Abstract
The facultative anaerobe Pantoea sp. strain A-13, isolated from ornithogenic soil of Dewart Island (Frazier Islands), Antarctica, produced glycolipid biosurfactants when grown on n-paraffins or kerosene as the sole source of carbon and energy. Hemolysis of erythrocytes, growth inhibition of Bacillus subtilis, and thin-layer chromatography studies have suggested that the secreted glycolipids are rhamnolipids. Glycolipids produced by kerosene-grown cells decreased the surface tension at the air–water interface to 30 mN/m and possessed a low critical micelle concentration value of 40 mg/l, which indicated high surface activity. They efficiently emulsified aromatic hydrocarbons, kerosene, and n-paraffins. Biosurfactant production contributed to an increase in cell hydrophobicity, which correlated with increased growth of the strain on tested hydrocarbons. According to the results, the Antarctic biosurfactant-producing strain Pantoea sp. A-13 appears to be valuable source for application in accelerated environmental bioremediation.
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Vasileva-Tonkova, E., Gesheva, V. Biosurfactant Production by Antarctic Facultative Anaerobe Pantoea sp. During Growth on Hydrocarbons. Curr Microbiol 54, 136–141 (2007). https://doi.org/10.1007/s00284-006-0345-6
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DOI: https://doi.org/10.1007/s00284-006-0345-6