Linked Life Data

17952491

Source:http://linkedlifedata.com/resource/pubmed/id/17952491

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2008-6-4
pubmed:databankReference
pubmed:abstractText
The spatio-temporal distribution of sulfate-reducing bacteria (SRB) in the microbial mat of Camargue (Salins-de-Giraud, France) was investigated by molecular approaches at both microscale spatial resolution and different taxonomic organization levels. The vertical distribution of the SRB populations was correlated with oxygen and sulfide microgradient fluctuations. Comparisons of Terminal restriction fragment length polymorphism (T-RFLP) fingerprints showed distinct locations of some operational taxonomic units at daytime and at night (4:00 or 15:00 hours) revealing important differences on the structures of the bacterial communities. When oxygen penetrates the mat, SRB migration was observed either downward to reach deeper anoxic zones to escape oxygen or upward to reach oxic surface zones. When no migration was observed, both metabolism switches and aggregate formations were suspected. These behaviors allowed the aerotolerant SRB to deal with oxygen. The analysis of the Desulfococcus-Desulfonema-Desulfosarcina T-RFLP profiles revealed up-migrating populations related to both Desulfonema sp. and Desulfosarcina variabilis. T-RFLP profiles combined with 16S ribosomal ribonucleic acid gene library analysis of the Desulfobacter group revealed two distinct populations: a population related to the recently described Desulfotignum genus migrating upward during the night and a population of a new species of the Desulfobacter uniformly located throughout the mat independent of the period. Thus, the identification of the new oxygen-tolerant SRB will provide the basis for understanding the physiological adaptations to oxygen.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0095-3628
pubmed:author
pubmed:issnType
Print
pubmed:volume
56
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
90-100
pubmed:meshHeading
pubmed:year
2008
pubmed:articleTitle
Molecular analysis of the spatio-temporal distribution of sulfate-reducing bacteria (SRB) in Camargue (France) hypersaline microbial mat.
pubmed:affiliation
Laboratoire de Génomique des Archaea, Institut de Génétique et Microbiologie, UMR CNRS 8621, Université Paris Sud XI, Bât 400, 91405 Orsay Cedex, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't