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Abstract

A red-pigmented, non-motile, Gram-stain-negative, rod-shaped bacterium, strain R2-28, was isolated from a soil sample collected from Ardley Island, South Shetland Islands, Antarctica, and was characterized taxonomically by using a polyphasic approach. The organism grew optimally at 18 °C in TSB. On the basis of phylogenetic analyses of the 16S rRNA gene sequence, strain R2-28 was most closely related to the genus of the family . The highest levels of 16S rRNA gene sequence similarity were found with respect to NWER-II11 (95.6 %) and DS-57 (95.2 %). The DNA G+C content was 39.9 mol%, and MK-7 was the only respiratory quinone. The major polar lipids were phosphatidylethanolamine and a sphingolipid. The predominant cellular fatty acids were iso-C, anteiso-C, iso-C 3-OH and summed feature 3 (comprising Cω7 and/or Cω6). These chemotaxonomic and phylogenetic data supported the allocation of strain R2-28 to the genus . Additionally, the results of physiological and biochemical tests allowed phenotypic differentiation of strain R2-28 from species of the genus with validly published names. Therefore, strain R2-28 represents a novel species within the genus , for which the name sp. nov. is proposed. The type strain is R2-28 ( = CCTCC AB 2013365 = LMG 28255).

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2015-11-01
2021-02-28
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