Which of the PGRs induces parthenocarpy in Tomatoes ?

Options

A. Auxin
B. Gibberellins
C. Cytokinin
D. Ethylene

Answer

To solve the question "Which of the PGRs induces parthenocarpy in Tomatoes?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question is asking which plant growth regulator (PGR) is responsible for inducing parthenocarpy in tomatoes. Parthenocarpy is the development of fruit without fertilization.

2. **Identify the Options**: The options provided are:
- Auxin
- Gibberellin
- Cytokinin
- Ethylene

3. **Define PGRs**: Plant Growth Regulators (PGRs) are hormone-like chemicals that regulate plant growth and development.

4. **Analyze Each Option**:
- **Auxin**: This hormone is known to promote growth and development in plants. It is specifically noted for its role in inducing parthenocarpy in tomatoes, particularly through the use of synthetic auxins like 2-4-D.
- **Gibberellin**: This PGR is involved in processes like seed germination, flowering, and fruit ripening, but it does not induce parthenocarpy.
- **Cytokinin**: This hormone promotes cell division and growth in lateral buds but does not induce parthenocarpy.
- **Ethylene**: This hormone is primarily involved in fruit ripening and flower opening, not in inducing parthenocarpy.

5. **Select the Correct Option**: Based on the analysis, auxin is the correct PGR that induces parthenocarpy in tomatoes.

### Final Answer:
The PGR that induces parthenocarpy in tomatoes is **Auxin**.

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