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Growth Characteristics and Metabolite Bacteriostatic Action of Propionibacterium freudenreichii

ZHENG Lixue1,2, WANG Jingchu2, SHI Huijia2, CAO Xue3, QI Bin1,*   

  1. 1. College of Biology and Food Engineering, Changshu Institute of Technology, Changshu 215500, China;
    2. Suzhou Key Laboratory of Food and Biotechnology, Changshu 215500, China;
    3. National Engineering Research Center of Corn Deep Processing, Jilin COFCO Bio-chemical Co. Ltd., Changchun 130033, China
  • Online:2015-08-15 Published:2015-08-17

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Abstract:

The growth characteristics and metabolite bacteriostasis of Propionibacterium freudenreichii were studied. The
results showed: the strain’s growth cycle was approximately 10 days, involving logarithmic phase (1–3 d), stability phase
(4–8 d) and decline phase (9–10 d). In the process of growth, sugar was consumed quickly, and almost completely
depleted in the first day. The pH after 1 day of fermentation dropped to 4.6 and then remained at 4.6 during the remaining
fermentation period. Under the same conditions, the bacteriostatic effect of Propionibacterium freudenreichii metabolites on
E. coli was better than those of Staphylococcus aureus and yeast. Bacteriocins were dominant metabolites with antimicrobial
activity besides propionic acid.

Key words: Propionibacterium freudenreichii, growth characteristics, antimicrobial substances, bacteriocins

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