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dc.contributor.authorWen, Junen
dc.contributor.authorPlunkett, G. M.en
dc.contributor.authorMitchell, Anthony D.en
dc.contributor.authorWagstaff, S. J.en
dc.date.accessioned2008-08-25T05:19:20Z
dc.date.issued2001-01en
dc.identifier.citationWen, J., Plunkett, G. M., Mitchell, A. D., & Wagstaff, S. J. (2001). The evolution of Araliaceae: A phylogenetic analysis based on ITS sequences of nuclear ribosomal DNA. Systematic Botany, 26(1), 144-167.en
dc.identifier.issn0363-6445en
dc.identifier.urihttps://hdl.handle.net/10182/586
dc.description.abstractPhylogenetic analyses of ITS sequence data from 70 species and 40 genera of Araliaceae (representing all major lineages within the "core group" of the family) do not support the widely used traditional division of Araliaceae into three tribes. Tribe Aralieae (characterized by imbricate petals) is found nested within a paraphyletic Schefflerieae (whose taxa have valvate petals). There are, however, two large monophyletic groups comprising most araliad genera: the "Aralia-Polyscias-Pseudopanax group" (which includes Aralia, Meryta, Munroidendron, Panax, Pentapanax, Polyscias, Pseudopanax, Reynoldsia, Sciadodendron, Tetraplasandra, and their close allies), and the "Eleutherococcus-Dendropanax-Schefflera group" (including Brassaiopsis, Dendropanax, Eleutherococcus, Fatsia, Hedera, Oreopanax, Schefflera, Sinopanax, and their close allies). The ITS trees also permit a re-evaluation of several taxonomically important morphological characters (e.g., petal aestivation, leaf architecture, carpel number, and habit), and provide the opportunity to assess traditional generic delimitations in the family. Four of the largest genera appear to be either polyphyletic (Schefflera, Pseudopanax) or paraphyletic (Aralia, Polyscias), but further studies will be needed to fully re-define these complex taxa. Outgroup comparisons and the placement of Astrotricha and Osmoxylon (in basally-branching lineages in Araliaceae) help to confirm a paleotropical origin of the family. The ITS topologies suggest that biogeographic radiations into different tropical/subtropical regions and into the north and south temperate regions occurred early in the history of core Araliaceae. Temperate taxa have arisen several times independently from tropical and subtropical relatives, although a few subtropical taxa may be found nested within temperate clades (e.g., Pentapanax within Aralia). Migrations between the Old and New Worlds are also suggested for several taxa, including Aralia, Panax, Oplopanax, and the Sinopanax-Oreopanax generic pair.en
dc.format.extent144-167en
dc.language.isoenen
dc.publisherAmerican Society of Plant Taxonomistsen
dc.relationThe original publication is available from - American Society of Plant Taxonomistsen
dc.rights© Copyright 2001 by the American Society of Plant Taxonomistsen
dc.subjectAraliaceaeen
dc.subjectsystematicsen
dc.subjectinternal transcribed spacer sequencesen
dc.subjectphylogenyen
dc.subjectEvolutionary Biologyen
dc.titleThe evolution of Araliaceae : a phylogenetic analysis based on ITS sequences of nuclear ribosomal DNAen
dc.typeJournal Article
dc.subject.marsdenFields of Research::270000 Biological Sciences::270400 Botany::270401 Plant systematics, taxonomy and phylogenyen
lu.contributor.unitLincoln Universityen
lu.contributor.unitBio-Protection and Ecologyen
dc.subject.anzsrc0607 Plant Biologyen
dc.relation.isPartOfSystematic Botanyen
pubs.issue1en
pubs.organisational-group/LU
pubs.organisational-group/LU/BPEC
pubs.publication-statusPublisheden
pubs.volume26en


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