ABA is involved in

Options

A. Shoot elongation
B. Increased cell division
C. Dormancy of seed
D. Root elongation

Answer

**Step-by-Step Solution:**

1. **Understanding ABA**: ABA stands for Abscisic Acid, which is a plant hormone known for its various roles in plant physiology.

2. **Identifying the Role of ABA**: ABA is primarily recognized as an inhibitory hormone. Its main functions include:
- Promoting seed dormancy: ABA helps in maintaining the dormancy of seeds, preventing them from germinating under unfavorable conditions.
- Controlling stomatal closure: ABA plays a crucial role in regulating the opening and closing of stomata, which helps in reducing water loss during drought conditions.

3. **Evaluating the Options**:
- **Option 1: Shoot elongation**: This is primarily regulated by hormones like auxins and gibberellins, not ABA.
- **Option 2: Increased cell division**: This process is mainly influenced by cytokinins, not ABA.
- **Option 3: Dormancy of seed**: This is indeed a function of ABA, as it promotes seed dormancy.

4. **Conclusion**: Based on the evaluation of the options, the correct answer is that ABA is involved in the dormancy of seeds.

**Final Answer**: ABA is involved in the dormancy of seeds.

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