In the sensitive plant, movement occurs at a point different from the point of touch. The communication of touch-related information utilizes electrical-chemical means among cells.
What is the difference between the point of touch and the point where movement occurs in the sensitive plant?
Share
In the sensitive plant (Mimosa pudica), the point of touch and the point where movement occurs are not the same due to the propagation of an action potential. When one part of the plant is touched, specialized cells called pulvini at the base of leaflets detect the stimulus. The action potential then travels along the length of the leaflet before reaching the pulvinus. Movement occurs at the pulvinus, leading to rapid leaf folding. This delay between the point of touch and the actual movement allows the plant to localize the response to the specific area of disturbance, optimizing its defensive reaction against potential threats.