Isolation of an extremely boron-tolerant strain of Bacillus firmus

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Abstract:

A strain of Bacillus firmus (designated strain KC) isolated from a boron (B) mine in California exhibited extreme tolerance to B, provided it was first acclimated at intermediate B supply concentrations. Strain KC tolerated up to 1000 mmol/L B (boric acid-B) and 1800 mmol/L B (sodium tetraborate-B), and attained the greatest growth (as measured by absorbance) at 300 mmol/L B. Despite its extreme tolerance to high B, there was no evidence that it was able to remove significant quantities of B from the growth media, suggesting that strain KC is not likely to be useful for the removal of B from wastewaters in an engineered bioreactor.

Keywords: Bacillus firmus; Variovorax boronicumulans; bioreactor; bioréacteur; bore; boron

Document Type: Research Article

DOI: http://dx.doi.org/10.1139/w2012-049

Publication date: June 22, 2012

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  • Published since 1954, this monthly journal contains new research in the field of microbiology including applied microbiology and biotechnology; microbial structure and function; fungi and other eucaryotic protists; infection and immunity; microbial ecology; physiology, metabolism and enzymology; and virology, genetics, and molecular biology. It also publishes review articles and notes on an occasional basis, contributed by recognized scientists worldwide.
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