Which of the following contributes about 1% of the total transpiration in plants ?

Options

A. Bark transpiration
B. Cuticular transpiration
C. Lenticular transpiration
D. Stomatal transpiration

Answer

To solve the question "Which of the following contributes about 1% of the total transpiration in plants?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand Transpiration**:
- Transpiration is the process by which water is absorbed by plant roots from the soil, moves through the plant, and is released as water vapor through pores in the leaves (stomata) and other plant parts.

2. **Identify Types of Transpiration**:
- There are different types of transpiration in plants:
- **Stomatal Transpiration**: This is the primary method of transpiration, accounting for about 85-90% of total transpiration.
- **Cuticular Transpiration**: This occurs through the cuticle of leaves and accounts for about 5-10%.
- **Bark Transpiration**: This type contributes approximately 1-2% of total transpiration.
- **Lenticular Transpiration**: This is minimal, contributing around 0.1%.

3. **Analyze the Options**:
- Given the options: Bark Transpiration, Critical Transpiration, Lenticular Transpiration, and Stomatal Transpiration, we need to identify which one contributes about 1% of total transpiration.

4. **Select the Correct Answer**:
- Based on the percentages discussed, Bark Transpiration is the correct answer as it contributes about 1-2% of the total transpiration in plants.

5. **Conclusion**:
- Therefore, the answer to the question is **Bark Transpiration**.

### Final Answer:
**Bark Transpiration** contributes about 1% of the total transpiration in plants.

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