1887

Abstract

A Gram-stain-negative, motile, aerobic and rod-shaped bacterial strain, designated T17, was isolated from benthic sediment sampled at Jiaozhou Bay, Bohai Sea, China, and its taxonomic position was investigated. The 16S rRNA gene sequence of strain T17 exhibited the highest similarity values to those of the type strain Marinobacter lacisalsi FP2.5 (96.2 %) and Marinobacter koreensis DD-M3 (96.2 %). Strain T17 grew optimally at 35 °C, pH 7.0–8.0 and in the presence of 6.0–10.0 % (w/v) NaCl. The predominant ubiquinone in strain T17 was identified as Q-9. The major fatty acids of strain T17 were C12 : 0, C16 : 0 and C16 : 0 10-CH3. The major polar lipids of strain T17 were phosphatidylethanolamine, phosphatidylglycerol, diphosphatidglycerol, an unidentified aminolipid and an unidentified phospholipid. The DNA G+C content of strain T17 was 63.0 mol%. The draft genome sequence of strain T17 includes 4 755 891 bp in total (N50=2 856 325 bp) with a medium read coverage of 100.0x and 11 scaffolds. In silico DNA–DNA hybridization with the three type strains showed 20.3, 19.7 and 19.9 % relatedness to Marinobacter santoriniensis NKSG1, Marinobacter segnicrescens SS11B1-4 and Marinobacter daqiaonensis CGMCC 1.9167, respectively. On the basis of the phenotypic, phylogenetic, genomic and chemotaxonomic properties, strain T17 is considered to represent a novel species within the genus Marinobacter , for which the name Marinobacter bohaiensis sp. nov. is proposed. The type strain is T17 (=KCTC 52710=MCCC 1K03282).

Keyword(s): Bohai Sea , Marinobacter and T17
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2018-09-19
2019-12-15
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