当前位置: 首页 > 文章 > 球孢白僵菌胞外蛋白酶和几丁质酶活性与对亚洲玉米螟毒力的相关性分析 华中农业大学学报 2005,24 (4) 364-368
Position: Home > Articles > Correlation of Extracellaluar Protease ,Chitinase Activities and Virulence to Ostrinia furnacalis Journal of Huazhong Agricultural University 2005,24 (4) 364-368

球孢白僵菌胞外蛋白酶和几丁质酶活性与对亚洲玉米螟毒力的相关性分析

作  者:
刘智辉;陈守文;郭志红;喻子牛
单  位:
华中农业大学生命科学技术学院,农业微生物学国家重点实验室,微生物农药国家工程研究中心,华中农业大学生命科学技术学院,农业微生物学国家重点实验室,微生物农药国家工程研究中心,沈阳国家森林病虫害防治总站,华中农业大学生命科学技术学院,农业微生物学国家重点实验室,微生物农药国家工程研究中心 武汉430070,武汉430070,沈阳110034,武汉430070;华中农业大学生命科学技术学院
关键词:
球孢白僵菌;胞外蛋白酶;胞外几丁质酶;亚洲玉米螟;毒力相关性
摘  要:
以振荡摇瓶培养法培养17株球孢白僵菌(Beauveriabassiana),分析其总胞外蛋白酶和几丁质酶的产生水平,同时用这些菌株的分生孢子粉作为样品,用人工饲养的亚洲玉米螟5d龄幼虫作为试虫,作毒力生物测定。并分析各个因素之间的相关性,验证各个酶活性指标作为毒力的生物测定的替代或者补充指标的可能性。结果表明,菌株间同代毒力、酶活之间的差异比较大,LT50的变化范围为4.82~10.06d,胞外蛋白酶活性的变化范围是0.86×10-2~3.66×10-2IU/mL,胞外几丁质酶活性的变化范围是0.012~1.47IU/mL。将后二者分别与各个菌株对玉米螟的LT50进行回归分析,结果发现胞外蛋白酶活性和胞外几丁质酶活性以及测定胞外蛋白酶活性时的干物质增重3个指标,与感染的亚洲玉米螟幼虫的死亡率及LT50的相关性都不显著,不能作为对亚洲玉米螟毒力的生物测定的替代或补充指标。
译  名:
Correlation of Extracellaluar Protease ,Chitinase Activities and Virulence to Ostrinia furnacalis
作  者:
Liu Zhihui 1) Chen Shouwen 1) Guo Zhihong 2) Yu Ziniu 1)( 1)College of Life science and Technology ,Huazhong Agricultural University,State Key Laboratory of Agricultural Microbiology, National Engineering Research Center for Microbial Pesticides, Wuhan 430070,China; 2)General Station of Forest Pest Management,State Foresty Administration,Shenyang 110034,hina)
关键词:
Beauveria bassiana; extracellular protease; extracellular chitinase; Ostrinia furnicalis(guenee); virulence correlation
摘  要:
The extracellular protease and chitinase of 17 Beauveria bassiana that cultured in shaking flask were analyzed.Furthermore,virulence assay of each strain was examined with its suspension of 10 7conidia per mL on 5-day-age Ostrinia furnicalis(guenee) .In the assay of the enzymes,N-Acetyl-D-glucosamine and L-tyrosine were used as a substrate to measure the abilities of protease and chitinase.Among the isolates assayed,the estimates of LT_ 50,protease and citinase activities were 4.82~10.06 d, 0.86×10 -2~3.28×10 -2 IU/mL,0.12×10 -2~1.47×10 -2 IU/mL.Based on the determination coefficient(r 2)from the regressions, protease and citinase activities and dry matter incrument could not replace conventional virulence assay method.

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