Which of the following hormones plays an important role in seed maturation ?

Options

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

Answer

To determine which hormone plays an important role in seed maturation, we can analyze the functions of the hormones listed in the question: Abscisic Acid (ABA), Ethylene, Cytokinin, and Auxin.

### Step-by-Step Solution:

1. **Understanding the Role of Abscisic Acid (ABA)**:
- ABA is known for its critical role in seed maturation and dormancy. It helps in the development of seeds and ensures that they remain dormant until conditions are favorable for germination.
- It is often referred to as the stress hormone because it helps plants cope with stress conditions, such as drought.

**Hint**: Focus on the role of ABA in seed development and dormancy.

2. **Analyzing Ethylene**:
- Ethylene is primarily involved in the ripening of fruits and is not directly responsible for seed maturation. It promotes processes like fruit ripening and leaf abscission.

**Hint**: Remember that ethylene is associated with fruit ripening rather than seed maturation.

3. **Examining Cytokinin**:
- Cytokinins are primarily involved in promoting cell division and growth. They also play a role in delaying senescence (aging) in plants but do not have a significant role in seed maturation.

**Hint**: Cytokinins are more about growth and division than seed maturation.

4. **Considering Auxin**:
- Auxins are involved in various growth processes, including apical dominance and root formation. However, they do not play a direct role in seed maturation.

**Hint**: Auxins are important for growth but not specifically for seed maturation.

5. **Conclusion**:
- Based on the analysis, the hormone that plays an important role in seed maturation is **Abscisic Acid (ABA)**. It is crucial for the processes of seed development, maturation, and dormancy.

**Final Answer**: The correct option is **Abscisic Acid (ABA)**.