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首页> 外文期刊>African Journal of Biotechnology >Pathogenicity of Beauveria bassiana and production of cuticle-degrading enzymes in the presence of Diatraea saccharalis cuticle
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Pathogenicity of Beauveria bassiana and production of cuticle-degrading enzymes in the presence of Diatraea saccharalis cuticle

机译：球白僵菌存在下球孢白僵菌的致病性和表皮降解酶的产生

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摘要

The sugarcane borer, Diatraea saccharalis, is one of the worst pests in Brazilian sugarcane crop, causing high levels of financial losses every year. Beauveria bassiana is an entomopathogenic fungus widely used in the biological control of several agricultural pests. The aims of this study were to: (1) evaluate the pathogenicity of? B. bassiana strains against? D. saccharalis ?(2) investigate the production of proteases and chitinase by B. bassiana in the presence? of the cuticle of sugarcane borer; and, (3) evaluate the relation between the production of enzymes and pathogenicity of the strains. All isolates tested were pathogenic to D. saccharalis and the mortality ranged from 36 to 88%. The production of enzymes was higher in the medium containing cuticle, showing that the process is stimulated by specific components found in the cuticle of the host. Pr1 activity was higher than Pr2 and both were produced at 24 h.? The highest production of chitinase was obtained at 96 h of culture for all strains tested. Levels of specific cuticle-degrading enzymes such as proteases correlated positively with specific virulence parameters. B. bassiana URM2915 showed promising features to be used in a biological control program of D. saccharalis.
机译：甘蔗蛀虫Diatraea saccharalis是巴西甘蔗作物中最严重的害虫之一，每年造成大量的经济损失。球孢白僵菌是一种昆虫病原真菌，广泛用于几种农业害虫的生物防治。这项研究的目的是：（1）评估其致病性。 B. bassiana菌株对吗？ D. saccharalis（2）研究了球孢白僵菌在存在的情况下蛋白酶和几丁质酶的产生。甘蔗bore的角质层; （3）评估酶的产生与菌株致病性之间的关系。测试的所有分离株均对糖衣原体有致病性，死亡率为36％至88％。含有角质层的培养基中酶的产生较高，表明该过程受到宿主角质层中特定成分的刺激。 Pr1的活性高于Pr2，两者均在24小时内产生。对于所有测试的菌株，在培养96小时时均获得最高的几丁质酶产量。特定表皮降解酶（例如蛋白酶）的水平与特定毒力参数呈正相关。球芽孢杆菌URM2915表现出可用于酿酒酵母生物防治程序的有前途的功能。

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