Echinoderm conundrums: Hox genes, heterochrony, and an excess of mouths

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dc.contributor.authorLacalli, Thurston
dc.date.accessioned2015-05-04T21:12:05Z
dc.date.available2015-05-04T21:12:05Z
dc.date.copyright2014en_US
dc.date.issued2014-12-22
dc.descriptionBioMed Centralen_US
dc.description.abstractTwo issues relating to the translocation of anterior Hox genes in echinoderms to the 5’ end of the Hox cluster are discussed: i) that developmental changes associated with fixation to the substratum have led to an acceleration of mesodermal development relative to that of ectoderm, resulting in a mismatch of anteroposterior registry between the two tissues and a larger role for mesoderm in patterning control, and ii) whether this helps explain the ability of some echinoderms to form separate mouths at different locations, one for the larva and one for the juvenile rudiment. Freeing the mesoderm from ectodermal influences may have encouraged morphogenetic innovation, paralleling the situation in tunicates, where an early genomic (or genomic and developmental) change has allowed the body to evolve in novel ways.en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipFunding to support this work was received from NSERC Canada and the L. G. Harrison Research Trust.en_US
dc.identifier.citationLacalli: Echinoderm conundrums: Hox genes, heterochrony, and an excess of mouths. EvoDevo 2014 5:46en_US
dc.identifier.urihttp://www.evodevojournal.com/content/5/1/46
dc.identifier.urihttp://dx.doi.org/10.1186/2041-9139-5-46
dc.identifier.urihttp://hdl.handle.net/1828/6131
dc.language.isoenen_US
dc.publisherEvoDevoen_US
dc.rightsAttribution-NonCommercial-NoDerivs 2.5 Canada*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/2.5/ca/*
dc.subjectBody plan
dc.subjectEchinoderms
dc.subjectHeterochrony
dc.subjectHox genes
dc.subjectHydrocoel
dc.subject.departmentDepartment of Biology
dc.titleEchinoderm conundrums: Hox genes, heterochrony, and an excess of mouthsen_US
dc.typeArticleen_US

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