温度、pH 值和水势对四种具有病害生物防治潜力真菌生长的影响。

Effects of temperature, pH and water potential on growth of four fungi with disease biocontrol potential.

机构信息

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出版信息

World J Microbiol Biotechnol. 1991 Jul;7(4):494-501. doi: 10.1007/BF00303376.

Abstract

Effects of temperature, pH and water potential on blomass production or hyphal extension of Gliocladium virens (G20) and three Trichoderma isolates were determined in vitro. Optimum blomass production occurred between 20 and 30°C and at pH ranges between 4.6 and 6.8. Two isolates of T. viride grew at 5°C and G. virens grew at 35°C but no isolates grew at 40°C. Hyphal extension rates and conidial germination of all fungi declined with decreasing water potential over the range -0.7 to -14.0 MPa. In general, growth rates for each isolate were lower on potato/dextrose agar with water potential adjusted with polyethylene glycol than when adjusted with NaCl or glycerol. No mycelial growth or spore germination occurred on agar at-14.0 MPa.

摘要

在体外条件下，研究了温度、pH 值和水势对绿色木霉（G20）和 3 株木霉分离株的生物量产生或菌丝延伸的影响。最佳生物量产生发生在 20 至 30°C 和 pH 值在 4.6 至 6.8 之间。两株绿木霉分离株在 5°C 下生长，而绿色木霉在 35°C 下生长，但没有分离株在 40°C 下生长。随着水势从-0.7 至-14.0 MPa 的降低，所有真菌的菌丝延伸率和分生孢子萌发率均下降。一般来说，在用聚乙二醇调整水势的马铃薯/葡萄糖琼脂上，每个分离株的生长速度低于用 NaCl 或甘油调整水势的情况。在-14.0 MPa 的琼脂上没有菌丝生长或孢子萌发。