Show simple item record

dc.contributor.authorde Boer, Hugo J
dc.contributor.authorSchaefer, Hanno
dc.contributor.authorThulin, Mats
dc.contributor.authorRenner, Susanne S
dc.date.accessioned2013-10-24T19:30:43Z
dc.date.issued2012
dc.identifier.citationde Boer, Hugo J., Hanno Schaefer, Mats Thulin, and Susanne S. Renner. 2012. Evolution and loss of long-fringed petals: A case study using a dated phylogeny of the snake gourds, Trichosanthes (Cucurbitaceae). BMC Evolutionary Biology 12:108.en_US
dc.identifier.issn1471-2148en_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:11210619
dc.description.abstractBackground: The Cucurbitaceae genus Trichosanthes comprises 90–100 species that occur from India to Japan and southeast to Australia and Fiji. Most species have large white or pale yellow petals with conspicuously fringed margins, the fringes sometimes several cm long. Pollination is usually by hawkmoths. Previous molecular data for a small number of species suggested that a monophyletic Trichosanthes might include the Asian genera Gymnopetalum (four species, lacking long petal fringes) and Hodgsonia (two species with petals fringed). Here we test these groups’ relationships using a species sampling of c. 60% and 4759 nucleotides of nuclear and plastid DNA. To infer the time and direction of the geographic expansion of the Trichosanthes clade we employ molecular clock dating and statistical biogeographic reconstruction, and we also address the gain or loss of petal fringes. Results: Trichosanthes is monophyletic as long as it includes Gymnopetalum, which itself is polyphyletic. The closest relative of Trichosanthes appears to be the sponge gourds, Luffa, while Hodgsonia is more distantly related. Of six morphology-based sections in Trichosanthes with more than one species, three are supported by the molecular results; two new sections appear warranted. Molecular dating and biogeographic analyses suggest an Oligocene origin of Trichosanthes in Eurasia or East Asia, followed by diversification and spread throughout the Malesian biogeographic region and into the Australian continent. Conclusions: Long-fringed corollas evolved independently in Hodgsonia and Trichosanthes, followed by two losses in the latter coincident with shifts to other pollinators but not with long-distance dispersal events. Together with the Caribbean Linnaeosicyos, the Madagascan Ampelosicyos and the tropical African Telfairia, these cucurbit lineages represent an ideal system for more detailed studies of the evolution and function of petal fringes in plant-pollinator mutualisms.en_US
dc.description.sponsorshipOrganismic and Evolutionary Biologyen_US
dc.language.isoen_USen_US
dc.publisherBioMed Centralen_US
dc.relation.isversionofdoi:10.1186/1471-2148-12-108en_US
dc.relation.hasversionhttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC3502538/pdf/en_US
dash.licenseLAA
dc.titleEvolution and Loss of Long-Fringed Petals: A Case Study Using a Dated Phylogeny of the Snake Gourds, Trichosanthes (Cucurbitaceae)en_US
dc.typeJournal Articleen_US
dc.description.versionVersion of Recorden_US
dc.relation.journalBMC Evolutionary Biologyen_US
dash.depositing.authorSchaefer, Hanno
dc.date.available2013-10-24T19:30:43Z
dc.identifier.doi10.1186/1471-2148-12-108*
dash.contributor.affiliatedSchaefer, Hanno


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record