Question

Suction pressure of cell is

• A. Equal to wall pressure
• B. Equal to turgor pressure
• C. Equal to D.P.D.
• D. Osmotic pressure

Answer 1

The correct option is C Equal to D.P.D.

The difference between the diffusion pressure of the solution and its solvents at particular atmospheric conditions is called Diffusion Pressure Deficit (DPD). DPD is also known as suction pressure.

DPD/SP = OP-WP

But, WP=TP

So, DPD = OP-TP.

This it is not obvious that DPD of plant cells is not directly proportional to their OP but depend on both OP and TP.

So the correct option is "Equal to DPD".