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中国农学通报 ›› 2019, Vol. 35 ›› Issue (16): 54-60.doi: 10.11924/j.issn.1000-6850.casb18030084

• 生物技术科学 • 上一篇    下一篇

米曲霉HDF-7菌体固定化方法的筛选及其优化

王家旺1,2,柴洋洋1,2,周晓杭1,2,葛菁萍1,2   

  1. 黑龙江省哈尔滨市南岗区学府路74号 黑龙江大学生命科学学院
  • 收稿日期:2018-03-16 修回日期:2019-05-13 接受日期:2018-05-07 出版日期:2019-06-04 发布日期:2019-06-04
  • 通讯作者: 葛菁萍
  • 基金资助:
    国家自然科学基金“菌群演替与温水沤麻系统关键酶产生菌代谢组学特征的耦合机制”(31270534);黑龙江大学高层次人才(创新团队)支 持计划“功能微生物选育及其产物应用”(Hdtd2010-17);黑龙江省科技厅“农业微生物发酵技术”科技创新团队。

Screening and Optimization of Immobilization Methods for Apergillus oryzae HDF-7

  • Received:2018-03-16 Revised:2019-05-13 Accepted:2018-05-07 Online:2019-06-04 Published:2019-06-04

摘要: 米曲霉(Apergillus oryzae)菌体固定化产酶及其应用一直是人们研究的热点,筛选出一种适应需要的固定化方法极其重要。利用从传统豆酱中分离得到的米曲霉HDF-7 作为出发菌株,筛选出最佳的固定化方法,并研究各单因素对固定化菌球蛋白酶酶活保留率的影响,通过正交设计实验确定各单因素的最佳组合。结果表明,最佳固定化方法为海藻酸钠法,在海藻酸钠浓度2%时,蛋白酶酶活保留率最高为(27.77±0.80)%,菌体浓度为1:15,固定化时间为2.5 h,CaCl2浓度为3%,正交实验最高蛋白酶酶活保留率为38.67%。本研究通过米曲霉HDF-7 菌体筛选出最佳的固定化方法并对该方法进行优化,进而确定最佳发酵条件并应用到固态发酵中,为固定化方法的选择提供了依据。

关键词: 三七, 三七, 重茬土壤, 火烧土

Abstract: Apergillus oryzae immobilization enzyme production and its application are research hotspots, and screening a method qualified to the requirement of immobilization is essential. A. oryzae HDF-7 isolated from the conventional bean paste is used as a starting strain, and the effects of each single factor on the retention rate of immobilized mycotoxins are investigated. The optimal combination of each single factor is determined by orthogonal design. The results showed that the optimum immobilization method was sodium alginate method, the highest retention rate of protease was (27.77±0.80)% when the concentration of sodium alginate was 2% , the concentration of bacterial cells was 1:15, the immobilization time was 2.5 h, and CaCl2 concentration was 3%, the orthogonal protease activity retention rate was the highest of 38.67%. In this study, the best immobilization method is screened from A. oryzae HDF-7 cells and optimized to determine the optimal fermentation condition, which can be applied to solid-state fermentation.