浙江农业科学 ›› 2026, Vol. 67 ›› Issue (3): 726-731.DOI: 10.16178/j.issn.0528-9017.20240204

• 食品技术 • 上一篇    下一篇

降血糖型鼠李糖乳杆菌的耐受性及培养条件优化

武淑婷(), 武鹏飞, 陈春莹, 张宇庆, 邢金瞻, 安丽霞, 孙亚莉()   

  1. 晋中信息学院,山西 晋中 030800
  • 收稿日期:2024-03-12 出版日期:2026-03-11 发布日期:2026-03-30
  • 通讯作者: 孙亚莉
  • 作者简介:孙亚莉,E-mail:sunyali408@126.com
    武淑婷,从事生物技术研究工作。E-mail:3270484466@qq.com
  • 基金资助:
    2023山西省大学生创新创业训练计划项目(20221607);晋中信息学院2022年校级教学改革研究一般项目(2022XJ015)

Tolerance and culture condition optimization of hypoglycemic Lactobacillus rhamnosus

WU Shuting(), WU Pengfei, CHEN Chunying, ZHANG Yuqing, XING Jinzhan, AN Lixia, SUN Yali()   

  1. Jinzhong College of Information,Jinzhong 030800,Shanxi
  • Received:2024-03-12 Online:2026-03-11 Published:2026-03-30
  • Contact: SUN Yali

摘要:

本研究对3个降血糖型鼠李糖乳杆菌菌株进行了降血糖能力的比较,并以筛选出的降血糖功能最佳的鼠李糖乳杆菌JYLR-005为材料,通过耐酸性、耐牛胆盐性及在人工肠液和人工胃液中的存活率等指标研究鼠李糖乳杆菌JYLR-005的耐受特性,并对菌株的培养条件进行了优化。结果表明,鼠李糖乳杆菌JYLR-005在pH值1.5~6.5的培养基中均能生长,且在pH值6.5时存活率较高,并随时间推移有一定增加;鼠李糖乳杆菌JYLR-005在3~9 mg·L?1的牛胆盐浓度下可以存活,具有一定的耐牛胆盐性;鼠李糖乳杆菌JYLR-005在pH值1.5的人工胃液和pH值6.8的人工肠液中的存活率均随时间延长而逐渐降低。正交试验表明,pH值7.5、温度40 ℃、接种量5%、时间54 h为鼠李糖乳杆菌JYLR-005的最适培养条件。

关键词: 鼠李糖乳杆菌, 降血糖, 耐受性, 存活率

Abstract:

This study compared the hypoglycemic abilities of three strains of Lactobacillus rhamnosus and selected Lactobacillus rhamnosus JYLR-005,which demonstrated the best hypoglycemic function,for further investigation. The tolerance characteristics of Lactobacillus rhamnosus JYLR-005 were evaluated through acid tolerance,bile salt tolerance,and survival rates in simulated intestinal fluid and simulated gastric fluid. Additionally,the culture conditions for the strain were optimized. The results indicated that Lactobacillus rhamnosus JYLR-005 could grow in media with pH values ranging from 1.5 to 6.5,showing a higher survival rate at pH value 6.5,which increased over time. The strain could survive under ox bile salt concentrations of 3-9 mg·L?1,indicating a certain level of bile salt tolerance. The survival rates of Lactobacillus rhamnosus JYLR-005 in simulated gastric fluid(pH value 1.5)and simulated intestinal fluid(pH value 6.8)gradually decreased over time. Orthogonal experiments revealed that the optimal culture conditions for Lactobacillus rhamnosus JYLR-005 were pH value 7.5,temperature 40 °C,inoculum size 5%,and incubation time 54 h.

Key words: Lactobacillus rhamnosus, hypoglycemia, tolerance, survival rate

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