What is the transpiration pull theory?

Other articles where Transpiration pull is discussed: …for by a mechanism, called transpiration pull, that involves the evaporation of water from leaves. Thus, the explanation for the upward movement of sap in trees is also called the transpiration-cohesion hypothesis. read more

A: Transpiration pull theory is the proposed mechanism by which trees draw water through their roots. Transpiration occurs when the leaves of a tree allow water to exit into the air by means of tiny holes called stomata. read more

Transpiration Pulls. It is the pulling force responsible for lifting the water column. As water is lost in form of water vapour to atmosphere from the mesophyll cells by transpiration, a negative hydrostatic pressure is created in the mesophyll cells which in turn draw water from veins of the leaves. read more

Transpirational pull theory proposes that the evaporation of water from the leaves of plants pulls water like a chain up the xylem through cohesion. read more