Clark, John L. , Coleman, Cassandra , Clavijo, Laura , Mora, Marcela , Muchhala, Nathan .
Evolution of anti-bee pollination mechanisms in the Neotropical plant genus Drymonia (Gesneriaceae).
The Neotropical plant genus Drymonia is exemplified by a remarkable diversity of flower shapes and colors. The classification of Drymonia and closely related genera is still in flux because of the convergence of floral forms. Data from pollen presentation, videography, and molecular-based phylogenetic analyses suggest that multiple shifts from bee to bird pollination have occurred. Two distinctive corolla forms associated with bird pollination have multiple independent origins in Drymonia:laterally compressed corollas and hypocyrtoid ('pouched') corollas. Species of Drymonia with either of these corolla shapes occasionally retain features of euglossine bee pollination such as poricidal anther dehiscence. Our data suggests that shifts to bird pollination in Drymonia area ccompanied with the evolution of 'anti-bee' mechanisms, such as narrow flower openings and red coloration, that serve to reduce visits by euglossine bees.
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1 - The University of Alabama, Department of Biological Sciences, Box 870345, Tuscaloosa, AL, 35487, USA
2 - University of Nebraska Lincoln
Presentation Type: Oral Paper:Papers for Topics
Location: Waterman Room/Chase Park Plaza
Date: Monday, July 11th, 2011
Time: 4:30 PM