Lateral axillary buds are not allowed to grow by

Options

A. Auxin
B. Ethylene
C. Gibberellin
D. Cytokinin.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which factor prevents the growth of lateral axillary buds in plants.

2. **Identifying Key Terms**: The key terms in the question are "lateral axillary buds" and "not allowed to grow". This suggests we need to look for a mechanism or substance that inhibits their growth.

3. **Concept of Apical Dominance**: The phenomenon where the central stem (apex) of a plant grows more vigorously than the lateral stems (axillary buds) is known as apical dominance. This is an important concept in plant growth.

4. **Role of Plant Hormones**: Plant hormones play a crucial role in regulating growth. The primary hormone involved in apical dominance is auxin, which is produced at the tip of the shoot.

5. **Function of Auxin**: Auxin promotes the growth of the central stem while inhibiting the growth of lateral axillary buds. This means that auxin is responsible for maintaining apical dominance.

6. **Effect of Cutting the Shoot Tip**: When the tip of the shoot is cut, the concentration of auxin decreases in the plant. This reduction allows the lateral axillary buds to grow, as the inhibitory effect of auxin is removed.

7. **Conclusion**: Based on the understanding of apical dominance and the role of auxin, we conclude that lateral axillary buds are not allowed to grow by auxin.

**Final Answer**: Lateral axillary buds are not allowed to grow by auxin.

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