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Marinobacter szutsaonensis sp. nov., isolated from a solar saltern

Department of Horticulture, National Taiwan University, 140, Keelung Road, Section 4, Taipei 106, Taiwan, ROC

Correspondence
Yuan-Tay Shyu
tedshyu{at}ntu.edu.tw

A Gram-negative, aerobic, non-spore-forming, halophilic bacterial strain, NTU-104^T, 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 C_{16 : 0}, C_{18 : 1}9c, C_{16 : 1}9c, C_{12 : 0} 3-OH and C_{12 : 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-104^T 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-104^T is considered to represent a novel species of the genus Marinobacter. The name Marinobacter szutsaonensis sp. nov. is proposed, with strain NTU-104^T (=BCRC 17809^T=CGMCC 1.7011^T=JCM 15751^T) as the type strain.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain NTU-104^T is EU164778.

A table detailing the fatty acid contents of strain NTU-104^T and some related species of the genus Marinobacter and figures showing the polar lipid analysis and additional phylogenetic trees are available with the online version of this paper.