In an experiment, one set of plants were exposed to the day-night period but with a dark period interrupted by the flash of light did not produce the flower. Such a plant is referred to as

Options

A. long day plants
B. day-neutral plants
C. indeterminate plants
D. short day plants

Answer

To solve the question regarding the type of plant that did not produce flowers when exposed to a dark period interrupted by a flash of light, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Photoperiodism**:
- Photoperiodism is the physiological reaction of organisms to the length of day or night. In plants, it influences flowering and other developmental processes.

2. **Identifying Plant Categories**:
- Plants can be categorized based on their light requirements for flowering:
- **Long Day Plants**: Require more than 12 hours of light for flowering (e.g., Pea, Oats).
- **Short Day Plants**: Require less than 12 hours of light and more than 12 hours of darkness for flowering.
- **Day Neutral Plants**: Flower regardless of the light duration (e.g., Tomato, Potato).

3. **Analyzing the Experiment**:
- In the experiment, the plants were subjected to a day-night cycle, but the dark period was interrupted by flashes of light.
- This interruption reduces the effective dark period, which is crucial for short day plants to flower.

4. **Conclusion**:
- Since the plants did not produce flowers due to the interrupted dark period, they are classified as **Short Day Plants**. These plants need a longer uninterrupted dark period to trigger flowering.

5. **Final Answer**:
- The type of plant referred to in the question is a **Short Day Plant**.