Journal
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
Volume 51, Issue -, Pages 1773-1782Publisher
SOC GENERAL MICROBIOLOGY
DOI: 10.1099/00207713-51-5-1773
Keywords
Ralstonia; metal-resistance; taxonomy; industrial biotopes
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Thirty-one heavy-metal-resistant bacteria isolated from industrial biotopes were subjected to polyphasic characterization, including 16S rDNA sequence analysis, DNA-DNA hybridizations, biochemical tests, whole-cell protein and fatty-acid analyses. All strains were shown to belong to the Ralstonia branch of the fi-Proteobacteria. Whole-cell protein profiles and DNA-DNA hybridizations revealed two clearly distinct groups, showing low similarity to known Ralstonia species. These two groups, of 8 and 17 isolates, were assigned to two new species, for which the names Ralstonia campinensis sp. nov. and Ralstonia metallidurans sp. nov. are proposed. The type strains are WS2(T) (= LMG 19282(T) = CCUG 44526(T)) and CH34(T) (= LMG 1195(T) = DSM 2839(T)), respectively. Six isolates were allocated to Ralstonia basilensis, which presently contains only the type strain; an emendation of the latter species description is therefore proposed.
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