Which cell has maximum diffusion pressure deficit ?

Options

A. (a) Flaccid cell
B. (b) Turgid cell
C. (c) Prokaryotic cell
D. (d) Eukaryotic cell

Answer

To determine which cell has the maximum diffusion pressure deficit (DPD), we need to understand the concept of DPD and how it varies under different conditions of osmosis in plant cells.

### Step-by-Step Solution:

1. **Understanding Diffusion Pressure Deficit (DPD)**:
- DPD is defined as the difference between the osmotic pressure (OP) of a solution and the turgor pressure (TP) of the cell.
- The formula for DPD is:
\[ \text{DPD} = \text{OP} - \text{TP} \]

2. **Analyzing Different Cell Conditions**:
- **Plasmolyzed Cells**: In this condition, the cell loses water and the turgor pressure becomes negative. Therefore, DPD is calculated as:
\[ \text{DPD} = \text{OP} + |\text{TP}| \]
This results in a maximum DPD because the turgor pressure is effectively subtracted as a negative value.

- **Flaccid Cells**: In flaccid cells, the turgor pressure is zero. Thus, the DPD is equal to the osmotic pressure:
\[ \text{DPD} = \text{OP} \]
This results in a lower DPD compared to plasmolyzed cells.

- **Turgid Cells**: In turgid cells, the osmotic pressure is equal to the turgor pressure. Therefore, the DPD is:
\[ \text{DPD} = \text{OP} - \text{TP} = 0 \]
This indicates that there is no deficit in diffusion pressure.

3. **Comparing DPD in Different Conditions**:
- From the analysis, we can conclude:
- Maximum DPD occurs in plasmolyzed cells.
- Flaccid cells have a moderate DPD.
- Turgid cells have a DPD of zero.

4. **Identifying the Correct Answer**:
- The question provides options: flaccid cell, turgid cell, prokaryotic cell, and eukaryotic cell.
- Since the maximum DPD is observed in plasmolyzed cells, and flaccid cells have a higher DPD than turgid cells, the correct answer among the given options is **flaccid cell**.

### Final Answer:
**Flaccid Cell** has the maximum diffusion pressure deficit.

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