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A Gram-negative, aerobic, non-spore-forming, halophilic bacterial strain, NTU-104T, was isolated from the Szutsao saltern in southern Taiwan, which was previously used as salt production field. The novel isolate grew optimally at 35–40 °C, at pH 7.5–8.0 and in the presence of 5 % (w/v) NaCl. The major fatty acids were C16 : 0, C18 : 1 ω9c, C16 : 1 ω9c, C12 : 0 3-OH and C12 : 0. The predominant quinone was Q-9. Phosphatidylglycerol, diphosphatidylglycerol and phosphatidylethanolamine were the predominant polar lipids. The DNA G+C content was 56.5 mol%. Phylogenetic analyses based on 16S rRNA gene sequences revealed the affiliation of the novel isolate to the genus Marinobacter. DNA–DNA hybridization results between strain NTU-104T and the type strains of the most closely related species, Marinobacter pelagius and Marinobacter koreensis, were 36.4 % and 33.2 %, respectively. On the basis of phenotypic, phylogenetic and genetic analyses, strain NTU-104T is considered to represent a novel species of the genus Marinobacter. The name Marinobacter szutsaonensis sp. nov. is proposed, with strain NTU-104T (=BCRC 17809T=CGMCC 1.7011T=JCM 15751T) as the type strain.
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