Explain how the xylem and stomata are involved in the process of transpiration.

Evaporation of water occurs through stomata pores and water moves from stem to stomata through xylem.

Explanation:

Water moves from an area of higher total water potential to an area of higher water total potential. Remember the maximum water potential is zero and more the solution is concentrated the less will be water potential.

Transpiration is the main driving force for the movement of water through xylem. The loss of water through leaves creates a negative pressure at leaves that pulls the water from stem to leaves through xylem. Transpiration occurs through Stomata. When the stomata are open for intake of CO2, at the same time the water will evaporate.

Basically transpiration is set up when sunlight hit the surface of the leaf> which causes the leaf to loose water by evaporation. The process of evaporation from the leave surface is called transpiration. certain pores well distributed on both surfaces of the leaf called stoamta are the channels fro evaporation of water vapour in leaf. They are also for exchange of Oxygen with Carbodioxide.

As a result of constant loss or water from the leaf, the water potential gradient of the leaf internal layer drops compare to the surrounding environments. This decreases through out the plants. However the water potential gradient of the surrounding soil is greater than the the plants inner layer.

Consequently, water moves through the forces of adhesion cohesion, capillarity through the roots of plants through the xylem tissue in the stem to reach the leaves for transpiration to continue.

The stomata regulate the process of transpiration by the opening and closing of its guard cells guiding the stoma while the Xylem tissues and trachieds serve as the vascular tissues for transport of water and minerals from the roots to the leaves to set - up transpiration

The basic function of transpiration it to cool the plants, because evaporation draws heat from plants to bring about cooling, and to stimulate water movement through xylem in plants