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摘要
A Gram-stain negative, aerobic, rod-shaped bacterial strain, YN2-31A(T), was isolated from rice-field soil, Taoyuan Village, Yunnan province of China. The bacterium was observed to grow at 20-45 A degrees C (optimum 28 A degrees C), at pH 5.0-10.0 (optimum 7.0), and in the presence of 0-2 % (w/v) NaCl (optimum 0-1 %). Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain YN2-31A(T) is most closely related to Arenimonas daejeonensis DSM 18060(T) (96.1 %), Arenimonas malthae DSM 21305(T) (95.9 %), Arenimonas donghaensis DSM 18148(T) (95.1 %), Arenimonas composti DSM 18010(T) (94.8 %) and Arenimonas maotaiensis JCM 19710(T) (94.8 %). The major cellular fatty acids (> 10 %) were found to be iso-C-18:1 omega 9c, iso-C-15:0, Sum In Feature 3 (C-16:1 omega 7c/C-16:1 omega 6c), and C-16:0. The major ubiquinone was identified as Q-8 and the major cellular polar lipids were identified as diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and unidentified phospholipids. The genomic DNA G+C content was determined to be 72.3 mol%. The results of the phylogenetic, genetic, phenotypic and chemotaxonomic analyses suggest that strain YN2-31A(T) represents a novel species of the genus Arenimonas, for which the name Arenimonas taoyuanensis sp. nov. is proposed. The type strain is YN2-31A(T) (=DSM 26777(T) = CCTCC AB2012964(T)).
