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研究报告

手性农药在红曲菌发酵过程中的立体选择性行为研究

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  • 浙江工业大学生物工程学院,浙江杭州310014
刘银兰(1990—),女,河南开封人,硕士研究生,研究方向为发酵工程,E-mail:liuyinlan0215@163.com.通信作者:嘉晓勤副教授,E-mail:monascus@zjut.edu.cn.

基金资助

国家文物局指南针计划项目(20130306)

Stereoselective behaviors of chiral pesticide in the Monascus fermentation proces

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  • College of Biotechnology and Bioengineering,Zhejiang University of Technology,Hangzhou 310014,China

摘要

采用高效液相色谱-串联质谱联用技术,研究了手性农药腈菌唑、己唑醇在红曲菌液态发酵和红曲酒酿造过程中的立体选择性降解情况,以及对红曲菌产酶(糖化酶、纤维素酶)和典型代谢产物(红曲色素、桔霉素)的影响.结果表明,腈菌唑、己唑醇的对映异构体的降解速率基本一致,无选择性降解现象发生.腈菌唑、己唑醇的外消旋体及对映异构体对红曲菌产酶和代谢物呈现一定的差异性,其中,在5,0.5mg/L己唑醇条件下,红曲菌产酶及代谢物表现出显著性变化,且(+)-己唑醇
显著性大于(-)-己唑醇,5mg/L质量浓度下显著性大于0.5mg/L;在0.05mg/L己唑醇条件下,红曲菌产酶及次级代谢均不存在显著性差异.此外,不同质量浓度的腈菌唑外消旋体及对映异构体对红曲菌产酶及次级代谢也不存在显著性影响.

本文引用格式

刘银兰,陆跃乐,嘉晓勤 . 手性农药在红曲菌发酵过程中的立体选择性行为研究[J]. 发酵科技通讯, 2017 , 46(2) : 92 -99 . DOI: 10.16774/j.cnki.issn.1674-2214.2017.02.006

Abstract

The stereoselective degradation of myclobutanil and hexaconazole in the submerged fermentation of Monascus and Monascus wine brewing process were analyzed by HPLC-MS/MS,and the effects of enantiomers on enzyme(glucoamylase,cellulose)and secondary metabolites (Monascus pigment,citrinin)of Monascus were investigated.The results showed that the  degradation rate of two enantiomers of myclobutanil and hexaconazole was similar,and no  stereoselective degradation was found.The racemates and enantiomers of myclobutanil and  hexaconazole showed certainly differences in the enzyme production and metabolism of Monascus. At a concentration of 5 and 0.5 mg/L of racemates and enantiomers of hexaconazole, respectively,the enzyme production and metabolites changed significantly,with(+)-hexoxazole  higher than (-)-
hexaconazole.However,at 0.05 mg/L of racemates and enantiomers of
hexaconazole,no significant changes occurred.In addition,there was also no significant  difference between racemates and enantiomers at different concentrations of myclobutanil.
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