Question

Which one of the following theories for ascent of sap was proposed by eminent Indian Scientist J.C.Bose

• A. Pulsation theory
• B. Transpiration Pull theory
• C. Root pressure theory
• D. Atmospheric pressure theory

Answer 1

The correct option is A Pulsation theory

A common vital force theory about the ascent of sap was put forward by J.C. Bose (1923). It is called the pulsation theory. The theory believes that the innermost cortical cells of the root absorb water from the outer side and pump the same into xylem channels. So the correct option is 'Pulsation theory'.