Gibberellin mediate amylase formation during germination of cereal grains is inhibited by

Options

A. Abscisic acid
B. Ethylene
C. Gibberellins
D. Cytokinins

Answer

To solve the question regarding what inhibits gibberellin-mediated amylase formation during the germination of cereal grains, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Amylase Role**:
- Amylase is an enzyme that is crucial during the germination of seeds. It breaks down stored starch in the cotyledons into simpler sugars like maltose and glucose, which provide energy for the growing plant.

2. **Gibberellin Function**:
- Gibberellins are plant hormones that promote seed germination by stimulating the production of amylase. They help mobilize the stored starch in the seeds, facilitating the growth process.

3. **Identifying the Inhibitor**:
- The question asks for the factor that inhibits the formation of amylase mediated by gibberellin. The key hormone that acts antagonistically to gibberellin is abscisic acid (ABA).

4. **Role of Abscisic Acid**:
- Abscisic acid inhibits the synthesis of amylase and promotes seed dormancy. This means that while gibberellin encourages germination and amylase production, abscisic acid works against this process.

5. **Conclusion**:
- Therefore, the correct answer to the question is that gibberellin-mediated amylase formation during germination of cereal grains is inhibited by **abscisic acid**.

### Final Answer:
**Abscisic acid (ABA)**

---