中草药提取物对香蕉镰刀菌枯萎病病原菌的抑制作用

Inhibition of Chinese Herb Extracts Against Fusarium oxysporum f.sp.Cubense

本研究测试了123种常见中草药提取物对香蕉镰刀菌枯萎病病原菌的抑菌作用。结果表明,供试提取物100倍稀释液对菌株B1的菌丝生长和孢子萌发的抑制作用在50%以上的分别有15种和14种;对菌株B2的菌丝生长和孢子萌发抑制作用在50%以上的提取物分别有7种和9种。进一步测试发现,经过200倍稀释,只有丁香提取物和厚朴提取物对菌株B1的菌丝生长和孢子萌发抑制作用均达到50%以上。丁香提取物对菌株B1和菌株B2菌丝生长的抑制中浓度分别为3396.31μg/mL和3375.87μg/mL。

Extracts of 123 common Chinese herbs diluted 100 times were tested for their inhibitory effects against 2 isolates of Fusarium oxysporum f. sp. Cubense. The extracts from 15 species and 14 species of Chinese herbs were found to inhibit mycelia growth and spores germination of F. oxysporum isolate B1 by more than 50 % respectively, and 7 species and 9 species of Chinese herbs had an over 50 % inhibitory rate against mycelia growth and spores germination of F. oxysporum isolate B2 separately. The extracts from Flossyzygii aromatici and Magnolia offwinalis Rehd.et Wils were the only two having more than 50 % inhibitory effect against mycelia growth and spores germination of F. oxysporum isolate B1. The extract from F. aromatici was the only one that had more than 50 % inhibitory effect against mycelia growth and spores germination of F. oxysporum isolate B2. The 50 % effective concentrations（EC50） of the extract of F. aromatici against mycelia growth of the isolates B 1 and B2 were 3 396.31 μg/mL and 3 375.87 μg/mL, respectively.