Acid Tolerance of Leuconostoc mesenteroides and Lactobacillus plantarum

  title={Acid Tolerance of Leuconostoc mesenteroides and Lactobacillus plantarum},
  author={L. C. Mcdonald and Henry P. Fleming and Helmy M. Hassan},
  journal={Applied and Environmental Microbiology},
  pages={2120 - 2124}
In this study, we determined the internal cellular pH response of Leuconostoc mesenteroides and Lactobacillus plantarum to the external pH created by the microorganisms themselves or by lactic or acetic acids and their salts added to the growth medium. Growth of Leuconostoc mesenteroides stopped when its internal pH reached 5.4 to 5.7, and growth of L. plantarum stopped when its internal pH reached 4.6 to 4.8. Variation in growth medium composition or pH did not alter the growth-limiting… 
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This investigation was initiated with the purpose of studying the effect of acetic acid on certain microorganisms related to food spoilage with the hope of securing results of practical value. The
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