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Leaf shape evolution in the South African genus Pelargonium L' Hér. (Geraniaceae)

Jones, C.S.; Bakker, Freek T.; Schlichting, Carl; Nicotra, Adrienne

Description

Leaf shapes reflect complex assemblages of shape-determining elements, yet evolutionary studies tend to treat leaf shape as a single attribute, for example cordate or linear. As with all complex structures, individual elements of a leaf could theoretically evolve independently and at different rates to the extent permitted by genetic and functional limitations. We examined relative evolutionary lability of shape-determining elements in the highly diverse South African plant genus Pelargonium...[Show more]

dc.contributor.authorJones, C.S.
dc.contributor.authorBakker, Freek T.
dc.contributor.authorSchlichting, Carl
dc.contributor.authorNicotra, Adrienne
dc.date.accessioned2015-12-10T22:40:34Z
dc.identifier.issn0014-3820
dc.identifier.urihttp://hdl.handle.net/1885/57509
dc.description.abstractLeaf shapes reflect complex assemblages of shape-determining elements, yet evolutionary studies tend to treat leaf shape as a single attribute, for example cordate or linear. As with all complex structures, individual elements of a leaf could theoretically evolve independently and at different rates to the extent permitted by genetic and functional limitations. We examined relative evolutionary lability of shape-determining elements in the highly diverse South African plant genus Pelargonium (Geraniaceae). We used SIMMAP to calculate Bayesian posterior probabilities for ancestral states of leaf-shape characters for major nodes across multiple phylogenetic trees. Trees were derived from a Bayesian analysis of DNA sequence data from four partitions. We found that shape elements differed in rates of character-state transformations across the tree. Leaf base, apex, and overall outline had low rates. Transformations in venation occurred at slightly higher rates and were associated with shifts in venation among major clades. Leaf margin type and overall leaf size showed intermediate rates, whereas high rates were observed in the extent of lamina lobing and functional leaf size. The results indicate that suites of elements characteristic of the recently evolved xerophytic lineage, for example pinnate venation, dissected lamina, and entire margins, were acquired piecemeal over nested levels of the phylogeny.
dc.publisherSociety for the Study of Evolution
dc.sourceEvolution
dc.subjectKeywords: Bayesian analysis; DNA; evolution; evolutionary biology; gene; leaf morphology; phylogenetics; plant; article; Bayes theorem; evolution; genetics; histology; Pelargonium; phylogeny; plant leaf; Bayes Theorem; Evolution; Pelargonium; Phylogeny; Plant Leave Ancestral character-state reconstruction; Functional leaf size; Leaf evolution; Leaf venation; Xerophytic plants
dc.titleLeaf shape evolution in the South African genus Pelargonium L' Hér. (Geraniaceae)
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume63
dc.date.issued2009
local.identifier.absfor060399 - Evolutionary Biology not elsewhere classified
local.identifier.ariespublicationu9511635xPUB403
local.type.statusPublished Version
local.contributor.affiliationJones, C.S., University of Connecticut
local.contributor.affiliationBakker, Freek T., National Herbarium Nederland
local.contributor.affiliationSchlichting, Carl, University of Connecticut
local.contributor.affiliationNicotra, Adrienne, College of Medicine, Biology and Environment, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.issue2
local.bibliographicCitation.startpage479
local.bibliographicCitation.lastpage497
local.identifier.doi10.1111/j.1558-5646.2008.00552.x
dc.date.updated2016-02-24T12:04:58Z
local.identifier.scopusID2-s2.0-58949087709
local.identifier.thomsonID000263254000015
CollectionsANU Research Publications

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