Question

Phytochrome occurs in two forms. In which form(s) does it promote the germination of seeds of some species?

• A. (A) Pfr form
• B. (B) Pr form
• C. (C) Both (A) and (B)
• D. (D) None of these

Answer 1

Answer: (A)

(A) Pfr form

Answer 2

Explanation:
Phytochrome is a photoreceptor, a pigment that plants use to detect light. It is sensitive to light in the red and far-red regions of the visible spectrum. Many flowering plants use it to regulate the time of flowering based on the length of day and night (photoperiodism) and to set circadian rhythms. Pfr promotes the germination of seeds.Hence, the correct option is (A).