Plants have their own system to resist microorganisms. The physiological basis of disease resistance is mainly manifested in three points:
1. Strengthening oxidase activity. For example, breathing can be strengthened to reduce illness. When pathogenic bacteria invade the plant, the plant's vigorous respiration can oxidize and decompose the toxin into carbon dioxide and water, or convert it to non-toxic substances. When the pathogen invades the wound caused by the plant, respiration can promote the formation of a pathogen. cork layer near the wound. Allows wounds to heal quickly, separate healthy tissues from injured parts and prevent the development of wounds, inhibit the hydrolase activity of pathogenic bacteria.
2. Some pathogenic fungi can only live in living cells and cannot survive in dead cells. Once plants are exposed to pathogenic bacteria, they will develop a broad-spectrum defense to resist the invasion of pathogenic bacteria. For example, it promotes necrosis of its own tissues
3. Produce inhibitory substances. Such as defensins, lignin, disease resistant proteins, elicitors, etc.