Abstract
Lactobacillus brevis NCL912 is a high γ-aminobutyric acid-producing strain isolated from fermented vegetables. In the present study, the growth and survival of L. brevis NCL912 were investigated in media with or without sodium L-glutamate at different acidic pH levels. L. brevis NCL912 was incubated in acid-modified MRS broth with or without sodium L-glutamate. The results show that L. brevis NCL912 grows at pH > 3.0 in the media with or without sodium L-glutamate, and the optimal growth pH is 5.0. L. brevis NCL912 could be survive for more than 2 h at pH 2.0. The addition of sodium L-glutamate significantly enhances acid resistance and glutamate decarboxylase activity (p < 0.05). L. brevis NCL912 displays resistance to acid stress. Sodium L-glutamate is an important factor for the growth and survival of L. brevis NCL912 at different acidic pH.
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Acknowledgements
Special thanks to Doctor Haixing Li for his helpful suggestions and assistance. The work was supported by the Education Department of Jiangxi province (No.S00488).
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Huang, G., Li, C. & Cao, Y. Effect of sodium L-glutamate on growth and survival of Lactobacillus brevis NCL912 at different acidic pH. Ann Microbiol 62, 351–355 (2012). https://doi.org/10.1007/s13213-011-0269-7
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DOI: https://doi.org/10.1007/s13213-011-0269-7