Patrick von Aderkas, Massimo Nepi, Marlies Rise, Federico Buffi, Massimo Guarnieri, Andrea Coulter, Karen Gill, Patricia Lan, Sarah Rzemieniak, Ettore Pacini
Pollen of larch (Larix × marschlinsii) and Douglas-fir (Pseudotsuga menziesii) was used in homospecific and heterospecific crosses. Germination of heterospecific pollen in ovulo was reduced in post-pollination prefertilization drops. This provides evidence of selection against foreign pollen by open-pollinated exposed ovules in these two sister taxa, which share the same type of pollination mechanism. Of the other prezygotic stages in pollen-ovule interactions, uptake of pollen by stigmatic hairs did not show any selection...
September 2012: Sexual Plant Reproduction