Question

Describe the most widely accepted theory of upward translocation of water in plants ? Justify the acceptability of the theory

Answer 1

Answer:

Translocation in vascular plants means the movement of organic molecules and some mineral ions. Movement of water from the soil to the leaves occurs in xylem vessels as the result of Transpiration. ... Leaves photosynthesise, making sugars. Water moves into the sugar-laden sieve-tube cells with sugar by osmosis.

Explanation:

But, the most widely accepted theory is Dixon's theory of ascent of sap. According to this theory the water present in the leaves is continuously evaporated by sunlight falling over them. The process of evaporation of water from the leaves of a plant is called transpiration.

Answer 2

The most widely used theory is Dixon theory of ascent of sap also called as cohesion theory.

EXPLANATION:

This theory is based on cohesion between water molecules. This forms the continues water column in to xylem vessel of the plant via root top. The strong 'mutual force of attraction' or cohesive force in water molecules, hence this remains as continues water column in 'xylem'. There is uplift of water which is also called as transcription pull.