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Organellar phylogenomics of an emerging model system: Sphagnum (peatmoss)

dc.contributor.authorShaw, A. Jonathan
dc.contributor.authorDevos, Nicolas
dc.contributor.authorLiu, Yang
dc.contributor.authorCox, C. J.
dc.contributor.authorGoffinet, B.
dc.contributor.authorFlatberg, Kjell Ivar
dc.contributor.authorShaw, Blanka
dc.date.accessioned2017-04-07T15:56:15Z
dc.date.available2017-04-07T15:56:15Z
dc.date.issued2016-08
dc.description.abstractBackground and Aims Sphagnum-dominated peatlands contain approx. 30 % of the terrestrial carbon pool in the form of partially decomposed plant material (peat), and, as a consequence, Sphagnum is currently a focus of studies on biogeochemistry and control of global climate. Sphagnum species differ in ecologically important traits that scale up to impact ecosystem function, and sequencing of the genome from selected Sphagnum species is currently under-way. As an emerging model system, these resources for Sphagnum will facilitate linking nucleotide variation to plant functional traits, and through those traits to ecosystem processes. A solid phylogenetic framework for Sphagnum is crucial to comparative analyses of species-specific traits, but relationships among major clades within Sphagnum have been recalcitrant to resolution because the genus underwent a rapid radiation. Herein a well-supported hypothesis for phylogenetic relationships among major clades within Sphagnum based on organellar genome sequences (plastid, mitochondrial) is provided.Methods We obtained nucleotide sequences (273 753 nucleotides in total) from the two organellar genomes from 38 species (including three outgroups). Phylogenetic analyses were conducted using a variety of methods applied to nucleotide and amino acid sequences. The Sphagnum phylogeny was rooted with sequences from the related Sphagnopsida genera, Eosphagnum and Flatbergium.Key Results Phylogenetic analyses of the data converge on the following subgeneric relationships: (Rigida (((Subsecunda) (Cuspidata)) ((Sphagnum) (Acutifolia))). All relationships were strongly supported. Species in the two major clades (i.e. Subsecunda + Cuspidata and Sphagnum + Acutifolia), which include > 90 % of all Sphagnum species, differ in ecological niches and these differences correlate with other functional traits that impact biogeochemical cycling. Mitochondrial intron presence/absence are variable among species and genera of the Sphagnopsida. Two new nomenclatural combinations are made, in the genera Eosphagnum and Flatbergium.Conclusions Newly resolved relationships now permit phylogenetic analyses of morphological, biochemical and ecological traits among Sphagnum species. The results clarify long-standing disagreements about subgeneric relationships and intrageneric classification.
dc.description.sponsorshipGrant no. DEB-0918998; Grant no. DEB-1240045
dc.identifier.doi10.1093/aob/mcw086
dc.identifier.issn0305-7364
dc.identifier.urihttp://hdl.handle.net/10400.1/9362
dc.language.isoeng
dc.peerreviewedyes
dc.relation.isbasedonWOS:000383179200006
dc.titleOrganellar phylogenomics of an emerging model system: Sphagnum (peatmoss)
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage196
oaire.citation.issue2
oaire.citation.startPage185
oaire.citation.titleAnnals of Botany
oaire.citation.volume118
person.familyNameCox
person.givenNameCymon
person.identifier.ciencia-id6B15-9771-1D04
person.identifier.orcid0000-0002-4927-979X
person.identifier.ridD-1303-2012
person.identifier.scopus-author-id7402112716
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublication82c3689c-60b6-440d-9d7b-49e6dbd6861b
relation.isAuthorOfPublication.latestForDiscovery82c3689c-60b6-440d-9d7b-49e6dbd6861b

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