Flaccid Cell

A flaccid cell is a plant cell that is in a state of low water pressure, resulting in a loss of turgor pressure. This can occur when a plant does not receive enough water or when water is lost through transpiration. In a flaccid cell, the cell membrane pulls away from the cell wall, causing the cell to lose its shape.

DPD and OP

DPD stands for pressure potential, which is the physical pressure on a solution. OP stands for osmotic potential, which is the potential of a solution to move water across a membrane due to differences in solute concentration. Both DPD and OP contribute to the total water potential of a solution.

TP

TP stands for total water potential, which is the overall potential of a solution to move water. TP is equal to the sum of DPD and OP.

Correct Statement

The correct statement with respect to a flaccid cell is: DPD = 0.

Explanation: In a flaccid cell, the cell is losing water and therefore has a low water potential. However, because the cell is not under any external pressure, the pressure potential (DPD) is zero. Therefore, the total water potential of a flaccid cell is equal to the osmotic potential (OP), which is negative due to the loss of water.

Summary

- A flaccid cell is a plant cell with low water pressure and loss of turgor pressure.
- DPD stands for pressure potential, OP stands for osmotic potential, and TP stands for total water potential.
- The correct statement with respect to a flaccid cell is DPD = 0, as there is no external pressure on the cell. The total water potential is equal to the negative osmotic potential.

The value of DPD is calculated as the algebraic difference between osmotic pressure and turgor pressure. In a fully turgid cell, the value of DPD is equal to zero and turgor pressure is numerically equal to osmotic pressure. In a flaccid cell the turgor pressure is zero and hence DPD is equal to osmotic pressure.
So, (DPD = OP).
Hope its help...