Labelled diagram of Movement of water during transpiration in a tree
The plant has an adequate supply of water, water lost through the stomata is replaced by water through the xylem vessels in the leaf. In fact, the evaporation of water molecules from the leaf cells creates a suction that pulls water from the xylem cells of the roots. The loss of water in the form of vapour from the aerial parts of a plant is known as transpiration Thus transpiration helps to dissolve and absorb water and minerals from the roots to the leaves. It also helps in temperature control. The effect of root pressure is more important in water transport at night. When the stomata are open during the day, the transpiration bridge becomes the major driving force in the movement of water through the xylem.
Discussion in video with function below –
