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Abstract

A Gram-stain-negative, strictly aerobic, non-motile, rod-shaped, manganese-oxidizing bacterial strain, designated DY2–5, was isolated from surface sediment of Pacific Clarion-Clipperton Fracture Zone (CCFZ). Growth occurred at 0–37 °C (optimum 28 °C), pH 6.5–9.0 (optimum pH 7.0–7.5) and in the presence of 1–11 % (w/v) NaCl (optimum 3–4 %). Phylogenetic analysis based on 16S rRNA gene sequences revealed that the novel strain was most closely related to ZXM137 with 96.13 % sequence similarity, and had 16S rRNA gene sequence similarities in the range 93.89–95.87 % with other species of the genus . The dominant fatty acids were summed feature 8 (Cω7 and/or Cω6) and C. The polar lipids of strain DY2–5 comprised phosphatidylglycerol, phosphatidylcholine and two unknown aminolipids. The major respiratory quinone was ubiquinone–10 (Q–10). The DNA G+C content of strain DY2–5 was 64.8 mol%. On the basis of the phenotypic, genotypic and physiological evidence, strain DY2–5 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is DY2–5 ( = JCM 19384 = KCTC 32473).

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2015-11-01
2019-12-05
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