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Hypseocharis reveals early history of physical dormancy in Geraniaceae

Published online by Cambridge University Press:  23 December 2016

Filip Vandelook
Affiliation:
Botanic Garden Meise, Nieuwelaan 38, B-1860 Meise, Belgium
Ann Van de Vyver
Affiliation:
Botanic Garden Meise, Nieuwelaan 38, B-1860 Meise, Belgium
Edgar E. Gareca
Affiliation:
Centro de Biodiversidad y Genética, Universidad Mayor de San Simón, Casilla 538, Cochabamba, Bolivia
Corresponding

Abstract

Hypseocharis is a genus endemic to the high Andes and sister to all other Geraniaceae genera. Regarding its basal position in Geraniaceae evolution, its germination ecology can provide important insights into the early evolution of physical dormancy. Imbibition tests performed on seeds of two Hypseocharis populations from Bolivia indicate that their seeds indeed have physical dormancy like all other Geraniaceae. These results indicate that physical dormancy in Geraniaceae evolved during the Eocene before the uplift of the Andes mountains and before the events that led to the cross-Atlantic disjunct distribution of Geraniacae.

Type
Short Communication
Copyright
Copyright © Cambridge University Press 2016 

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Footnotes

† Present address: Carrera de Biología y Comité Académico Doctoral, Universidad Mayor Real y Pontificia de San Francisco Xavier de Chuquisaca, c. Aniceto Arce 46, Sucre, Bolivia.

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Hypseocharis reveals early history of physical dormancy in Geraniaceae
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