In the process of apical dominance, lateral buds are unable to grow in the presence of apical bud. This is due to

Options

A. less amount of auxin in apical bud
B. more amount of auxin in apical bud
C. less amount of cytokinins in lateral buds.
D. more amount of cytokinins in lateral buds.

Answer

### Step-by-Step Solution:

1. **Understanding Apical Dominance**:
- Apical dominance is a phenomenon where the growth of lateral buds is inhibited by the presence of the apical bud. This means that when the apical bud is present, the lateral buds do not grow.

2. **Role of Auxin**:
- The apical bud produces a plant hormone called auxin, specifically indole acetic acid (IAA). Auxin is crucial for regulating plant growth and development.

3. **Inhibition of Lateral Bud Growth**:
- The auxin produced by the apical bud travels down the plant and inhibits the growth of lateral buds. This means that the higher concentration of auxin in the area around the apical bud suppresses the lateral buds from growing.

4. **Sensitivity of Lateral Buds**:
- Lateral buds are more sensitive to auxin compared to apical buds. This increased sensitivity means that even a small amount of auxin can significantly inhibit the growth of lateral buds.

5. **Evaluating Options**:
- Now, we need to evaluate the given options regarding what causes the inhibition of lateral bud growth:
- **Option 1**: Less amount of auxin in apical bud - Incorrect, as it is the high amount of auxin that inhibits growth.
- **Option 2**: More amount of auxin in apical bud - Correct, as this high concentration inhibits lateral bud growth.
- **Option 3**: Less amount of cytokinin in lateral bud - Incorrect, as cytokinin does not play a direct role in the inhibition caused by auxin.
- **Option 4**: More amount of cytokinin in lateral bud - Incorrect, as the presence of cytokinin does not affect the inhibition caused by auxin.

6. **Conclusion**:
- The correct answer is that the inhibition of lateral bud growth in the presence of the apical bud is due to the **more amount of auxin in the apical bud**.