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投稿时间:2014-10-27
投稿时间:2014-10-27
中文摘要: 探讨侧孢短芽孢杆菌 S62-9 的发酵培养基和发酵条件对产抗菌肽的影响,通过单因素试验,确定了 3 个显著 因素,采用正交试验对产抗菌肽的发酵培养基组成进行了优化,并确定了最佳发酵条件。结果表明,S62-9 产抗菌肽的最佳 培养基组成和发酵条件:糊精 1 %、蛋白胨 2 %、CaCl2 0.15 %、Tween-20 1.5 %;起始 pH 为 7.0,装液量为 40 mL/300 mL,以3 %的接种量于 37 ℃,250 r/min 摇床培养 22 h。在此条件下产抗菌肽较优化前相比提高了 59.9 %。
Abstract:The optimal medium compositions and the optimal cultural conditions of antibacterial peptide produced by Brevibacillus laterosporus S62-9 were discussed. Different factors were investigated such as the ingredients of medium, temperature, pH, inoculating amount and medium capacity on production of antibacterial peptide in order to optimize fermentation condition of S62-9. The optimal results were dextrin 1 %, peptone 2 %, CaCl2 0.15 %, Tween-20 1.5 %. Through shake-flask experiments, the best culture conditions were pH 7.0, 40 mL/300 mL, 250 r/min and 3 % inoculation, 37 ℃ for 22 h. Cultured in this condition, the yield of antibacterial peptide increased 59.9 % compared with initial fermentative conditions.
文章编号:201603046 中图分类号: 文献标志码:A
基金项目:河北省自然基金项目“侧孢短芽孢杆菌抗菌肽对食源性金 黄色葡萄球菌的抑菌机理研究”(C2014208137)
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