Hormone that promotes growth of lateral buds and has negative effect on apical dominance is

Options

A. cytokinin
B. gibberellin
C. auxin
D. both (b) and (c)

Answer

To answer the question regarding the hormone that promotes the growth of lateral buds and has a negative effect on apical dominance, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Apical Dominance**:
- Apical dominance refers to the phenomenon where the main central stem of the plant grows more strongly than the side stems. This is primarily regulated by the plant hormone auxin, which is produced at the apex (tip) of the plant.

2. **Role of Auxin**:
- Auxin promotes the growth of the plant from the top (apex) and inhibits the growth of lateral buds. This means that when auxin is present, it encourages the plant to grow taller rather than allowing the lateral buds to develop.

3. **Identifying the Opposing Hormone**:
- To find the hormone that promotes lateral bud growth and counteracts apical dominance, we need to look for a hormone that works against auxin.

4. **Cytokinins**:
- Cytokinins are a class of plant hormones that promote cell division and growth in the lateral buds. They have a negative effect on apical dominance by promoting the growth of lateral buds when they are present.

5. **Conclusion**:
- Therefore, the hormone that promotes the growth of lateral buds and has a negative effect on apical dominance is **cytokinin**.

### Final Answer:
The hormone that promotes growth of lateral buds and has a negative effect on apical dominance is **cytokinin**.

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