Under given suitable conditions, the DPD will be more than OP

Options

A. OP is equal to TP
B. OP is less than TP
C. OP is greater than TP
D. TP is negative

Answer

To solve the question regarding the conditions under which the Diffusion Pressure Deficit (DPD) is greater than the Osmotic Pressure (OP), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- **DPD (Diffusion Pressure Deficit)**: This is a measure of the difference between the diffusion pressure of water in the surrounding medium and that in the plant cell.
- **OP (Osmotic Pressure)**: This is the pressure required to prevent the flow of water into a solution via osmosis.
- **TP (Turgor Pressure)**: This is the pressure exerted by the fluid (usually water) inside the central vacuole against the cell wall.

2. **Mathematical Relationship**:
- The relationship between these pressures can be expressed as:
\[ DPD = OP - TP \]
- This equation indicates that DPD is the difference between osmotic pressure and turgor pressure.

3. **Analyzing Conditions**:
- For DPD to be greater than OP, we can rearrange the equation:
\[ DPD > OP \implies OP - TP > OP \]
- This simplifies to:
\[ -TP > 0 \implies TP < 0 \]
- Therefore, for DPD to be greater than OP, turgor pressure (TP) must be negative.

4. **Evaluate Options**:
- **Option 1**: OP = TP → DPD = 0 (Incorrect)
- **Option 2**: OP < TP → DPD would be negative (Incorrect)
- **Option 3**: OP > TP → DPD would be positive but not necessarily greater than OP (Incorrect)
- **Conclusion**: The correct condition for DPD to be greater than OP is when TP is negative.

### Final Answer:
The condition under which DPD is greater than OP is when the Turgor Pressure (TP) is negative.