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Newly resolved relationships in an early land plant lineage: Bryophyta class Sphagnopsida (peat mosses).

dc.contributor.author Shaw, A Jonathan
dc.contributor.author Cox, Cymon J
dc.contributor.author Buck, William R
dc.contributor.author Devos, Nicolas
dc.contributor.author Buchanan, Alex M
dc.contributor.author Cave, Lynette
dc.contributor.author Seppelt, Rodney
dc.contributor.author Shaw, Blanka
dc.contributor.author Larraín, Juan
dc.contributor.author Andrus, Richard
dc.contributor.author Greilhuber, Johann
dc.contributor.author Temsch, Eva M
dc.coverage.spatial United States
dc.date.accessioned 2011-06-21T17:27:36Z
dc.date.issued 2010-09
dc.identifier http://www.ncbi.nlm.nih.gov/pubmed/21616905
dc.identifier ajb.1000055
dc.identifier.issn 0002-9122
dc.identifier.uri https://hdl.handle.net/10161/4194
dc.description.abstract UNLABELLED: PREMISE OF THE STUDY: The Sphagnopsida, an early-diverging lineage of mosses (phylum Bryophyta), are morphologically and ecologically unique and have profound impacts on global climate. The Sphagnopsida are currently classified in two genera, Sphagnum (peat mosses) with some 350-500 species and Ambuchanania with one species. An analysis of phylogenetic relationships among species and genera in the Sphagnopsida were conducted to resolve major lineages and relationships among species within the Sphagnopsida. • METHODS: Phylogenetic analyses of nucleotide sequences from the nuclear, plastid, and mitochondrial genomes (11 704 nucleotides total) were conducted and analyzed using maximum likelihood and Bayesian inference employing seven different substitution models of varying complexity. • KEY RESULTS: Phylogenetic analyses resolved three lineages within the Sphagnopsida: (1) Sphagnum sericeum, (2) S. inretortum plus Ambuchanania leucobryoides, and (3) all remaining species of Sphagnum. Sister group relationships among these three clades could not be resolved, but the phylogenetic results indicate that the highly divergent morphology of A. leucobryoides is derived within the Sphagnopsida rather than plesiomorphic. A new classification is proposed for class Sphagnopsida, with one order (Sphagnales), three families, and four genera. • CONCLUSIONS: The Sphagnopsida are an old lineage within the phylum Bryophyta, but the extant species of Sphagnum represent a relatively recent radiation. It is likely that additional species critical to understanding the evolution of peat mosses await discovery, especially in the southern hemisphere.
dc.language eng
dc.language.iso en_US
dc.publisher Wiley
dc.relation.ispartof Am J Bot
dc.relation.isversionof 10.3732/ajb.1000055
dc.title Newly resolved relationships in an early land plant lineage: Bryophyta class Sphagnopsida (peat mosses).
dc.title.alternative
dc.type Journal article
duke.contributor.id Shaw, A Jonathan|0136687
dc.description.version Version of Record
duke.date.pubdate 2010-9-0
duke.description.issue 9
duke.description.volume 97
dc.relation.journal American Journal of Botany
pubs.author-url http://www.ncbi.nlm.nih.gov/pubmed/21616905
pubs.begin-page 1511
pubs.end-page 1531
pubs.issue 9
pubs.organisational-group Biology
pubs.organisational-group Duke
pubs.organisational-group Trinity College of Arts & Sciences
pubs.publication-status Published
pubs.volume 97


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