H2O2 and peroxidase could be inspected in the wounds, stoma, and penetration sites on both resistant and susceptible host leaf tissues by using DAB staining method.

• 采用DAB原位活体检测法，在抗、感寄主的组织伤口、气孔、侵染点均检测到H_2O_2、过氧化物酶活性。