Question

Match the columns and identify the correct combination :

Answer 1

Mass flow hypothesis is also known as pressure flow hypothesis was proposed by a German plant physiologist Ernst Munch in 1930. This hypothesis explains the movement of sap through the phloem.

Relay pump theory proposed by Godlewski in the year 1884. This theory states that ascent of sap takes place because rhythmatic change in the osmotic pressure of xylem parenchyma and medullary rays. This results in bringing about a pumping action of water in upward direction.

Transpiration pull theory was proposed by Dixon and Joly in the year 1894. The theory has two fundamental features such as (i) cohesion of water and adhesion between water and xylem tiusses, (ii) Transpiration pull. This theory explains plants which is responsible for the movement of water column upward.

Pulsatile movement theory, is also known as pulsation theory was proposed by J.C. Bose in the year 1923. This theory opinions that cells of the innermost layer of cortex, present outside the endodermis, are in rhythmic pulsation. Such pulsations are responsible for pumping the water in upward direction.

So, the given options are correct.