Abstract
Acetoin (3-hydroxy-2-butanone), a very popular food spice is now used in many industries (pharmaceuticals, chemicals, paint, etc.). In this study, an acetoin high producing strain, numbered as JNA-310, was newly isolated and identified as Bacillus subtilis which is safe on food industry, based on its physiological, biological tests and 16S rDNA sequence analysis. When glucose was used as carbon source in fermentation, the fermentation characterizations of this strain were analyzed, and a new phenomenon of reverse transforming 2,3-butanediol which was synthesized from glucose in the fermentation broth to acetoin was detected. Before 96 h, glucose which was mainly transformed to 2,3-butanediol and acetoin was totally consumed, and the yield of the two products were 41.7 and 21.0 g/l respectively. Acetoin was only a by product in the fermentation broth at prophase of fermentation. At the end of fermentation, the yield of acetoin was greatly improved and the yield of 2,3-butanediol was declined and the yield of them were about 42.2 and 15.8 g/l, respectively. The results indicated that 2,3-butanediol was reversely transformed to acetoin.
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Acknowledgments
This work was supported by the High-tech Research and Development Programs of China (2007AA02Z207), the National Basic Research Program of China (2007CB707800), the National Natural Science Foundation of China (30970056), the Fundamental Research Funds for the Central Universities (JUSRP31001), the Program for New Century Excellent Talents in University (NCET-07-0380), A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions and the Programme of Introducing Talents of Discipline to Universities (111-2-06).
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Zhang, X., Yang, Tw., Lin, Q. et al. Isolation and identification of an acetoin high production bacterium that can reverse transform 2,3-butanediol to acetoin at the decline phase of fermentation. World J Microbiol Biotechnol 27, 2785–2790 (2011). https://doi.org/10.1007/s11274-011-0754-y
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DOI: https://doi.org/10.1007/s11274-011-0754-y