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1 Department of Bioresource Science, Ibaraki University College of Agriculture, Ami-machi, Ibaraki 300-0393, Japan
2 Attic Laboratory, Aoba-ku, Sendai 980-0813, Japan
3 Graduate School of Life Science, Tohoku University, Aoba-ku, Sendai 980-8577, Japan
4 Faculty of Agriculture, Nagoya University, Chikusa-ku, Nagoya 464-8601, Japan
5 Department of Nursing, Yamagata University School of Medicine, Yamagata, Japan
6 Department of Anatomy, Yamagata University School of Medicine, Yamagata, Japan
Correspondence
Hiroyuki Ohta
hohta{at}mx.ibaraki.ac.jp
The taxonomic position of a halo- and organo-sensitive, oligotrophic soil bacterium, strain S213T, was investigated. Cells were Gram-negative, non-motile, strictly aerobic, yellow-pigmented rods of short to medium length on diluted nutrient broth. When 0·1–0·4 % (w/v) NaCl was added to diluted media composed of peptone and meat extract, growth was inhibited with increasing NaCl concentration and the cells became long aberrant forms. When 6 mM CaCl2 was added, the cells grew quite normally and aberrant cells were no longer found at 0·1–0·5 % (w/v) NaCl. Chemotaxonomically, strain S213T contains chemical markers that indicate its assignment to the Sphingomonadaceae: the presence of ubiquinone Q-10 as the predominant respiratory quinone, C18 : 1 and C16 : 0 as major fatty acids, C14 : 0 2-OH as the major 2-hydroxy fatty acid and sphingoglycolipids. 16S rRNA gene sequence analysis indicated that strain S213T belongs to the genus Sphingomonas, exhibiting high sequence similarity to the 16S rRNA gene sequences of Sphingomonas mali IFO 15500T (98·3 %), Sphingomonas pruni IFO 15498T (98·0 %), Sphingomonas asaccharolytica IFO 15499T (97·9 %) and Sphingomonas echinoides DSM 1805T (97·8 %). The results of DNA–DNA hybridization experiments and its phenotypic characteristics clearly distinguished the strain from its nearest neighbours and demonstrate that strain S213T represents a novel Sphingomonas species, for which the name Sphingomonas oligophenolica sp. nov. is proposed. The type strain is S213T (=JCM 12082T=CIP 107926T).
Micrographs of the fine structures of strain S213T are available as supplementary material in IJSEM Online.
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