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What is the action spectrum of photo per...

What is the action spectrum of photo peridism

A

430 and 660 nm

B

640 and 660 nm

C

660 and 730 nm

D

700 and 900 nm

Text Solution

Verified by Experts

The correct Answer is:
C

Photoperiodic stimulus is believed to be perceived by Phytochrome. It is a blue-green pigment existing in two inter-convertible forms. `P_(fr) or P_(730)` (absorbs far-red light) and `P_(r) or P_(660)` (absorbs red light).
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