Aureimonas glaciistagni sp. nov., isolated from a melt pond on Arctic sea ice

Abstract

A Gram-staining-negative, motile, aerobic and rod-shaped bacterial strain, PAMC 27157^T, was isolated from a melt pond on sea ice in the Chukchi Sea. Phylogenetic analysis of the 16S rRNA gene sequence of strain PAMC 27157^T revealed an affiliation to the genus Aureimonas with the closest sequence similarity (96.2 %) to that of Aureimonas phyllosphaerae. Strain PAMC 27157^T grew optimally at 30°C and pH 7.0 in the presence of 3.5 % (w/v) NaCl. The major polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine,phosphatidylcholine, phosphatidylmonomethylethanolamine, sulfoquinovosyldiacylglycerol and an unidentified aminolipid. The major cellular fatty acid was summed feature 8 (C₁₈ : ₁ω7c and/or C₁₈ : ₁ω6c, 83.1 %) and the major respiratory quinone was Q-10. The genomic DNA G+C content was 69.1 mol%. The combined phylogenetic, phenotypic and chemotaxonomic data showed that strain PAMC 27157^T could be clearly distinguished from species of the genus Aureimonas with validly published names. Thus, strain PAMC 27157^T should be classified as representing a novel species in the genus Aureimonas, for which the name Aureimonas glaciistagni sp. nov. is proposed. The type strain is PAMC 27157^T (=KCCM 43049^T =JCM 30183^T).