食品科学 ›› 2010, Vol. 31 ›› Issue (21): 195-199.doi: 10.7506/spkx1002-6630-201021044

• 生物工程 • 上一篇    下一篇

响应面法优化植物乳杆菌lp15-2-1产共轭亚油酸发酵条件

周 倩,刘 佩,马鎏镠,阮 晖,何国庆*   

  1. 浙江大学生物系统工程与食品科学学院
  • 收稿日期:2010-02-08 出版日期:2010-11-15 发布日期:2010-12-29
  • 通讯作者: 何国庆* E-mail:gqhe@zju.edu.cn
  • 基金资助:

    国家“863”计划重点项目(2007AA100402)

Optimization of Fermentation Conditions for Producing Conjugated Linoleic Acid in Lactobacillus plantarum lp15-2-1 by Response Surface Analysis

ZHOU Qian,LIU Pei,MA Liu-liu,RUAN Hui,HE Guo-qing*   

  1. School of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, China
  • Received:2010-02-08 Online:2010-11-15 Published:2010-12-29
  • Contact: HE Guo-qing E-mail:gqhe@zju.edu.cn

摘要:

对植物乳杆菌(Lactobacillus plantarum)lp15-2-1 转化亚油酸生成共轭亚油酸(CLA)发酵工艺进行研究。通过单因素试验确定最佳接种量、培养温度、初始pH 值、培养时间、亚油酸添加时间、亚油酸质量浓度。采用响应面Box-Benhnken 试验设计,建立初始pH 值、培养温度和亚油酸质量浓度的二次多项式回归方程模型,所得植物乳杆菌发酵产共轭亚油酸的最佳参数为:温度30℃、亚油酸质量浓度0.21mg/mL、初始pH6.3,此条件下,CLA得率为44.77μg/mL,CLA 理论得率为45.326μg/mL,转化率为21.32%,与优化前转化率7.78% 相比,有了很大提高。

关键词: 共轭亚油酸, 植物乳杆菌, 响应面法

Abstract:

In this work, the fermentation conditions for converting linoleic acid into conjugated linoleic acid (CLA) by Lactobacillus plantarum lp15-2-1 were studied. Single factor experiments were done to understand the effects of inoculum amount, incubation temperature, pH, incubation time and initial level of linoleic acid on CLA production. Using response surface Box-Benhnken design, a quadratic polynomial regression model was established. The results indicated that the optimal levels of incubation temperature, initial level of linoleic acid and pH were30 ℃, 0.21 mg/mL and 6.3, respectively. Under these optimal fermentation conditions, the yield and conversion rate of CLA were 44.77μg/mL and 21.32 %, which were higher than the predicted values of 45.326μg/mL and 7.78 %, respectively.

Key words: conjugated linoleic acid (CLA), Lactobacillus plantarum, response surface methodology

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