Question

Wilt diseases caused by vascular pathogens can make plants wilt even when sufficient water is present in the soil. What physiological or structural effect of the pathogen primarily causes this characteristic symptom?

Q: Answer-Wilt diseases caused by vascular pathogens can make plants wilt even when sufficient water is presen...

Wilt diseases produce their characteristic wilting symptom primarily because the pathogen blocks or damages the plants water-conducting xylem vessels either through direct fungal growth within the vessels or through the plants own defensive gum and tylose formation in response to infection, impairing the normal upward movement of water from the roots to the shoots and leaves, causing the plant to wilt even when adequate soil moisture is actually present.