Abstract The heads of resistant cultivar (Sumai 3) and Susceptible cultivar (Fan 6) were inoculated with conidia of Fusarium graminearum at the late flowering stage.

• 由于植物受病原菌侵染后的生理改变，因寄主的种类或品种和病原种类或菌系(小种)组合不同而变化。