食品科学 ›› 2013, Vol. 34 ›› Issue (7): 171-174.doi: 10.7506/spkx1002-6630-201307036

• 生物工程 • 上一篇    下一篇

α-葡聚糖酶发酵工艺及其酶活性影响因素研究

麻少莹,陆海勤,杭方学,李 凯*,苏佳廷,郭海蓉   

  1. 广西大学轻工与食品工程学院,广西 南宁 530004
  • 收稿日期:2011-10-18 修回日期:2013-02-22 出版日期:2013-04-15 发布日期:2013-03-20
  • 通讯作者: 李 凯 E-mail:mashaoying@yeah.net
  • 基金资助:
    “十二五”国家科技支撑计划重点项目(20111BAE16B03);广西自然科学基金项目(2010GXNSFA013044)

Factors Affecting α-Dextranase Fermentation and Its Enzymatic Activity

MA Shao-ying,LU Hai-qin,HANG Fang-xue,LI Kai*,SU Jia-ting,GUO Hai-rong   

  1. College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China
  • Received:2011-10-18 Revised:2013-02-22 Online:2013-04-15 Published:2013-03-20
  • Contact: LI Kai E-mail:mashaoying@yeah.net

摘要: 对细丽毛壳液体发酵产α-葡聚糖酶的主要影响因子,包括发酵初始pH值、装液量、接种量、发酵时间等进行研究,并考察pH值、温度、作用时间对α-葡聚糖酶酶活力的影响。结果表明:最佳发酵条件为发酵pH5.5、装液量20mL/250mL、接种量3%、发酵时间92h,菌株酶活力由原来的79.0U/mL提高到231.5U/mL,提高了193%。α-葡聚糖酶的酶活力在pH5.5、温度60℃、作用时间10min时最高。

关键词: 细丽毛壳, α-葡聚糖酶, 发酵工艺, 酶活性

Abstract: The main factors influencing α-dextranase production by Chaetomium gracile in liquid-state fermentation (including pH, medium volume in a shaking flask, inoculum size and fermentation time) were studied. Meanwhile, the effects of pH, temperature and time on α-dextranase activity were investigated. The optimal fermentation conditions for α-dextranase production were 5.5, 20 mL/250 mL, 3% and 92 h for pH, medium volume in a shaking flask, inoculum size and fermentation time, respectively. Under these conditions, the α-dextranase activity of fermentation broth was 231.5 U/mL, which was 193% higher than the 79.0 U/mL before optimization. The highest α-dextranase activity was observed under the optimal reaction conditions of pH 5.5, 60 ℃ and 10 min.

Key words: Chaetomium gracile, α-dextranase, fermentation, enzyme activity

中图分类号: