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Potential contribution to the invasion process of different reproductive strategies of two invasive roses

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Abstract

The type of reproductive system may be an important trait for the establishment and maintenance of populations of invasive plant species in new areas, as it can influence their demography and genetics. We studied the breeding system of two exotic invasive species, Rosa rubiginosa and R. canina, in a natural reserve in Argentina, using a combination of pollination experiments. We asked how the different reproductive modes of these species affect the quantity and quality of the fruits and seed produced. Our results show that both invasive rose species have an array of reproductive strategies, and that they are able to invade without pollinators, as they can produce seeds in the same quantity and quality through wind-pollination, self-pollination, and apomixis. Such lack of dependence on pollinators and pollination for reproduction should enhance colonization into new areas, suggesting the need of intensive monitoring of spread and dispersal. Considering that both species are successful invaders in the region, our results are in line with Baker’s rule, which posits that plants capable of uniparental reproduction are more likely to invade new areas.

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Acknowledgements

We thank the administration of Villavicencio Natural Reserve for permission to conduct this study, Hugo Debandi for his help during field work and two anonymous reviewers who help to improve the manuscript. ACM is a doctoral fellow, HJM a postdoctoral fellow and DPV a career researcher with CONICET. Research was funded through a grant from Fondo para la Investigación Científica y Tecnológica (FONCYT; PICT-2010-2779).

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Correspondence to Ana Clara Mazzolari.

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Mazzolari, A.C., Marrero, H.J. & Vázquez, D.P. Potential contribution to the invasion process of different reproductive strategies of two invasive roses. Biol Invasions 19, 615–623 (2017). https://doi.org/10.1007/s10530-016-1315-y

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  • DOI: https://doi.org/10.1007/s10530-016-1315-y

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