丁香等3种中草药提取物抑制植物病原真菌的研究

以丁香、虎杖和百部的丙酮提取物为材料,测定了其对8种植物病原真菌的抑制活性。结果表明:在供试浓度为0.05 g/ml时,丁香提取物对所有供试菌的病原真菌菌丝生长抑制作用效果最好,抑制率均为100%;虎杖提取物抑菌活性次之,对6种供试菌抑制率均在70%以上,其中对苹果褐腐病菌表现出强烈的抑制作用,抑制率为100%,对小麦赤霉病菌和小麦纹枯病菌抑制率均在80%以上;百部提取物仅对小麦纹枯病菌表现出较好的抑制作用。在供试浓度为0.1 g/ml时,丁香提取物对杨树溃疡病菌孢子萌发抑制作用效果最好,抑制率为100%;虎杖提取物对孢子萌发抑制活性次之,抑制率为94%。丁香和虎杖提取物可作为植物源抗真菌剂进一步深入研究。

Study on the Anti-fungi Activity of the Extract from Three Kinds of Chinese Herb.

Three kinds of Chinese herbs,including Syzygium aromaticum,Polygonum cuspidatum and Stemona sessilifolia,were used as the experiment materials to determine their inhibitory activity against 8 plant pathogens.The results showed that the extracts of Syzygium aromaticum had 100% inhibiting rate to all 8 kinds of plant pathogens,the extracts of Polygonum cuspidatum also showed good anti-fungal properties with more than 70% inhibiting rate to at least 6 kinds of plant pathogens and the highest inhibiting rate achieving at 100% against the Valsa mali.The inhibiting rate of the extracts of Syzygium aromaticum to the growth of the spore of Dothiorella gregaria reached 100% at the concentration of 0.1 g/ml,while that of the Polygonum cuspidatum extracts was 94%.