Where are gibberellins present in greatest concentration?

Answer

**Step-by-Step Solution:**

1. **Understanding Gibberellins**: Gibberellins are a type of plant hormone that play a crucial role in regulating growth and development in plants.

2. **Functions of Gibberellins**: They promote various growth processes, including:
- Increasing the internodal length of plants, which contributes to overall height.
- Enhancing seed germination by breaking seed dormancy.

3. **Mechanism of Action**: Gibberellins help in the growth of the embryo during seed germination by synthesizing hydrolytic enzymes, such as alpha-amylase. This enzyme converts stored starch in the endosperm into simple sugars, providing energy for the growing embryo.

4. **Location of Highest Concentration**: Gibberellins are found in the highest concentrations in:
- Seeds (where they are crucial for germination and early growth).
- Young leaves (where they promote growth and development).

5. **Conclusion**: Therefore, gibberellins are present in greatest concentration in seeds and young leaves.

**Final Answer**: Gibberellins are present in greatest concentration in seeds and young leaves.

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