Describe5 marksChallenge
An experiment is conducted using leaves from a well-watered plant and a plant that has been deprived of water for 48 hours. Microscopic examination of the lower epidermis reveals that the stomata of the water-deprived plant are closed, while those of the well-watered plant are open. Describe the sequence of events at the cellular level, starting with the detection of water shortage and ending with stomatal closure. In your answer, include the roles of abscisic acid (ABA) and calcium ions.