Which plant is LDP : -

Options

A. Tobacco
B. Glycine max
C. Mirabilis jala
D. Spinach

Answer

To determine which plant is classified as a Long Day Plant (LDP), we need to understand the concept of photoperiodism and the characteristics of different types of plants based on their light requirements.

### Step-by-Step Solution:

1. **Understand Photoperiodism**:
- Photoperiodism refers to how plants respond to the lengths of day and night. It plays a crucial role in the flowering process of plants.

2. **Categories of Plants**:
- Plants can be broadly classified into three categories based on their light requirements:
- **Long Day Plants (LDP)**: These plants require longer daylight periods (more than the critical duration) and shorter night periods (short scotoperiod).
- **Short Day Plants (SDP)**: These plants require shorter daylight periods (less than the critical duration) and longer night periods (long scotoperiod).
- **Day Neutral Plants (DNP)**: These plants are not affected by the length of day or night and can flower regardless of the photoperiod.

3. **Examples of Long Day Plants**:
- Some common examples of Long Day Plants include:
- Spinach
- Wheat
- Oat
- Sugar beet
- Radish
- Lettuce

4. **Identify the Correct Answer**:
- From the options provided, we need to identify which plant is a Long Day Plant. According to the information, **Spinach** is specifically mentioned as an example of a Long Day Plant.

5. **Conclusion**:
- Therefore, the correct answer to the question "Which plant is LDP?" is **Spinach**.