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Question
The site of perception of light in plants during photoperiodism is :
The site of perception of light in plants during photoperiodism is :
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Solution
The correct option is A Leaf
Flowering in certain plants depends on a combination of light and dark exposures and also their relative durations (photoperiods). This response of plants to periods of day/night is termed photoperiodism.
The shoot apices modify themselves into flowering apices prior to flowering. The shoot apices by themselves cannot percieve photoperiods. The site of perception of light/dark duration are the leaves. It has been hypothesised that a hormonal substance(s) that is responsible for flowering migrates from leaves to shoot apices for inducing flowering only when the plants are exposed to the necessary inductive photoperiod.
Flowering in certain plants depends on a combination of light and dark exposures and also their relative durations (photoperiods). This response of plants to periods of day/night is termed photoperiodism.
The shoot apices modify themselves into flowering apices prior to flowering. The shoot apices by themselves cannot percieve photoperiods. The site of perception of light/dark duration are the leaves. It has been hypothesised that a hormonal substance(s) that is responsible for flowering migrates from leaves to shoot apices for inducing flowering only when the plants are exposed to the necessary inductive photoperiod.
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