Marinobacter daqiaonensis sp. nov., a moderate halophile isolated from a Yellow Sea salt pond
2011
Qu, Lingyun | Zhu, Fengling | Zhang, Jinxing | Gao, Chunlei | Sun, Xiuqin
A Gram-negative, oxidase- and catalase-positive, moderately halophilic strain, designated YCSA40T, was isolated from sediment of Daqiao saltern in Qingdao, on the east coast of China. Growth occurred at 10–45 °C, at pH 5–9 and with 1–15 % NaCl. Strain YCSA40T showed the highest 16S rRNA gene sequence similarity to Marinobacter segnicrescens SS011B1-4T (97 %) and M. gudaonensis SL014B61AT (96.9 %) and 16S rRNA gene sequence phylogenetic analysis assigned the isolate to the genus MARINOBACTER: Strain YCSA40T contained C18 : 1Ï9c (34.8 %), C16 : 0 (11.6 %), C19 : 0 cyclo Ï10c/C19 : 1Ï6c (10.5 %), C16 : 1Ï9c (8.4 %), C17 : 0 (6.3 %) and C12 : 0 3-OH (5.8 %) as the predominant fatty acids. The DNA G+C content was 60.8 mol% and the major ubiquinone was Q-9. These chemotaxonomic characters were all consistent with membership of the genus MARINOBACTER: DNA–DNA relatedness between the isolate and M. segnicrescens CGMCC 1.6489T, M. gudaonensis CGMCC 1.6294T and other type strains of species of the genus Marinobacter was ≤30 %. On the basis of the aforementioned data, it was concluded that strain YCSA40T represents a novel species of the genus Marinobacter, for which the name Marinobacter daqiaonensis sp. nov. is proposed. The type strain is YCSA40T ( = CGMCC 1.9167T = NCCB 100308T = LMG 25365T).
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