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食品研究与开发:2021,42(10):165-170
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金耳胞外酶代谢研究
(1.陕西理工大学陕西省食药用菌工程技术研究中心,陕西 汉中 723001;2.陕西理工大学生物科学与工程学院,陕西 汉中 723001)
Extracellular Enzyme Metabolism of Tremella aurantialba
(1.Shaanxi Provincial Engineering Research Center of Edible & Medicated Fungi,Shaanxi University of Technology,Hanzhong 723001,Shaanxi,China;2.School of Biological Science & Engineering,Shaanxi University of Technology,Hanzhong 723001,Shaanxi,China)
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投稿时间:2021-01-11    
中文摘要: 以金耳(Tremella aurantialba)菌种及其伴生菌毛韧革菌(Stereum hirsutum)菌株为材料,进行液体培养,研究毛韧革菌在纯培养及与金耳混合培养过程中纤维素酶、半纤维素酶、淀粉酶、果胶酶、蛋白酶和木质素酶的活性变化。结果表明,在液体培养过程中,毛韧革菌和混合菌丝除未检测到过氧化物酶外,其它胞外酶活性均呈现出一定的趋势变化。毛韧革菌胞外羧甲基纤维素酶、滤纸纤维素酶、半纤维素酶、淀粉酶、果胶酶、蛋白酶、漆酶、愈创木酚氧化酶和邻苯二酚氧化酶活性峰值分别出现在培养第 2、2、2、2、6、6、10、10、12 天,酶活力分别为 10.051、3.188、20.971、14.781、3.254、7.619、26、11、9 U/mL,混合菌丝上述胞外酶活性峰值分别出现在第 2、2、4、2、6、6、8、8、12 天,酶活力分别为 14.674、3.633、26.067、15.270、5.756、8.650、32、22、14 U/mL。比较分析,混合菌丝胞外酶活性在一定程度上要高于毛韧革菌的纯培养,说明混合培养时两者具有互作关系,可以提高对培养基质的降解利用能力。
中文关键词: 金耳  毛韧革菌  液体培养  胞外酶  酶活性
Abstract:The changes in activities of cellulose,hemicellulose,amylase,pectinase,protease,and lignin degradation enzymes of Stereum hirsutum cultured alone and with Tremella aurantialba during liquid culture were studied.Except for peroxidase,the enzymes were detected and their activities varied during liquid cultivation.During S.hirsutum culture,activities peaked on day 2 for carboxymethyl cellulose,filter paper cellulose,hemicellulose,and amylase,on day 6 for pectinase and protease,on day 10 for laccase and guaiacol oxidase,and on day 12 for catechol oxidase.Their respective activities were 10.051,3.188,20.971,14.781,3.254,7.619,26,11 U/mL and 9 U/mL.During mixed liquid culture with T.aurantialba,activities peaked on day 2 for carboxymethyl cellulose,filter paper cellulose and amylase,on day 4 for hemicellulose,on day 6 for pectinase and protease,on day 8 for laccase and guaiacol oxidase,and on day 12 for catechol oxidase.Their respective activities were 14.674,3.633,26.067,15.270,5.756,8.650,32,22 U/mL and 14 U/mL.Cocultured mycelia showed higher extracellular enzyme activity compared with pure culture conditions.The results indicate that the interaction in mixed strain cultivation increases the ability for substrate degradation.
文章编号:202110026     中图分类号:    文献标志码:
基金项目:陕西省科技创新项目(2019HBGC-19)
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