Photoperiod stimulus is perceived by ________ pigment.

cryptochrome

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cytochrome

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phytochrome

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monochrome

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Solution

The correct option is C phytochrome
Experimental evidences have indicated that the photoperiodic stimulus in plants is perceived by pigment phytochrome. Phytochrome is a photoreversible pigment that absorbs light and the flowering is a phytochrome-mediated process.

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Question 12:

The photoperiod in plants is perceived at
(a) meristem
(b) flower
(c) floral buds
(d) leaves

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