Question

Which of the following is zero in fully turgid cell?

• A. DPD and ${\Psi }_P$
• B. DPD and ${\Psi }_W$
• C. OP and ${\Psi }_W$
• D. TP and ${\Psi }_P$

Answer 1

Answer: (A)

DPD and ${\Psi }_P$

DPD is the difference in the diffusion pressure of the solution and a pure solvent when both are subjected to the same atmospheric pressure. When the increasing turgor pressure becomes equal to the decreasing osmotic pressure, the entry of the water into the cell would stop. This is called the turgid condition of the cell. This is when DPD equals zero.

Pressure potential is the positive pressure developed in the system due to the osmotic entry of water into it. It is negative in plasmolysed cell and xylem vessel and zero for the turgid cell.

Hence, the correct answer is 'DPD and ${\Psi }_P$'