The simple phenomenon of shrinkage of the protoplasm from the cell wall under the action of some strong solution ( than that of the cell sap ) is due to decrease in

Options

A. root pressure
B. turgor pressure
C. DPD
D. osmotic pressure

Answer

**Step-by-Step Solution:**

1. **Understanding the Context**: The question describes a phenomenon where the protoplasm shrinks away from the cell wall when a plant cell is placed in a solution that has a higher concentration of solutes compared to the cell sap. This situation typically occurs in a hypertonic solution.

2. **Identifying the Type of Solution**: A hypertonic solution has a higher concentration of solutes than the cell sap. When a cell is placed in such a solution, water moves out of the cell to balance the concentration of solutes.

3. **Movement of Water**: Due to osmosis, water will move from an area of lower solute concentration (inside the cell) to an area of higher solute concentration (the surrounding solution). This results in a loss of water from the cell.

4. **Effect on the Cell**: As water leaves the cell, the volume of the protoplasm decreases, leading to the shrinkage of the protoplasm away from the cell wall. This phenomenon is known as plasmolysis.

5. **Role of Turgor Pressure**: Turgor pressure is the pressure exerted by the fluid (in this case, water) inside the cell against the cell wall. When water leaves the cell, the turgor pressure decreases. This decrease in turgor pressure is what causes the protoplasm to shrink away from the cell wall.

6. **Conclusion**: The shrinkage of the protoplasm from the cell wall is primarily due to the decrease in turgor pressure. Therefore, the correct answer to the question is "turgor pressure."

**Final Answer**: The shrinkage of the protoplasm from the cell wall under the action of a strong solution is due to a decrease in turgor pressure.

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