Henriciella litoralis sp. nov., isolated from a tidal flat, transfer of Maribaculum marinum Lai et al. 2009 to the genus Henriciella as Henriciella aquimarina nom. nov. and emended description of the genus Henriciella

Se Hee Lee, Jae Kuk Shim, Jeong Myeong Kim, Hyung-Kyoon Choi, Che Ok Jeon
International Journal of Systematic and Evolutionary Microbiology 2011, 61: 722-7
A Gram-staining-negative, strictly aerobic bacterium, designated strain SD10(T), was isolated from a tidal flat of the Yellow Sea, South Korea. Cells were non-spore-forming rods that showed catalase- and oxidase-positive reactions. Growth of strain SD10(T) was observed at 15-40 °C (optimum, 25-30 °C), at pH 6.0-9.0 (optimum, pH 6.5-8.5) and in the presence of 1-10 % (w/v) NaCl. Strain SD10(T) contained ubiquinone-10 (Q-10) as a major isoprenoid quinone and C(18 : 1)ω7c (39.3 %), C(16 : 0) (20.2 %), C(17 : 0) (8.9 %) and C(17 : 1)ω6c (8.1 %) as major fatty acids. The cellular polar lipids were identified as phosphatidylglycerol, monoglycosyldiglyceride, glucuronopyranosyldiglyceride and two unidentified glycolipids. The G+C content of the genomic DNA was 55.2 mol%. Based on 16S rRNA gene sequence similarities, the strain was most closely related to Henriciella marina Iso4(T) and Maribaculum marinum P38(T), with similarities of 97.8 and 97.0 %, respectively. The DNA-DNA relatedness between strain SD10(T) and H. marina Iso4(T) was 12.0±3.2 %. A phylogenetic analysis based on 16S rRNA gene sequences showed that M. marinum P38(T) and H. marina Iso4(T) formed a monophyletic cluster and that their 16S rRNA gene sequence similarity was 98.1 %. DNA-DNA hybridization between H. marina Iso4(T) and M. marinum LMG 24711(T) was 22.9±2.7 %, indicating that the two strains belong to separate species. On the basis of chemotaxonomic data and molecular properties, we propose that strain SD10(T) represents a novel species of the genus Henriciella, for which the name Henriciella litoralis sp. nov. is proposed. The type strain is SD10(T) ( = KACC 13700(T)  = DSM 22014(T)). In addition, we propose to transfer Maribaculum marinum Lai et al. 2009 to the genus Henriciella as Henriciella aquimarina nom. nov. (type strain P38(T)  = CCTCC AB 208227(T)  = LMG 24711(T)  = MCCC 1A01086(T)), and we present an emended description of the genus Henriciella.

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