126种中草药提取物对2种植物病原真菌的抑制作用

以禾谷镰刀菌(Fusarium graminearum)和立枯丝核菌(Rhizoctonia solani)为供试菌种,中草药提取物样品供试质量浓度为0.01g/ml,用生长速率法对126种中草药的乙醇提取物进行了室内抑菌活性测试。结果表明,在供试的126种中草药提取物中,16种提取物对禾谷镰刀菌菌丝生长具有显著的抑制作用,且抑菌作用大于50%,甘草提取物的抑菌活性达86.99%。将这16种抑菌活性较好的提取物稀释200倍进一步测试,有7种提取物抑菌作用大于50%。供试的126种中草药提取物中有23种提取物对立枯丝核菌菌丝生长具有显著的抑制作用,且抑菌作用大于50%,鸡冠花提取物的抑菌率达到100%。二次筛选后仍有8种提取物的抑菌活性大于60%,其中鸡冠花提取物的抑菌率仍为100%。

Inhibition of 126 Kinds of Chinese Herb Extracts Gainst Two Plant Pathogenic Fungi

The extracts from hundred and twenty six species of Chinese herbs(CHEs) were tested for the antifungal activities against the mycelium growth of Fusarium graminearum and Rhizoctonia solani.The concentration 0.01 g/ml was used in the primary screening.The results showed that 16 species of CHEs expressed significant inhibitory effects against the mycelium growth of Fusarium graminearum,and the inhibitory effect was over 50%.Inhibitory rate of Glycyrrhiza yralensis extract reached up to 87%.Inhibitory rates of 7 species of CHEs were more than 50% after diluted 200 times at the secondary test.At the primary screening test,23 species of CHEs had significant inhibitory effects against the mycelium growth of Rhizoctonia solani with the inhibitory rates over 50%.Inhibitory effect of Celosia cristata L.extract reached up to 100%.The inhibitory effects of 8 species in these 23 species of CHEs were still higher than 60% and the effect of Celosia cristata L.extract did not reduce at the secondary screening test.