生物技术通报 ›› 2013, Vol. 0 ›› Issue (1): 186-190.

• 研究报告 • 上一篇    下一篇

原生质体融合技术选育分解草酸乳酸菌菌株的研究

张禹1 ,毛淑红1 ,路福平1 ,聂实践2   

  1. 1. 天津科技大学生物工程学院 工业发酵微生物教育部重点实验室 工业酶国家工程实验室 天津市工业微生物重点实验室, 天津 300457 ;2. 北京百林康源生物技术有限责任公司,北京 100069
  • 收稿日期:2012-07-27 修回日期:2013-01-31 出版日期:2013-01-30 发布日期:2013-01-30
  • 作者简介:张禹,男,硕士研究生,研究方向:微生物与生化药学;E-mail: zhangyu03170@126.com
  • 基金资助:
    天津市应用基础及前沿技术研究计划(12JCQNC06400)

Screening of the Oxalate-degrading Lactobacillus Strains Using Protolast Fusion Technology

Zhang Yu1, Mao Shuhong1, Lu Fupin1, Nie Shijian2   

  1. "1. Key Laboratory of Industrial Fermentation Microbiology,Ministry of Education,National Engineering Laboratory for Industrial Enzymes,Tianjin Key Laboratory of Industrial Microbiology,College of Biotechnology,Tianjin University of Science & Technology, Tianjin 300457;
    2. Brins-LivePro Biotechnology Corporation,Beijing 00069"
  • Received:2012-07-27 Revised:2013-01-31 Published:2013-01-30 Online:2013-01-30

摘要: 将具有草酸分解能力的乳双歧杆菌和具有耐氧特性的嗜酸乳杆菌进行原生质体融合,其最佳条件为:50% 的PEG 6000,融合温度30℃,融合时间为7 min,CaCl2 浓度为0.02 mol/L,MgCl2 浓度为0.5 mol/L,在此条件下融合率可达7.6%。从中筛 选出同时具有耐氧特性和草酸分解能力的融合子,草酸分解率为13.4%。

关键词: 草酸, 乳酸菌, 原生质体融合, 筛选, 融合率

Abstract: Bifidobacterium lactis with oxalate-degrading capacity can efficiently reduce the oxalate in vivo, and can be used to prevent and treat kidney stone diseases. While Bifidobacterium lactis is poorly oxygen-tolerant, that can not be employed as microbial ecological agents. In this study, protoplast fusion was studied between Bifidobacterium lactis with oxalate-degrading capacity and oxygen-tolerant lactobacillus acidophilus. Under the optimum conditions of protoplast fusion with PEG 6000 concentration 50%, fusion time 7 min, fusion temperature 30℃ , concentration of CaCl2 0.02 mol/ L and the concentration of MgCl2 0.5 mol/ L, the fusion rate reached 7.6%, and a oxygen-tolerant fusant showing the level of oxalate degradation at 13.4% was obtained.

Key words: Oxalate , Lactobacillus , Protoplast fusion , Selected , Fusion frequency