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Article Dans Une Revue Archives of Microbiology Année : 2012

Characterization of Deinococcus sahariens sp nov., a radiation-resistant bacterium isolated from a Saharan hot spring

Résumé

An ultraviolet-radiation-resistant, Gram-positive, orange-pigmented, thermophilic and strictly aerobic cocci was isolated from Saharan water hot spring in Tunisia. The newly isolated bacterium, designated HAN-23(T), was identified based on polyphasic taxonomy including genotypic, phenotypic and chemotaxonomic characterization. Phylogenetic analysis based on 16S rRNA gene sequences placed this strain within Deinococcus genus. However, strain HAN-23(T) is different from recognized species of the genus Deinococcus, showing less than 94.0% similarity values to its closest relatives. The predominant cellular fatty acids determined by gas chromatography were iso-C-15:0, iso-C-17:0 and iso C-17:1 omega 9c. The major respiratory quinone was MK-8. The DNA G + C content was 66.9 mol%. DNA-DNA hybridization measurements revealed low DNA relatedness (6%) between the novel isolate and its closest neighbor, the type strain Deinococcus geothermalis DSM 11300. On the basis of the phenotypic, chemotaxonomic and phylogenetic data, strain HAN-23(T) represents a novel species of the genus Deinococcus, for which the name Deinococcus sahariens sp. nov. is proposed, the type strain being HAN-23(T) (=DSM 18496(T); LMG 23756(T)).

Dates et versions

hal-01268345 , version 1 (04-02-2016)

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Hanene Bouraoui, Melek Ben Aissa, Feten Abbassi, Jean-Pierre Touzel, Michael O'Donohue, et al.. Characterization of Deinococcus sahariens sp nov., a radiation-resistant bacterium isolated from a Saharan hot spring. Archives of Microbiology, 2012, 194 (5), pp.315 - 322. ⟨10.1007/s00203-011-0762-1⟩. ⟨hal-01268345⟩
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