1887

Abstract

A novel bacterial strain, designated S2-2, was isolated from the intestine of a sea cucumber in Xiapu, Fujian province, China. Strain S2-2 was found to be aerobic, Gram-stain-negative, pale yellow, rod-shaped, oxidase- and catalase-positive. Growth occurred at 15–36 °C (optimum, 25–32 °C), in the presence of 2–7% sea salt (w/v, optimum, 3–5%) and at pH 6–9 (optimum, pH 7.0). The isolate was able to hydrolyse gelatin, casein and DNA, but unable to degrade Tween 20, 40 and 80, starch and cellulose. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain S2-2 represented a member of the genus , with highest sequence similarity to a4 (96.9% similarity), followed by WJ-1 (96.5% similarity) and showed lower similarities (93.3–95.9%) with other members of the genus . The major cellular fatty acids were summed feature 3 (comprising Cω6/Cω7, 33.8%), iso-C (13.7%), iso-CG (8.6%), iso-C 3-OH (5.3%) and C 3-OH (5.1%). The DNA G+C content of the chromosomal DNA was determined to be 31.8 mol%. The respiratory quinone was determined to be MK-6. Phosphatidylethanolamine, phosphatidylglycerol, one unknown aminophospholipid, one unknown phospholipid, one unknown glycolipid and five unknown lipids were detected as major polar lipids. Hence, the combined genotypic and phenotypic data indicated that strain S2-2 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is S2-2 ( = MCCC 1A09872 = LMG 27758).

Funding
This study was supported by the:
  • Scientific Research Foundation of the Third Institute of Oceanography, SOA (Award 14CZP034HJ08)
  • Public Welfare Project of SOA (Award 2012002)
  • the Fund of National Infrastructure of Microbial Resources (Award 201005032)
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2015-12-01
2024-11-06
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