If a short day plant is given ten hours light and fourteen hour darkness but the dark period is interrupted in the middle by a flash of 730 nm wavelength of light, then

Options

A. Production of flower is delayed
B. The plant produces flowers
C. The plant does not produce flowers
D. The plant will produce parthenocarpic fruits.

Answer

To solve the question, we need to understand the effects of light exposure on short-day plants, particularly how interruptions during the dark period influence flowering.

### Step-by-Step Solution:

1. **Identify the Plant Type**:
- The question specifies a "short day plant." These plants typically require longer periods of darkness (nights) to trigger flowering.

2. **Understand the Light and Dark Conditions**:
- The plant is given 10 hours of light and 14 hours of darkness. This setup is generally favorable for short-day plants since they need long nights.

3. **Consider the Interruption**:
- The dark period is interrupted by a flash of light at 730 nm wavelength. This wavelength is significant because it is associated with the phytochrome system in plants.

4. **Phytochrome Response**:
- Phytochrome exists in two forms: Pr (inactive) and Pfr (active). The flash of light at 730 nm will convert any Pfr back to Pr, effectively reducing the amount of active phytochrome available.

5. **Impact on Flowering**:
- Since short-day plants require uninterrupted long nights to flower, the interruption of darkness by light (especially at 730 nm) will disrupt the conditions necessary for flowering.

6. **Conclusion**:
- As a result of the interruption, the flowering process will be delayed or suspended. Therefore, the plant will not produce flowers under these conditions.

### Final Answer:
The production of flowers is delayed.

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