Water soaked appearance of leaves due to sulphur dioxide pollution is caused by

Options

A. Destruction of chlorophyll
B. Damage to membranes
C. Both A and B
D. Corrosive action over metals.

Answer

**Step-by-Step Solution:**

1. **Understanding Sulphur Dioxide Pollution**: Sulphur dioxide (SO2) is a common air pollutant that can have detrimental effects on plant life. It is primarily produced from industrial processes and the burning of fossil fuels.

2. **Impact on Photosynthesis**: Sulphur dioxide affects the process of photosynthesis in plants. Photosynthesis is crucial for plants as it allows them to convert light energy into chemical energy, using carbon dioxide and water.

3. **Stomatal Function**: The presence of sulphur dioxide can lead to the opening of stomata (tiny openings on the leaf surface) which are essential for gas exchange. However, excessive opening can lead to water loss.

4. **Membrane Damage**: Sulphur dioxide can also cause damage to the cell membranes of plant cells. This damage can disrupt normal cellular functions and lead to the breakdown of chlorophyll, the green pigment essential for photosynthesis.

5. **Excessive Transpiration**: Due to the damage caused by sulphur dioxide, plants may experience excessive transpiration (loss of water vapor from plant surfaces). This can result in a water-soaked appearance of the leaves, as the plant struggles to maintain its water balance.

6. **Conclusion**: The water-soaked appearance of leaves due to sulphur dioxide pollution is primarily caused by the destruction of the membrane and the damage to chlorophyll, leading to excessive transpiration.

**Final Answer**: The water-soaked appearance of leaves due to sulphur dioxide pollution is caused by the destruction of the membrane and damage to chlorophyll.

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