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The interrelationships of land plants and the nature of the ancestral embryophyte

2018-03Journal article Open Access
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dc.contributor.authorPuttick, Mark N.
dc.contributor.authorMorris, Jennifer L.
dc.contributor.authorWilliams, Tom A.
dc.contributor.authorCox, C. J.
dc.contributor.authorEdwards, Dianne
dc.contributor.authorKenrick, Paul
dc.contributor.authorPressel, Silvia
dc.contributor.authorWellman, Charles H.
dc.contributor.authorSchneider, Harald
dc.contributor.authorPisani, Davide
dc.contributor.authorDonoghue, Philip C. J.
dc.date.accessioned2018-12-07T14:53:37Z
dc.date.available2018-12-07T14:53:37Z
dc.date.issued2018-03
dc.description.abstractThe evolutionary emergence of land plant body plans transformed the planet. However, our understanding of this formative episode is mired in the uncertainty associated with the phylogenetic relationships among bryophytes (hornworts, liverworts, and mosses) and tracheophytes (vascular plants). Here we attempt to clarify this problem by analyzing a large transcriptomic dataset with models that allow for compositional heterogeneity between sites. Zygnematophyceae is resolved as sister to land plants, but we obtain several distinct relationships between bryophytes and tracheophytes. Concate-nated sequence analyses that can explicitly accommodate site-specific compositional heterogeneity give more support for a mosses-liverworts clade, "Setaphyta,'' as the sister to all other land plants, and weak support for hornworts as the sister to all other land plants. Bryophyte monophyly is supported by gene concatenation analyses using models explicitly accommodating lineage-specific compositional heterogeneity and analyses of gene trees. Both maximum-likelihood analyses that compare the fit of each gene tree to proposed species trees and Bayesian supertree estimation based on gene trees support bryophyte monophyly. Of the 15 distinct rooted relationships for embryophytes, we reject all but three hypotheses, which differ only in the position of hornworts. Our results imply that the ancestral embryophyte was more complex than has been envisaged based on topologies recognizing liverworts as the sister lineage to all other embryophytes. This requires many phenotypic character losses and transformations in the liverwort lineage, diminishes inconsistency between phylogeny and the fossil record, and prompts re-evaluation of the phylogenetic affinity of early land plant fossils, the majority of which are considered stem tracheophytes.
dc.description.sponsorshipUniversity of Bristol Advanced Computing Research Centre; University College London; NERC [NE/N002067/1]; Royal Society; Fundacao para a Ciencia e a Technologia (FCT), Portugal [PTDC/BIA-EVF/1499/2014]
dc.identifier.doi10.1016/j.cub.2018.01.063
dc.identifier.issn0960-9822
dc.identifier.issn1879-0445
dc.identifier.urihttp://hdl.handle.net/10400.1/11601
dc.language.isoeng
dc.peerreviewedyes
dc.publisherCell Press
dc.subjectPhylogenetic Tree Selection
dc.subjectChloroplast Genome Sequence
dc.subjectClosest Living Relatives
dc.subjectRibosomal-Rna Sequences
dc.subjectCompositional Heterogeneity
dc.subjectGreen Plants
dc.subjectBryological Perspective
dc.subjectStreptophyte Algae
dc.subjectCladistic-Analysis
dc.subjectVascular Plants
dc.titleThe interrelationships of land plants and the nature of the ancestral embryophyte
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage+
oaire.citation.issue5
oaire.citation.startPage733
oaire.citation.titleCurrent Biology
oaire.citation.volume28
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.rightsopenAccess
rcaap.typearticle
relation.isAuthorOfPublication82c3689c-60b6-440d-9d7b-49e6dbd6861b
relation.isAuthorOfPublication.latestForDiscovery82c3689c-60b6-440d-9d7b-49e6dbd6861b

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