| Abstract Detail
Conference Wide Bohs, Lynn [1], Weese, Terri [1], Stern, Stephen [1], Myers, Nicole [1], Lefgren, Victoria [1]. Zygomorphy and heterandry in Solanum in a phylogenetic context. THE majority of species in the large genus Solanum (ca. 1500 species) have 5-merous, radially symmetrical flowers with equal stamens. However, some Solanum species and groups are characterized by 4-merous and/or zygomorphic flowers, unequal stamens, and enantiostyly (styles deflected to one side of the flower). Previous workers have examined flower and seed coat morphology in these unusual Solanum species as a guide to interpreting their evolutionary relationships. However, the phylogenetic position of the zygomorphic and heterandrous Solanums has not been examined using molecular data and cladistic methodology. Sequence data from both the chloroplast and nuclear genomes is used to infer the phylogenetic position of Solanum species and groups with variously modified flowers. Zygomorphy and heterandry have evolved multiple times within Solanum, particularly within the spiny Solanums (Solanum subgenus Leptostemonum). The phylogenies shed light on the disparate morphologies and geographical distributions encountered in the zygomorphic and heterandrous species and pinpoint the likely relatives of these taxa among the actinomorphic Solanum species with equal stamens.
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1 - University of Utah, Department of Biology, 257 South 1400 East, Salt Lake City, UT, 84112, USA
Keywords:
Solanum
zygomorphy
heterandry
phylogeny.
Session: Poster-79
Location: Ballroom CD/Monona Terrace
Date: Tuesday, July 25th, 2006
Time: 8:00 AM
Abstract ID:46 |
