Presence of stomata on the under surface of dorsiventral leaf is a mechanism of

Options

A. Reduction in transpiration
B. Protection from dust
C. Proper regulation of transpiration
D. Increase in transpiration

Answer

**Step-by-Step Solution:**

1. **Understanding Stomata**: Stomata are small openings on the surface of leaves that allow for gas exchange (CO2 in, O2 out) and transpiration (loss of water vapor).

2. **Location of Stomata**: In dorsiventral leaves (which have a distinct upper and lower surface), stomata are primarily located on the lower surface (underside) of the leaf. This anatomical feature is significant for various physiological processes.

3. **Function of Stomata**: The primary function of stomata is to facilitate transpiration, which is the process of water vapor loss from the plant to the atmosphere.

4. **Reduction of Transpiration**: By having stomata on the underside of the leaf, plants can reduce direct exposure to sunlight. This minimizes the heat that can cause excessive water loss through transpiration.

5. **Conclusion**: The presence of stomata on the undersurface of dorsiventral leaves is primarily a mechanism for the reduction of transpiration, as it helps to regulate water loss while still allowing for gas exchange.

**Final Answer**: The correct option is **a. Reduction in transpiration**.

---