Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1991-4-15
pubmed:databankReference
pubmed:abstractText
In order to study the origin of metazoans, we have compared sequences from the 5' end of the large subunit ribosomal RNA of a number of protists, fungi, plants and metazoans, including all diploblastic phyla (sequences of 10 new species have been determined, including that of the placozoan, Trichoplax adhaerens). These sequences were analyzed using distance matrix, maximum parsimony and maximum likelihood methods, and the validity of the results was ascertained with bootstrapping and species removal or addition. Triploblasts and diploblasts formed two clearly separated monophyletic units; this divergence, which apparently preceded the diversification of diploblastic animals (i.e. the successive sponge, ctenophore, cnidarian radiations), showed a much more ancient origin of triploblasts with respect to diploblasts than classically assumed. These results do not exclude the possibility that triploblasts and diploblasts arose independently from different protists.
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/2001670-17747916, http://linkedlifedata.com/resource/pubmed/commentcorrection/2001670-17778294, http://linkedlifedata.com/resource/pubmed/commentcorrection/2001670-2300560, http://linkedlifedata.com/resource/pubmed/commentcorrection/2001670-2419907, http://linkedlifedata.com/resource/pubmed/commentcorrection/2001670-2469937, http://linkedlifedata.com/resource/pubmed/commentcorrection/2001670-2716835, http://linkedlifedata.com/resource/pubmed/commentcorrection/2001670-2832694, http://linkedlifedata.com/resource/pubmed/commentcorrection/2001670-3071258, http://linkedlifedata.com/resource/pubmed/commentcorrection/2001670-3148731, http://linkedlifedata.com/resource/pubmed/commentcorrection/2001670-3277277, http://linkedlifedata.com/resource/pubmed/commentcorrection/2001670-3368456, http://linkedlifedata.com/resource/pubmed/commentcorrection/2001670-418827, http://linkedlifedata.com/resource/pubmed/commentcorrection/2001670-6193488, http://linkedlifedata.com/resource/pubmed/commentcorrection/2001670-7463489
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0261-4189
pubmed:author
pubmed:issnType
Print
pubmed:volume
10
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
499-503
pubmed:dateRevised
2010-9-9
pubmed:meshHeading
pubmed:year
1991
pubmed:articleTitle
An analysis of the origin of metazoans, using comparisons of partial sequences of the 28S RNA, reveals an early emergence of triploblasts.
pubmed:affiliation
URA 671 CNRS, Station Zoologique, Villefranche sur mer, France.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't