Parthenocarpic fruits are prepared by spraying

Options

A. ethylene
B. auxins
C. abscisic acid
D. both (2) and (3)

Answer

**Step-by-Step Solution:**

1. **Understanding Parthenocarpy**:
- Parthenocarpy is the process of fruit development without fertilization. This means that the fruit can develop from the ovary of a flower without the need for sperm from pollen.
- Examples of parthenocarpic fruits include bananas and tomatoes.

2. **Identifying the Hormones**:
- The question asks which hormone is used to prepare parthenocarpic fruits. The options given are ethylene, auxins, abscisic acid, and a combination of auxins and abscisic acid.
- Ethylene is primarily known for its role in the ripening of fruits.
- Auxins are plant hormones that promote various growth processes, including the development of fruits without fertilization.

3. **Role of Auxins in Parthenocarpy**:
- Auxins are specifically responsible for inducing parthenocarpy. They stimulate the growth of the ovary into a fruit even in the absence of fertilization.
- This makes auxins the key hormone in the process of parthenocarpy.

4. **Excluding Other Hormones**:
- Ethylene, while important for ripening, does not initiate parthenocarpy.
- Abscisic acid (ABA) is known as a stress hormone and is involved in processes like closing stomata during water stress, but it does not play a role in fruit development without fertilization.

5. **Conclusion**:
- Based on the roles of these hormones, the correct answer to the question is that parthenocarpic fruits are prepared by spraying **auxins**.

**Final Answer**: Parthenocarpic fruits are prepared by spraying auxins.

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