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- W2134736922 abstract "To study the isolation mechanism of two commonly intermingled louseworts, Pedicularis rhinanthoides and Pedicularis longiflora, pollination biology in three mixed populations with the two species was investigated during a 3-year project. The results indicated that higher flowering density could help to enhance pollinator activity, and thus increase reproductive output. Bumblebees are the exclusive pollinator for the two louseworts and are essential for their reproductive success. Reproductive isolation between the two species is achieved by a combination of pre- and postzygotic isolation mechanisms. Although both species are pollinated by bumblebees, the present study indicates they successfully avoid interspecific pollen transfer due to floral isolation. Mechanical isolation is achieved by the stigma in the two species picking up pollen from different parts of the pollinator's body, whereas ethological isolation occurs due to flower constancy. Additionally, strong postzygotic isolation was demonstrated by non seed set after artificial cross-pollination even with successful pollen tube growth. We describe the hitherto unreported role of variation in the tightness and direction of the twist of the corolla beak in maintaining mechanical isolation between Pedicularis species. Although floral isolation in Pedicularis is incomplete, it is considered to be an important mechanism in maintaining species boundaries in the genus." @default.
- W2134736922 created "2016-06-24" @default.
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- W2134736922 date "2007-01-01" @default.
- W2134736922 modified "2023-10-18" @default.
- W2134736922 title "Reproductive isolation of two sympatric louseworts, Pedicularis rhinanthoides and Pedicularis longiflora (Orobanchaceae): how does the same pollinator type avoid interspecific pollen transfer?" @default.
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- W2134736922 doi "https://doi.org/10.1111/j.1095-8312.2007.00709.x" @default.
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