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生防解淀粉芽孢杆菌CC09合成iturin A条件的响应面优化

刘京兰1, 蔡勋超1, 薛雅蓉1, 刘常宏1, 余向阳2   

  1. 1. 南京大学生命科学学院/医药生物技术国家重点实验室, 南京 210093;
    2. 江苏省农业科学院食品质量安全与检测研究所, 南京 210014
  • 收稿日期:2015-06-19 出版日期:2016-04-08 发布日期:2016-04-08
  • 通讯作者: 刘常宏
  • 作者简介:刘京兰(1986?),女,硕士研究生,E-mail:liujinglanzpf@aliyun.com
  • 基金资助:
    国家自然科学基金(31272081,31471810);江苏省科技支撑项目(BE2012372)

Optimization of Iturin A Synthesis by Bacillus amyloliquefaciens CC09 Using Response Surface Technique

LIU Jinglan1, CAi Xunchao1, XUE Yarong1, LIU Changhong1, YU Xiangyang2   

  1. 1. State Key Laboratory of Pharmaceutical Biotechnology/College of Life Sciences, Nanjing University, Nanjing 210093, China;
    2. Institute of Food Safety and Monitoring Technology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
  • Received:2015-06-19 Online:2016-04-08 Published:2016-04-08

摘要: 采用摇瓶发酵试验,比较了11种已用于芽孢杆菌合成环脂肽的培养基对解淀粉芽孢杆菌CC09产iturin A的影响,筛选适合菌株CC09产iturin A的主要营养成分。然后采用Plackett-Burman设计、中心组合设计和响应面分析等方法,优化培养基组成及发酵条件。获得了解淀粉芽孢杆菌CC09摇瓶发酵产生iturinA的最佳培养基组成为小麦粉14 g/L、黄豆饼粉25 g/L、玉米粉8 g/L、MgSO4 0.1 g/L、MnSO4 2.5 mg/L、FeSO4 0.8 mg/L;最佳发酵条件为装液量60 mL/250 mL、pH 6.0、28℃、125 r/min、48 h,在此条件下,生防解淀粉芽孢杆菌CC09合成iturin A的产量达501 mg/L,较优化前的138 mg/L提高了4.2倍,且发酵成本是利用改良LB培养基的4.3%。

关键词: 解淀粉芽孢杆菌, iturin A, 培养基成分, 发酵条件, 响应面

Abstract: By shaking flask-fermentation assay, we compared the effects of 11 media commonly used for the cycle lipopeptide production by Bacillus spp. on the Iturin A synthesis of strain CC09, and optimized fermentation conditions by using the Plackett-Burman method, the central composite design and the response surface techniques. Results showed that CC09 could produce Iturin A up to 501 mg/L under the optimal medium:wheat powder 14 g/L, soybean meal 25 g/L, corn flour 8 g/L, MgSO4 0.1 g/L, MnSO4 2.5 mg/L, FeSO4 0.8 mg/L; and culture condition:60 mL medium in 250 mL flask, pH 6, 28℃, 125 r/min, 48 h. Under the optimized condition, the production of Iturin A by strain CC09 is 4.2-fold higher than that by the strain fermented in LB medium (138 mg/L). Moreover, the fermentation cost under the optimal condition is about 4.9% of the cost under the modified LB medium.

Key words: Bacillus amyloliquefaciens, iturin A, medium composition, fermentation condition, response surface technique

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