1887

Abstract

A Gram-stain-negative, yellow-pigmented, non-flagellated, gliding, rod-shaped, oxidase-negative and catalase-positive bacterium, designated SE14, was isolated from soil on King George Island, South Shetland Islands, Antarctica. Strain SE14 grew at 4–25 °C (optimum, 20 °C), at pH 6.0–9.0 (optimum, pH 7.0–7.5) and with 0–3.0 % NaCl (optimum, 1.0–1.5 %), and could not produce flexirubin-type pigments. 16S rRNA gene sequence analysis showed the the isolate belonged to the genus . Strain SE14 had the highest 16S rRNA gene sequence similarity to , and with 95.8, 95.5 and 95.2 %, respectively. The strain SE14 consisted of a clade with (16S rRNA gene sequence similarity 94.9 %) and (16S rRNA gene sequence similarity 94.2 %) and simultaneously formed a distinct phyletic lineage in the neighbour-joining phylogenetic tree. Polar lipids of the strain included phosphatidylethanolamine and four unidentified aminolipids. Strain SE14 contained anteiso-C, iso-C and a mixture of iso-C 2-OH and/or C 7 as the main fatty acids, and the only respiratory quinone was menaquinone-6. The genomic DNA G+C content was 42.3 mol%. The polyphasic taxonomic study revealed that strain SE14 belongs to a novel species within the genus , and the name sp. nov. is proposed. The type strain is SE14 (=CCTCC AB 2017225=KCTC 52612).

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2018-02-01
2019-12-16
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