Journal
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
Volume 64, Issue -, Pages 1679-1684Publisher
MICROBIOLOGY SOC
DOI: 10.1099/ijs.0.052894-0
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- Regional SubGenBank Support Program of the Rural Development Administration, Republic of Korea
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A halo- and organo-sensitive oligotrophic bacterium, designated strain SY-6(T), was isolated from humus forest soil at Gyeryong mountain in Korea. Cells of the strain were Gram-negative, strictly aerobic, non-motile rods and the strain formed yellow-pigmented colonies on 100-fold-diluted nutrient broth. Strain SY-6(T) grew at pH 6.0-7.0 (optimal growth at pH 7.0), at 10-37 degrees C (optimal growth at 28 degrees C) and at salinities of 0-0.5 % (w/v) NaCl, growing optimally at 0.01% (w/v) NaCl. On the basis of 16S rRNA gene sequence analysis, strain SY-6(T) was shown to belong to the genus Sphingomonas and showed the closest phylogenetic similarity to Sphingomonas polyaromaticivorans B2-7(T) (96.7%). The major polar lipids were phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, phosphatidylcholine and sphingoglycolipid. The predominant ubiquinone and polyamine were Q-10 and sym-homospermidine, respectively. The major fatty acids were C-18:1 omega 7c and C-16:0. The DNA G+C content of the novel isolate was 65.3 mol%. On the basis of the evidence from this polyphasic study, strain SY-6T represents a novel species of the genus Sphingomonas, for which the name Sphingomonas oligoaromativorans sp. nov. is proposed. The type strain is SY-6(T) (=KACC 12948(T)=NBRC 105508(T)).
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