Gibberellins stimulate the synthesis of `"____________"` during seed germination.

Answer

To answer the question "Gibberellins stimulate the synthesis of __________ during seed germination," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Gibberellins**:
- Gibberellins are a type of plant hormone known as phytohormones that play a crucial role in various plant growth processes, including seed germination.

2. **Location of Synthesis**:
- Gibberellins are synthesized in the embryo of the seed. This means that as the seed begins to germinate, the embryo produces gibberellins.

3. **Release of Gibberellins**:
- Once synthesized, gibberellins are released into the starchy endosperm of the seed. The starchy endosperm serves as a food reserve for the developing plant.

4. **Diffusion to Alluron Layer**:
- The gibberellins diffuse from the starchy endosperm to the alluron layer, which is a layer rich in proteins.

5. **Function of Alluron Layer**:
- The alluron layer is responsible for synthesizing enzymes that are crucial for breaking down stored food in the seed.

6. **Synthesis of Alpha Amylase**:
- One of the key enzymes synthesized in the alluron layer in response to gibberellins is alpha amylase. This enzyme is important because it hydrolyzes starch into simpler sugars.

7. **Importance of Alpha Amylase**:
- The breakdown of starch into simple sugars provides the necessary energy and building blocks for the growing seedling, facilitating the germination process.

### Final Answer:
Gibberellins stimulate the synthesis of **alpha amylase** during seed germination.

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