Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Influence of Culture Comditions on Acid Tolerance of Lactobacillus casei YIT 9018

배양조건에 따른 Lactobacillus casei YIT 9018의 니산성 변화

  • 심재헌 (한국야쿠르트 유업(주) 연구소) ;
  • 김상교 (한국야쿠르트 유업(주) 연구소) ;
  • 백영진 (한국야쿠르트 유업(주) 연구소) ;
  • 오태광 (한국과학기술원 유전공학연구소) ;
  • 양한철 (고려대학교 식품공학과)
  • Published : 1995.02.01
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Abstract

We studied the influence of culture conditions on the acid tolerance of Lactobacillus casei YIT 9018 in artificial gastric juice with respect to relative amount of membrane bound ATPase and their biochemical characteristics. With raising incubation temperature from 30.5$\circ$C to 40.5$\circ$C and lengthening incubation time from exponential phase to late stationary phase, the acid tolerance of L. casei YIT 9018 was increased. As acid tolerance enhanced, C$_{18:1}$ content of membrane fatty acid was reduced and C$_{19:0 cyclo}$ was enriched but the others were not changed greatly. At high ATPase activity, proton permeability was relatively low but this phenomenon did not correspond to acid tolerance. In conclusion, it was considered that changes of C$_{18:1}$ and C$_{19:0 cyclo}$ were closely related to the acid tolerance of L. casei YIT 9018.

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References

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