Abstract
A novel psychrotolerant, alkalitolerant bacterium, strain Ths, was isolated from a soil sample immersed in hot spring water containing hydrocarbons and grown on a chemically defined medium containing n-tetradecane as the sole carbon source. The isolate grew at 0°C but not at temperatures higher than 45°C; its optimum growth temperature was 27°C. It grew in the pH range of 7–9. The strain utilized C13–C30 n-alkane and fluorene at pH 9 and 4°C. To our knowledge, this is the first report on the bacterium that utilizes a wide range of hydrocarbons at a high pH and a low temperature. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain Ths is closely related to genomic species 6 ATCC 17979 (99.1% similarity), genomic species BJ13/TU14 ATCC 17905 (97.8% similarity), genomic species 9 ATCC 9957 (97.6% similarity) belonging to the genus Acinetobacter and to Acinetobacter calcoaceticus JCM 6842T (97.5% similarity). DNA–DNA hybridization revealed that the isolate has 62, 25, 18 and 19% relatedness, respectively, to genomic species 6 ATCC 17979, genomic species BJ13/TU14 ATCC 17905, genomic species 9 ATCC 9957 and A. calcoaceticus, respectively.
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The authors thank Dr. A. Nemec for providing A. parvus NIPH 384T and A. ursingii NIPH 137T.
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Communicated by L. Huang.
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Yamahira, K., Hirota, K., Nakajima, K. et al. Acinetobacter sp. strain Ths, a novel psychrotolerant and alkalitolerant bacterium that utilizes hydrocarbon. Extremophiles 12, 729–734 (2008). https://doi.org/10.1007/s00792-008-0180-8
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DOI: https://doi.org/10.1007/s00792-008-0180-8