Abstract
A novel facultatively alkaliphilic bacterium that grows on a chemically defined medium containing n-alkanes as the sole carbon source was isolated from soil. The isolate was obligately aerobic, non-motile, gram-positive, and formed metachromatic granules. It was not acidfast and did not form endospores. The cell wall contained meso-diaminopimelic acid, arabinose, and galactose; the glycan moiety of the cell wall contained acetyl residues. The bacterium was catalase-positive, oxidasenegative, and the G+C content of DNA was 70.8 mol%. According to these tests, the isolate was assigned to the genus Corynebacterium. The bacterium grew well between pH 6.2 to 10.2 and the doubling time in this pH range was 4–6 h. For the growth of the isolate, added Na+ in the culture medium stimulated growth, but was not indispensable at both pH 7.2 and pH 10.2. In addition to hydrocarbons, the isolate was able to grow on a chemically defined medium containing acetate, glucose, or fructose as the sole carbon source. Analysis of reduced minus oxidized difference spectra of whole cells showed that the bacterium only possessed less than one tenth the amount of total cytochromes as compared with Bacillus alcalophilus. The above results sugest that the bacterium has characteristics different than those of the alkaliphilic Bacillus previously described.
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Ikeda, K., Nakajima, K. & Yumoto, I. Isolation and characterization of a novel facultatively alkaliphilic bacterium, Corynebacterium sp., grown on n-alkanes. Arch. Microbiol. 162, 381–386 (1994). https://doi.org/10.1007/BF00282101
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DOI: https://doi.org/10.1007/BF00282101