How many gibberellins have been reported from fungi and higher plants -

Options

A. Less than 100
B. More than 1000
C. More than 100
D. 100

Answer

### Step-by-Step Solution:

1. **Understanding Gibberellins**: Gibberellins, also known as gibberellic acids, are a class of plant hormones that play a crucial role in regulating various aspects of plant growth and development, including cell elongation, seed germination, and flowering.

2. **Classification of Plant Growth Regulators**: Plant growth regulators (PGRs) can be categorized into promoters and inhibitors. Gibberellins fall under the category of promoters, which facilitate growth processes such as cell division and elongation.

3. **Types of Plant Growth Regulators**: The main types of plant growth regulators include:
- **Promoters**: Such as auxins, gibberellins, and cytokinins, which promote growth.
- **Inhibitors**: Such as abscisic acid (ABA), which inhibit growth, especially in response to stress or injury.

4. **Discovery of Gibberellins**: Over time, numerous gibberellins have been identified. The first gibberellin discovered was GA3, which is also the most studied due to its early identification.

5. **Total Number of Gibberellins**: Research has reported that there are more than 100 different gibberellins identified from fungi and higher plants. This includes various forms such as GA1, GA2, GA3, and so on.

6. **Conclusion**: The answer to the question of how many gibberellins have been reported from fungi and higher plants is that there are over 100 gibberellins.

### Final Answer:
**More than 100 gibberellins have been reported from fungi and higher plants.**

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