The type of transpiration observed in leaves

Options

A. Stomatal
B. Cuticular
C. Lenticular
D. both (1) and (2)

Answer

**Step-by-Step Solution:**

1. **Understanding Transpiration**: Transpiration is the process of water loss from plants, primarily through small openings called stomata, which are mostly found on the leaves.

2. **Types of Transpiration**:
- **Stomatal Transpiration**: This is the main type of transpiration occurring in leaves. It accounts for approximately 85% of the total water loss in plants. Stomata are tiny pores that allow water vapor to escape into the atmosphere.
- **Cuticular Transpiration**: This type occurs through the cuticle, a waxy layer that covers the leaves and stems. It accounts for about 1% to 3% of water loss. The cuticle helps reduce water loss by providing a barrier.
- **Lenticular Transpiration**: This occurs through lenticels, which are small openings found on the stems of woody plants. It accounts for about 1% of water loss and is not significant in leaves.

3. **Identifying the Types Present in Leaves**:
- Since stomata are present on leaves, stomatal transpiration is a key type of transpiration observed in leaves.
- The cuticle on leaves also allows for some water loss, making cuticular transpiration relevant as well.
- Lenticular transpiration does not occur in leaves, as lenticels are found on stems.

4. **Conclusion**: Therefore, the types of transpiration observed in leaves are stomatal and cuticular transpiration. Both types contribute to water loss in leaves.

**Final Answer**: The types of transpiration observed in leaves are stomatal and cuticular transpiration.

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