1887

Abstract

Two Gram-negative, cold-adapted, aerobic bacteria, designated strains M8 and M6, were isolated from soil collected from the South Shetland Islands. The organisms were rod-shaped, catalase- and oxidase-positive and motile by means of polar flagella. These two psychrotolerant strains grew between −4 and 30 °C. 16S rRNA gene sequence analysis placed strains M8 and M6 within the genus . DNA–DNA hybridization experiments between the Antarctic isolate M8 and type strains of phylogenetically related species, namely and , revealed levels of relatedness of 33 and 37 %, respectively. Strain M6 showed 99 % DNA similarity to strain M8. Several phenotypic characteristics, together with data on cellular fatty acid composition, served to differentiate strains M8 and M6 from related pseudomonads. On the basis of the polyphasic taxonomic evidence presented in this study, it can be concluded that strains M8 and M6 belong to the same genospecies, representing a novel species of the genus , for which the name sp. nov. is proposed. The type strain is M8 (=LMG 24016=CECT 7231).

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2007-11-01
2024-03-28
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