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- Title
Biogeographical history and diversification of Petunia and Calibrachoa ( Solanaceae) in the Neotropical Pampas grassland.
- Authors
Fregonezi, Jeferson N.; Turchetto, Caroline; Bonatto, Sandro L.; Freitas, Loreta B.
- Abstract
The Pampas in the southern Neotropics is a vast region with vegetation composed mainly of grasses, and it may be the least-studied ecosystem in southern South America. Contrary to what was thought until recently, this region is heterogeneous and harbours rich biodiversity and many endemic species; however, little is known about the current geographical distribution and evolution of its plants. Here, we present results from phylogeographical studies on two genera typical of open environments ( Petunia and Calibrachoa) that occur in both the Pampas and the high-altitude grasslands of southern Brazil. The rapid radiations of Petunia and Calibrachoa are examples of how strong selective pressures for different pollinators, coupled with adaptation to edaphic and climatic differences, may drive the diversification of plants in the Pampas. We also discuss factors that could have affected and driven the diversification and speciation of plants in this environment. Further studies, including some focusing on other taxa, are required to characterize the diversification of plant species in this region more accurately. © 2012 The Linnean Society of London, Botanical Journal of the Linnean Society, 2012, ••, ••-••.
- Subjects
PHYLOGEOGRAPHY; PETUNIAS; SOLANACEAE; PAMPAS grasses; GRASSLANDS; PLANT communities; POLLINATORS
- Publication
Botanical Journal of the Linnean Society, 2013, Vol 171, Issue 1, p140
- ISSN
0024-4074
- Publication type
Article
- DOI
10.1111/j.1095-8339.2012.01292.x