棘孢木霉高产漆酶诱变菌株选育及发酵条件优化
朱利霞 , 王桂端 , 麻益歌 , 谭伟 , 马雯婧 , 倪雯珂 , 李鑫 , 陈居田 , 李俐俐
现代化工 ›› 2025, Vol. 45 ›› Issue (12) : 134 -139.
棘孢木霉高产漆酶诱变菌株选育及发酵条件优化
Optimization of breeding and fermentation conditions for highly laccase-producing Trichoderma asperellum mutagenesis strains
Trichoderma asperellum is taken as a start strain to be mutagenized by microwave and hydroxylamine hydrochloride,and highly laccase-producing mutagenesis strains are screened out through guaiacol method.The optimum fermentation conditions are determined via single factor tests and orthogonal tests,and the laccase activity of the mutagenesis strains is verified by simulated culture test.Results show that a high-yield strain,MP1-1,is obtained under the conditions that microwave mutagenesis has performed for 15 s,the concentration of hydroxylamine hydrochloride is 0.9 g/L,and the lethal rate is 90%.The laccase activity of MP1-1 increases by 70.8%.The optimum fermentation conditions for the strains are as follows:glucose is used as carbon source with a dosage of 1%,ammonium nitrate is used as nitrogen source with a dosage of 1%,pH=6.0,Cu2+ concentration is 0.09 mmol/L,inoculation amount is 1 mL,and culture temperature is 28℃.Under these conditions,the laccase activity of MP1-1 reaches 54.51 U/L.The weight loss rate of polyethylene,which has been treated by MP1-1 for 14 days,is 0.77%.There are obvious pits and holes on the surface of polyethylene,and the active functional groups such as carbonyl and ether bonds are introduced there.Optimizing the microwave-hydroxylamine compound mutagenesis combined with fermentation conditions can enhance the laccase-producing capacity of Trichoderma asperellum,which lays a good foundation for the industrial application of Trichoderma asperellum.
Trichoderma asperellum / optimization of fermentation conditions / mutagenesis / laccase
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河南省科技研发计划联合基金(245101610081)
河南省科技研发计划联合基金(225101610054)
国家自然科学基金(32201414)
省部共建小麦玉米国家重点实验室开放基金(SKL2023KF08)
河南省本科高校青年骨干教师培养计划(2025GGJS120)
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