Explain pulsation theory of J.C. Bose.

Explanation

Bose invented an instrument called Crescograph, which consists of an electric probe connected to a galvanometer. When a probe is inserted into the inner cortex of the stem, the galvanometer showed high electrical acivity. Bose believed a rhythmic pulsating movement of inner cortex like a pump ( similar to the beating of the heart ) is responsible for the ascent of sap. He concluded that cells associated with xylem exhibit pumping action and pumps the sap laterally into xylem cells.