First slide
Photoperiodism
Question

The photosensitive pigment responsible for flowering is:

Moderate
Solution

Appropriate light/ dark duration perceived by the leaves with the help of a proteinaceous pigment called phytochrome. Phytochrome is a chromoprotein pigment located on cell membrane. After suitable exposure, a hypothetical hormonal substance (florigen) migrates from leaves to shoot apices for inducing flowering. 

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