Dry weight of leaf is maximum during

Options

A. Morning
B. Noon
C. Afternoon
D. Night.

Answer

**Step-by-Step Solution:**

1. **Understanding Dry Weight**: Dry weight of a leaf refers to the weight of the leaf when it has no or minimal water content. It is an important measure as it reflects the actual biomass of the leaf.

2. **Transpiration Process**: Transpiration is the process by which plants lose water in the form of water vapor through small openings called stomata. This process is crucial for maintaining water and nutrient flow within the plant.

3. **Timing of Transpiration**: The rate of transpiration varies throughout the day. It is generally highest during the afternoon due to increased temperature and sunlight, which promote evaporation of water from the leaf surface.

4. **Effect on Leaf Weight**: Since the rate of transpiration is highest in the afternoon, leaves lose the most water during this time. As a result, the dry weight of the leaves will be at its maximum during the afternoon when the water content is at its lowest.

5. **Conclusion**: Therefore, the dry weight of the leaf is maximum during the afternoon.

**Final Answer**: The dry weight of the leaf is maximum during the afternoon.

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