Which hormones help in breaking the dormancy of seed ?
(A) ABA
(B) CK
(C) GA
(D) Ethylene

Options

A. (a) A, B, C
B. (b) A, B, D
C. (c) B, C, D
D. (d) A, C, D

Answer

To determine which hormones help in breaking the dormancy of seeds, we can analyze each of the given options:

1. **Abscisic Acid (ABA)**:
- Abscisic acid is known to induce seed dormancy and inhibit growth and development in plants. Therefore, it has an inhibitory effect on seed germination and is not involved in breaking dormancy.
- **Conclusion**: ABA is not the correct answer.

2. **Cytokinins (CK)**:
- Cytokinins are known for promoting cell division and growth. They play a role in breaking dormancy and promoting germination.
- **Conclusion**: CK could be a correct answer.

3. **Gibberellic Acid (GA)**:
- Gibberellic acid is well-known for breaking seed dormancy and promoting germination. It helps in the elongation of stems and breaking dormancy in seeds.
- **Conclusion**: GA is also a correct answer.

4. **Ethylene**:
- Ethylene is a plant hormone that is known to promote ripening in fruits and can also help in breaking seed dormancy. It plays a role in various developmental processes, including germination.
- **Conclusion**: Ethylene is also a correct answer.

Based on the analysis, the hormones that help in breaking seed dormancy are Cytokinins (CK), Gibberellic Acid (GA), and Ethylene. Therefore, the correct answer is:

**(C) CK, GA, Ethylene.**

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