Journal article
Pollen competition in hybridizing Cakile species: How does a latecomer win the race?
T Jalali, HS Rosinger, KA Hodgins, AJ Fournier-Level
American Journal of Botany | WILEY | Published : 2022
DOI: 10.1002/ajb2.16035
Abstract
Premise: Hybridization between cross-compatible species depends on the extent of competition between alternative mates. Even if stigmatic compatibility allows for hybridization, hybridization requires the heterospecific pollen to be competitive. Here, we determined whether conspecific pollen has an advantage in the race to fertilize ovules and the potential handicap to be overcome by heterospecific pollen in invasive Cakile species. Methods: We used fluorescence microscopy to measure pollen tube growth after conspecific and heterospecific hand-pollination treatments. We then determined siring success in the progeny relative to the timing of heterospecific pollen arrival on the stigma using C..
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Awarded by Australian Research Council
Funding Acknowledgements
The authors thank Roger Cousens and Jeffrey Karron for their feedback on earlier versions of this manuscript. We also thank Sascha Andrusiak and Rowan Berry, horticultural services officers at the University of Melbourne, Burnley Campus for their technical assistance. We also thank the American Journal of Botany reviewers and the Associate Editor, Joe Williams, for their helpful comments. This research was supported by an Australian Research Council Discovery Project (DP180102531) awarded to K.A.H. T.J. was supported by a Melbourne Research Scholarship and The Albert Shimmins Fund from the Faculty of Science, The University of Melbourne. Open access publishing facilitated by The University of Melbourne, as part of the Wiley - The University of Melbourne agreement via the Council of Australian University Librarians.