Linked Life Data

20430071

Source:http://linkedlifedata.com/resource/pubmed/id/20430071

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
2011-3-28
pubmed:abstractText
The study of hair cells in invertebrates is important, because it can shed light on the debated question about the evolutionary origin of vertebrate hair cells. Here, we review the morphology and significance of hair cells in two groups of invertebrates, the lower chordates (tunicates and cephalochordates) and the molluscs. These taxa possess complex mechanoreceptor organs based on both primary (sensory neurons) and/or secondary, axonless, sensory cells, bearing various apical specializations. Compared with vertebrates, these taxa show interesting examples of convergent evolution and possible homologies of sensory systems. For example, the "lateral line organ" of Octopoda and Decapoda, composed of primary sensory cells aligned on the arms and the head, is considered a classic example of convergent evolution to mechanoreception. Similarly, in ascidians, the cupular organ, formed of primary sensory cells embedded in a gelatinous cupula, is seen as an analog of neuromasts in vertebrates. However, the coronal organ of the oral siphon of ascidians, represented by a line of secondary sensory cells with a hair bundle also comprising graded stereovilli, is currently the best candidate for tracing the evolutionary origin of the vertebrate octavo-lateralis system. Several features, such as embryological origin, position, gene expression and morphology, support this hypothesis.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
1878-5891
pubmed:author
pubmed:copyrightInfo
Copyright © 2010 Elsevier B.V. All rights reserved.
pubmed:issnType
Electronic
pubmed:volume
273
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
14-24
pubmed:meshHeading
pubmed:year
2011
pubmed:articleTitle
Hair cells in non-vertebrate models: lower chordates and molluscs.
pubmed:affiliation
Department of Biology, University of Padova, Via U. Bassi 58/B, 35131 Padova, Italy. paolo.burighel@unipd.it
pubmed:publicationType
Journal Article, Comparative Study, Review, Research Support, Non-U.S. Gov't