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1 Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, P. R. China
2 Qingdao Institute of Marine Geology, Qingdao 266071, P. R. China
3 Department of Materials and Life Science, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto City, Kumamoto 860-8555, Japan
Correspondence
Xiao-Lei Wu
xiaolei_wu{at}tsinghua.edu.cn
A Gram-negative, motile, non-spore-forming and moderately halophilic ellipsoid-shaped marine coccobacillus, designated strain SS011B1-4T, was isolated from benthic sediment of the South China Sea. Optimum growth occurred at 30–37 °C, pH 7.5–8.0 and 4–8 % (w/v) NaCl. Strain SS011B1-4T utilized a variety of organic substrates as sole carbon sources, but did not utilize toluene, n-tetradecane or crude oil. Strain SS011B1-4T had ubiquinone-9 as the major respiratory quinone and C18 : 1
9c, C16 : 0 and C12 : 0 3-OH as the predominant fatty acids. The genomic DNA G+C content was 62.2 mol%. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain SS011B1-4T belonged to the genus Marinobacter of the Gammaproteobacteria. The results of the phenotypic, phylogenetic and genomic analyses revealed that strain SS011B1-4T represents a novel species of the genus Marinobacter. The name Marinobacter segnicrescens sp. nov. is therefore proposed, with strain SS011B1-4T (=LMG 23928T=CGMCC 1.6489T) as the type strain.
A figure showing the growth rate of strain SS011B1-4T and two closely related Marinobacter species is available with the online version of this paper.
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