Question

What is the site of perception of photoperiod necessary for induction of flowering in plants?

• A. Roots
• B. Stems
• C. Leaves
• D. Flowers

Hint:

Photoperiodism depends on the duration of light and darkness. Leaves detect this and send signals to the shoot for flowering.

Answer 1

The Correct Option is C

The leaves are the site of photoperiod perception in plants. The process involves:
Photoreceptors such as phytochromes in leaves detect the duration of light and dark periods.
Upon perceiving the correct photoperiod, the leaves produce a flowering signal, commonly known as florigen.
Florigen is transported to the shoot apical meristem, where it induces flowering by activating flowering genes.
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Final Answer: \[ \boxed{\text{Leaves}} \]