Evaluation of Positive Interactions for Cell Growth between Bifidobacterial Strains and Propionibacterium freudenreichii by Using a Co-Cultivation System

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  • Kouya Tomoaki
    Department of Materials Chemistry and Bioengineering, Oyama National College of Technology
  • Ishiyama Yohei
    Department of Materials Science and Technology, Faculty of Engineering, Niigata University
  • Tanaka Takaaki
    Department of Materials Science and Technology, Faculty of Engineering, Niigata University
  • Taniguchi Masayuki
    Center for Transdisciplinary Research, Niigata University Department of Materials Science and Technology, Faculty of Engineering, Niigata University

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  • Evaluation of Positive Interactions for Cell Growth between Bifidobacterial Strains and <i>Propionibacterium freudenreichii</i> by Using a Co-Cultivation System

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Positive interactions between Bifidobacterium longum or Bifidobacterium breve and Propionibacterium freudenreichii that enhance cell growth were evaluated using a co-cultivation system. The total dry cell weight of B. longum and P. freudenreichii from co-cultivation was 10.6 g. This value is 1.2-fold higher than the sum (9.1 g) of the maximum dry cell weights obtained from the cultivation of each bacterium. Currently, the total dry cell weight of co-cultivated B. breve and P. freudenreichii was 21.3 g. The total dry cell weight of B. breve and P. freudenreichii is 1.6-fold higher than the sum (13.2 g) of the maximum dry cell weights from two single cultivations of each bacterium. These data are direct evidence for a cooperative interaction between the two microorganisms.

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