Salinimicrobium sediminis sp. nov., isolated from a deep-sea sediment

Y Subhash, Ch Sasikala, Ch V Ramana
International Journal of Systematic and Evolutionary Microbiology 2014, 64: 984-8
Strain JC207(T) was isolated from a deep (265 m) sea sediment, and appeared as dark yellow colonies on agar plates with cells staining Gram-negative. Catalase, oxidase and caseinase were positive, while chitinase, gelatinase and amylase were negative. Major (>5 %) fatty acids were iso-C15 : 0, anteiso-C15:0, iso-C17 : 1ω9c, iso-C16 : 0, iso-C15 : 0 3-OH, iso-C17 : 0 3-OH, iso-C14 : 0 and iso-C15:1G. Strain JC207(T) contained phosphatidylethanolamine as the major polar lipid, with minor amounts of five unidentified lipids. A bacterial hopane derivative, diplopterol and adenosylhopane were the major hopanoids. Genomic DNA G+C content was 47.5 mol%. 16S rRNA gene sequence comparisons indicated that strain JC207(T) represented a member of the genus Salinimicrobium within the family Flavobacteriaceae of the phylum Bacteroidetes. Strain JC207(T) had sequence similarity with Salinimicrobium terrae YIM-C338(T) (98%), Salinimicrobium xinjiangense BH206(T) (97.6 %) and other members of the genus Salinimicrobium (<96.8 %). However, strain JC207(T) showed an average of 23.6 ± 4 and 37 ± 4 relatedness (based on DNA-DNA hybridization) with Salinimicrobium terrae CGMCC 1.6308(T) ( = YIM-C338(T)) and Salinimicrobium xinjiangense KCTC 12883(T) ( = BH206(T)), respectively. Morphological, physiological and genotypic differences from the previously described taxa support the classification of strain JC207(T) as a representative of a novel species in the genus Salinimicrobium, for which the name Salinimicrobium sediminis sp. nov. is proposed. The type strain is JC207(T) ( = KCTC 32444(T) = CGMCC 1.12641(T)).

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