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Question

One set of a plant was grown at 12 hours a day and 12 hours night period cycles and it flowered while in the other set night phase was interrupted by a flash of light and it did not produce a flower. Under which one of the following categories will you place this plant?


A

Darkness neutral

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B

Day neutral

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C

Short day

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D

Long day

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Solution

The correct option is C

Short day


The condition shows that the plant requires photoperiod shorter than the critical day length. This plant needs uninterrupted dark period for flowering. Therefore, it is a short day plant and these do not flower if the dark period is interrupted by flashes of light.


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