A phylogeny and study of floral traits in the neotropical genus Gasteranthus (Gesneriaceae)

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dc.contributor Harris, Phillip M.
dc.contributor Earley, Ryan L.
dc.contributor Muchhala, Nathan
dc.contributor.advisor Clark, John L.
dc.contributor.author Coleman, Cassandra Lynn
dc.date.accessioned 2017-03-01T16:34:36Z
dc.date.available 2017-03-01T16:34:36Z
dc.date.issued 2012
dc.identifier.other u0015_0000001_0001030
dc.identifier.other Coleman_alatus_0004M_11241
dc.identifier.uri https://ir.ua.edu/handle/123456789/1513
dc.description Electronic Thesis or Dissertation
dc.description.abstract The genus Gasteranthus (Gesneriaceae), with 41 currently described species, including 3 subspecies, occurs in Central and South America. This genus has a center of diversity in Ecuador and is comprised of herbs or subshrubs that grow predominately in humid to wet tropical forests and is especially abundant near streams and waterfalls. Species of Gasteranthus have two morphologically different corolla shapes. The hypocyrtoid (pouched) shape is defined by an inflated ventral pouch and constricted throat while the campanulate (non-pouched) shape is defined by a funnelform corolla. Molecular sequence data generated from nrDNA (ITS and ETS) and cpDNA (matKR and trnL-F) were generated for 57 taxa representing 32 species of Gasteranthus and 25 species from closely related genera. This study strongly supports that shifts between campanulate and hypocyrtoid flowers have occurred several times within Gasteranthus, though the result is equivocal as to which floral form is plesiomorphic. Phylogenetic analyses support that Gasteranthus dressleri should be transferred to Cremosperma and given a new combination. Phylogenetic results and fieldwork have shown that new circumscriptions are necessary for names previously synonymized in Gasteranthus pansamalanus and Gasteranthus lateralis. Finally, Gasteranthus aurantiacus is recognized as a synonym of Gasteranthus mutabilis.
dc.format.extent 52 p.
dc.format.medium electronic
dc.format.mimetype application/pdf
dc.language English
dc.language.iso en_US
dc.publisher University of Alabama Libraries
dc.relation.ispartof The University of Alabama Electronic Theses and Dissertations
dc.relation.ispartof The University of Alabama Libraries Digital Collections
dc.relation.hasversion born digital
dc.rights All rights reserved by the author unless otherwise indicated.
dc.subject.other Systematic biology
dc.subject.other Biology
dc.title A phylogeny and study of floral traits in the neotropical genus Gasteranthus (Gesneriaceae)
dc.type thesis
dc.type text
etdms.degree.department University of Alabama. Dept. of Biological Sciences
etdms.degree.discipline Biological Sciences
etdms.degree.grantor The University of Alabama
etdms.degree.level master's
etdms.degree.name M.S.

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