The piament involved in red - far red light interconversion is
Or
The pigm,ent involved in photomorphogenetic movements is
Or
Pigment involved in photo - perception in flowering is

Options

A. Cytochrome
B. Xanthophyll
C. Lycopene
D. Phytochrome

Answer

To solve the question regarding the pigment involved in red-far red light interconversion, photomorphogenetic movements, and photoperception in flowering, we can analyze the options provided:

1. **Understanding the Options**:
- **A. Cytochrome**: These are redox-active proteins that contain heme and are involved in the electron transport chain (ETC). They are not primarily involved in light perception or photomorphogenesis.
- **B. Xanthophyll**: These are yellow pigments that are derivatives of carotenoids and are involved in photosynthesis, but they do not play a significant role in red-far red light interconversion or photomorphogenetic movements.
- **C. Lycopene**: This is a bright red carotenoid found in tomatoes and other fruits. While it is a pigment, it does not play a significant role in the processes mentioned in the question.
- **D. Phytochrome**: This is a pigment that is specifically involved in the perception of red and far-red light. It plays a crucial role in photomorphogenetic responses in plants, including flowering and growth regulation.

2. **Identifying the Correct Answer**:
- Given the roles of the pigments described, **phytochrome** is the only pigment that is directly involved in red-far red light interconversion, photomorphogenetic movements, and photoperception in flowering.

3. **Conclusion**:
- Therefore, the correct answer to the question is **D. Phytochrome**.