Question

What is responsible for guttation?

(a) Osmotic pressure (b) Root pressure

(c) Suction pressure (d) Capillarity

Answer 1

Guttation is the secretion or exudation of drops of xylem sap on the tips or edges of leaves. Some vascular plants, like grasses, exhibit this behaviour. When water accumulates in a plant, it creates a slight root pressure. This root pressure causes the exudation. It mostly happens when transpiration is suppressed due to high relative humidity, such as during the night.

Option b is correct