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Post-pollination processes governing mating patterns in Trillium, a well-known genus of insect-pollinated woodland herbs, are poorly understood. Mechanisms influencing outcrossing were investigated in T. grandiflorum and T. erectum, two widespread species native to eastern North America. In southern Ontario, Canada, the two species are often sympatric; they flower in early May, and are pollinated...
Saururus cernuus, a species belonging to the primitive herbaceous angiosperm family Saururaceae, exhibits high rates of self-sterility. We investigated the structural and functional aspects of pollen-carpel interactions following cross and self pollination to assess the tissue specific site and timing of self-sterility and factors important for successful cross pollen tube growth. Self-sterility was...
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