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Sneathiella chinensis gen. nov., sp. nov., a novel marine alphaproteobacterium isolated from coastal sediment in Qingdao, China

¹ School of Life Sciences, Heriot-Watt University, Riccarton, Edinburgh EH14 4AS, UK
² Laboratory of Molecular Bacterial Genetics, Department of Genetics, Institute of Biology, Federal University of Rio de Janeiro (UFRJ), Brazil
³ Department of Marine Biology, Ocean University of China, 5 Yushan Road, Qingdao 266003, People's Republic of China
⁴ BCCM/LMG Bacteria Collection, Laboratory of Microbiology, Ghent University, KL Ledeganckstraat, 35, B-9000 Ghent, Belgium
⁵ Deutsche Sammlung von Mikroorganismen und Zellkulturen (DSMZ) GmbH, Mascheroder Weg 1b, D-38124 Braunschweig, Germany

Correspondence
Brian Austin
b.austin{at}hw.ac.uk

The taxonomic position of strain LMG 23452^T, which was isolated from coastal sediment from an aquaculture site near Qingdao, China, in 2000, was determined. Strain LMG 23452^T comprised Gram-negative, non-spore-forming, motile rods and was found to be a halotolerant, aerobic, chemoheterotroph that produces catalase and oxidase. Comparative 16S rRNA gene sequence analysis revealed that strain LMG 23452^T shared approximately 89 % sequence similarity with members of the genera Devosia, Hyphomonas, Ensifer and Chelatococcus, which belong to two different orders within the Alphaproteobacteria. Further phylogenetic analysis of the 16S rRNA gene sequence showed that strain LMG 23452^T formed a separate branch within the order Rhizobiales, falling between the genera Devosia and Ensifer of the families Hyphomicrobiaceae and Rhizobiaceae, respectively. Strain LMG 23452^T could be differentiated from its closest phylogenetic neighbours on the basis of several phenotypic features, including hydrolysis of the substrates starch and casein and assimilation of the carbohydrates D-glucose, D-mannose, mannitol, maltose and L-arabinose, and chemotaxonomically by the presence of the fatty acids C_{14 : 0} 3-OH, C_{16 : 1}11c, C_{16 : 1}5c and C_{18 : 1}5c. The major fatty acids detected in strain LMG 23452^T were C_{18 : 1}7c, C_{16 : 0}, C_{19 : 0} cyclo 8c, C_{16 : 1}7c and C_{17 : 1}6c and the G+C content of the genomic DNA was 57.1 mol%. Therefore, the polyphasic data support the placement of strain LMG 23452^T within a novel genus and species, for which the name Sneathiella chinensis gen. nov., sp. nov. is proposed. The type strain is LMG 23452^T (=CBMAI 737^T).

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