A) \[{{P}_{fr}}\]forms
B) \[{{P}_{r}}\]forms
C) Both forms
D) None of these
Correct Answer: A
Solution :
\[{{P}_{fr}}\] form of phytochrome is physiologically active while \[{{P}_{r}}\]is inactive form. Red light absorption means the formation of \[{{P}_{fr.}}{{P}_{fr}}\]formation induces the seed germination. On the contrary, far red light or \[{{P}_{r}}\] formation inhibits the germination.
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