What is stomatal transpiration?
1 Answer
The process of the loss of water in the form of vapors through the stomata present on the epidermal surface of the leaf, green stem, etc. is called stomatal transpiration. It is the most common type of transpiration. It is about 50-97% of total transpiration, it occurs during the daytime until the stomata open. During the process of stomatal transpiration, the mesophyll tissue lying in the leaves loses water to the intercellular spaces. So the mesophyll tissues become unsaturated and draw water from the adjacent mesophyll tissues which also absorb water from the xylem tissues of the leaves. The intercellular spaces become saturated after getting water from the xylem tissues of the leaves. The intercellular spaces become saturated after getting water from the mesophyll tissues. Intercellular space losses water to the outer environment through the stomata by diffusion.
The arrows show the movement of water.