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

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Lateral buds

Shoot apex

Pulvinus

Leaves

answer is A.

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Detailed Solution

Leaf is the photoperiod measuring or perceiving part of plant. It is due to the presence of phytochrome, a light-sensitive
pigment of leaf. The photoperiod stimulus developed in leaf is later transmitted to shoot apex for induction of flowering.

Lateral buds, pulvinus leaf base and shoot apex have no role in perceiving light. Shoot apex perceives low temperature.

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