of selection for avoidance of some animal visitors as selection for improving the interaction with better pollinators. When specializing on hummingbird-pollination, Penstemon flowers may have evolved to improve the morphological fit between bird and flower, or to exclude less-efficient bees, or both. We hypothesized how such selection might work on four floral characters that affect the mechanics of pollen transfer: anther/stigma exsertion, presence of a lower corolla lip, width of the corolla tube, and angle of flower inclination. We surgically modified bee-pollinated P. strictus flowers changing one trait at a time to make them resemble hummingbird-pollinated P. barbatus flowers, and measured pollen transfer by bumblebees and hummingbirds. Results suggest that, apart from 'pro-bird' adaptations, specific 'anti-bee' adaptations have been important in shaping hummingbird-flowers. Moreover, some trait changes may have been selected for only if changing in concert with other traits." @default.
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- W2005901203 date "2004-07-01" @default.
- W2005901203 modified "2023-10-14" @default.
- W2005901203 title "'Anti-bee' and 'pro-bird' changes during the evolution of hummingbird pollination in Penstemon flowers" @default.
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- W2005901203 doi "https://doi.org/10.1111/j.1420-9101.2004.00729.x" @default.
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