Question

Fill in the blanks:

Transpiration pull theory was given by ___________ in (1894).

Answer 1

Transpiration pull :

1. Transpiration pull is the most widely accepted theory for the ascent of sap from roots to the shoot system.
2. It is also called the cohesion tension theory.
3. This mechanism was proposed by Dixon and Jolly in 1894.
4. Tension or negative pressure in the water column of xylem channels results in this upward pull.
5. Since it develops due to transpiration, it is called transpiration pull.

Final Answer: The transpiration pull theory was given by Dixon and Jolly in 1894.