The extracts of Xanthium sibiricum could result in leakage of inclusion of mycelium and change of penetrability of cell membrane so as to make conductivity increase.

• 苍耳提取物能引起番茄灰霉菌菌丝细胞膜透性发生变化，造成菌丝体内含物的渗漏，从而导致液体培养基电导率增；