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A Gram-negative, rod-shaped, non-motile bacterial strain, designated JS12-13T, was isolated from soil from Halla Mountain on Jeju Island, Korea. Analysis of the 16S rRNA gene sequence of strain JS12-13T revealed that it was a member of the genus Polaromonas, sharing 96.9–98.4 % sequence similarity with type strains of the genus Polaromonas and being most closely related to Polaromonas aquatica CIP 108776T. The major fatty acids of strain JS12-13T were summed feature 3 (C16 : 1 ω7c and/or iso-C15 : 0 2-OH; 38.3 %), C16 : 0 (28.4 %), C17 : 0 cyclo (15.9 %) and C18 : 1 ω7c (9.1 %). The major quinone found was ubiquinone-8. The G+C content of the genomic DNA of strain JS12-13T was 63.7 mol%. On the basis of phenotypic and genotypic characteristics, strain JS12-13T represents a novel species of the genus Polaromonas, for which the name Polaromonas jejuensis sp. nov. is proposed. The type strain is JS12-13T (=KACC 12508T =DSM 19351T).
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