Which one is correct for blooming of short day plants

Options

A. The long dark period is not critical
B. It is affected by interruption of long dark period by brief exposure of light
C. It is affected if continuous light period is interrupted.
D. It is affected if continuous light period is interrupted.

Answer

To answer the question regarding the blooming of short day plants, let's break down the concepts involved step by step.

### Step-by-Step Solution:

1. **Understanding Short Day Plants**:
- Short day plants are those that flower when the day length is shorter than a certain critical length. This means they require longer periods of darkness to initiate flowering.

2. **Critical Dark Period**:
- For short day plants, the critical factor is the length of the dark period. They need a long uninterrupted dark period to trigger the flowering process.

3. **Effect of Light Interruption**:
- If the long dark period is interrupted by a brief exposure to light, it can disrupt the flowering process. This is because the interruption can signal to the plant that the conditions are not suitable for flowering.

4. **Evaluating the Options**:
- **Option 1**: "Long dark period is not critical" - This is incorrect because the long dark period is essential for short day plants.
- **Option 2**: "It is affected by interruption of long dark period by brief exposure to light" - This is correct as it directly addresses how light interruption impacts flowering.
- **Option 3**: "It is affected if continuous light period is interrupted" - This is incorrect because short day plants require a short light period and are not affected by interruptions in a long light period.

5. **Conclusion**:
- The correct answer is that short day plants are affected by the interruption of the long dark period by brief exposure to light.

### Final Answer:
The correct statement regarding the blooming of short day plants is: **"It is affected by interruption of long dark period by brief exposure to light."**

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