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LiteratureArticle Details
PMID: 17715057
Published · ppublish
English
Journal Article
Research Support, Non-U.S. Gov't
Searching for species in haloarchaea.
Proceedings of the National Academy of Sciences of the United States of America
·Vol. 104
·No. 35
·2007-08-28
·Pages 14092-7
Abstract
Prokaryotic (bacterial and archaeal) species definitions and the biological concepts that underpin them entail clustering (cohesion) among individuals, in terms of genome content and gene sequence similarity. Homologous recombination can maintain gene sequence similarity within, while permitting divergence between, clusters and is thus the basis for recent efforts to apply the Biological Species Concept in prokaryote systematics and ecology. In this study, we examine isolates of the haloarchaeal genus Halorubrum from two adjacent ponds of different salinities at a Spanish saltern and a natural saline lake in Algeria by using multilocus sequence analysis. We show that, although clusters can be defined by concatenation of multiple marker sequences, barriers to exchange between them are leaky. We suggest that no nonarbitrary way to circumscribe "species" is likely to emerge for this group, or by extension, to apply generally across prokaryotes. Arbitrary criteria might have limited practical use, but still must be agreed upon by the community.
MeSH Terms
Euryarchaeota/classification,genetics
Fresh Water/microbiology
Genes, Bacterial
Genome, Archaeal
Genome, Bacterial
Molecular Sequence Data
Phylogeny
Recombination, Genetic
Seawater/microbiology
Water Microbiology
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Article Info
Journal
Proceedings of the National Academy of Sciences of the United States of America
Abbr.
Proc Natl Acad Sci U S A
ISSN
0027-8424
Published
2007-08-28
Epub
2007-00-21
Pages
14092-7
Language
English
Region
United States
NLM ID
7505876
PMCID
PMC1955782
Subset
IM
Databases
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