First slide

Photoperiodism

Question

The site of perception of light/dark duration in plants is:

Easy

A

shoot apex.
B

leaf.
C

root.
D

trichomes.

Solution

The site of perception of light/dark duration are the leaves. It has been hypothesised that there is a hormonal substance(s) that is responsible for flowering. This hormonal substance migrates from leaves to shoot apices for inducing flowering only when the plants are exposed to the necessary inductive photoperiod.

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