【摘要】 环境pH值是影响昆虫病原真菌生理与生态过程的重要因子之一,本试验用Czapek培养基,研究了9个pH梯度对昆虫病原真菌粉虱座壳孢的孢子萌发和菌丝生长的影响。结果表明,接种24h后,不同pH条件下的孢子萌发率有(极)显著差异,pH=6条件下的孢子萌发率为100％,其他条件下随着pH的升高,孢子萌发率逐渐降低；pH =7时培养7d后菌丝生长最快,其干重达1．14g,其次是pH=8条件下的菌丝干重达0．92g。本试验表明,最有利于孢子萌发和菌丝生长的pH值分别为6和7。更多还原

【Abstract】 pH in environment is one of the important factors affecting the physiological and ecological processes of entomopathogenic fungi.Influence of nine pH levels on spore germination and hyphal growth of entomopathogenic fungus,Aschersonia aleyrodis,were investigated on Czapek medium in the experiment.Results indicated that sig- nificant difference in spore germination was observed among different pH.Spore germination rate reached 100% at pH6 in 24 hours after inoculation and gradually decreased with the increasing in other pH values.Seven days after incubation,hyphal growth was the fastest and dry weight of mycelia was 1.14 grams at pH7 and 0.92 grams at pH8.Furthermore,it was demonstrated that the optimal pH for spore germination and hyphal growth was 6 and 7, respectively.更多还原