云南常见鹅膏毒素粗提物对几种植物病原真菌的抑制活性研究

摘要

Methyl alcohol was used to extract toxin from 5 common species in Amanita [ Amanita virgineoides Bas, A.rufofer-ruginea Hongo, A.hemibapha subsp.hemibapha, A.fritillaria ( Berk.) Sacc, A.manginiana sensu W.F.Chiu] in Yunnan, and the inhibitory activities of these toxin extracts to the mycelial growth of 3 kinds of plant pathogenic fungi were studied.The results in-dicated that the toxin crude extracts from A.rufoferruginea and A.virgineoides had stronger inhibitory effects on the mycelial growth of Alternaria alternate, Rhizopus stolonifer, and Fusarium avenaceum, and their EC50 values varied from 13.2138 g/L to 25.7256 g/L;the toxin crude extracts from the other 3 amanitas had very weak inhibitory effects on the mycelial growth of above 3 kinds of plant pathogenic fungi.%研究了白刺头鹅膏、土黄鹅膏、隐花青鹅膏、红黄鹅膏和格文鹅膏甲醇提取物对3种植物病原真菌菌丝生长的抑制作用。结果表明：土黄鹅膏和白刺头鹅膏毒素粗提物对烟草赤星病菌（ Alternaria alternate）、魔芋软腐病菌（ Rhizopus stolonifer）、蚕豆基腐病菌（Fusarium avenaceum）菌丝生长的抑制作用较强，EC50为13．2138～25．7256 g／L；其他3种鹅膏甲醇提取物对上述3种真菌菌丝生长的抑制作用很弱。