Culture Condition Optimization of Three Actinomyces Mixed Fermentation Against Phytophthora infestans and Mechanism

doi:10.3969/j.issn.1000-1565.2010.01.017

Abstract

Abstract: In order to aquire the stable and more effective control for potato late blight, three actinomyces strains which had significant inhibitive function on the growth of Phytophthora infestans, isolated from soil were studied to evaluate their mixed fermentation condition. There were no obvious antagonistic among the three actinomyces strains, and the best ferment combination mode was that NB8 was inoculated at first, NB11 and NB12 was inoculated 2 days later. The inhibitory rate reached 97.7%, and higher than that of any single fermentation. The inhibitory activity was the highest at natural pH and 28 ℃. The complex fermentation liquor had obvious inhibition on the pathogen, making them deformed and the sporangium breakaged abnormly.

Key words: actinomyces against pathogen, mixed fermentation, inhibitory medium

CLC Number:

Q945.8

JIANG Ji-zhi,LI Sha,WANG Hui-xian. Culture Condition Optimization of Three Actinomyces Mixed Fermentation Against Phytophthora infestans and Mechanism[J]. Journal of Hebei University (Natural Science Edition), 2010, 30(1): 78-82.

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