Question

Explain Transpiration in detail.

Answer 1

Evaporation of water molecules from the cells of a leaf and other exposed parts of the plant creates a suction which pulls water from the xylem cells of roots. The loss of water in the form of vapor from the aerial parts of the plant is known as transpiration. Thus, transpiration helps in the absorption and upward movement of water and minerals dissolved in it from roots to the leaves. It also helps in temperature regulation. The effect of root pressure in transport of water is more important at night. During the day when the stomata are open, the transpiration pull becomes the major driving force in the movement of water in the xylem.