Gibberellins were first discoverded in fungal genus

Options

A. Mucor
B. Rhizopus
C. Agaricus
D. Fusarium

Answer

To answer the question about the discovery of gibberellins, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Gibberellins**: Gibberellins are a class of plant hormones that play a crucial role in regulating various growth processes in plants, such as stem elongation, germination, flowering, and fruit development.

2. **Historical Context**: The discovery of gibberellins dates back to research on certain fungi that produce these hormones as metabolic by-products.

3. **Identifying the Fungal Genus**: The question asks for the specific fungal genus from which gibberellins were first discovered. The options provided are:
- Mucor
- Rhizopus
- Agaricus
- Fusarium

4. **Researching the Correct Fungal Genus**: Gibberellins were first isolated from a fungus known as Gibberella fujikuroi, which is a member of the genus Fusarium. This fungus is known to cause a disease in rice seedlings, leading to the phenomenon known as "foolish seedling disease."

5. **Conclusion**: Based on the historical context and the identification of the fungal genus, the correct answer to the question is **Fusarium**.

### Final Answer:
Gibberellins were first discovered in the fungal genus **Fusarium**.

---