Which of the following is not a physiological effect/ an influence of auxin

Options

A. Promotes bolting
B. Prevents early fruit and leaf drop
C. Promotes flowering
D. Initiates rooting in stem cuttings

Answer

**Step-by-Step Solution:**

1. **Understand Auxin**: Auxin is a plant growth hormone that plays a crucial role in various physiological processes in plants. It is involved in growth regulation, flowering, and root development.

2. **Identify Functions of Auxin**:
- Auxin promotes flowering.
- It initiates rooting in stem cuttings.
- It prevents early fruit and leaf drop by forming an abscission layer.

3. **Analyze the Options**:
- **Promotes Bolting**: Bolting refers to premature flowering, which is not influenced by auxin.
- **Prevents Early Fruit and Leaf Drop**: This is a known function of auxin.
- **Promotes Flowering**: Auxin is known to promote flowering.
- **Initiates Rooting in Stem Cuttings**: Auxin is responsible for this process.

4. **Determine the Correct Answer**: Since auxin does not promote bolting, the option "promotes bolting" is the correct answer to the question as it is not a physiological effect of auxin.

**Final Answer**: Promotes bolting.

---