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Question
One set of a plant was grown at 12 hours day and 12 hours night period cycles and it flowered, while in the other set night phase was interrupted by flash of light and it did not produce flower. Under which one of the following categories, will you place this plant?
One set of a plant was grown at 12 hours day and 12 hours night period cycles and it flowered, while in the other set night phase was interrupted by flash of light and it did not produce flower. Under which one of the following categories, will you place this plant?
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Solution
The correct option is B Short day
When the plant is given 12 hours day light and 12 hours darkness, and then night phase interrupted by flash of light; a short day plant cannot flower. It is because, these plants can flower only when the day lengths are shorter than their critical day length. Example: Poinsettia critical day length is 10 hours.
When the plant is given 12 hours day light and 12 hours darkness, and then night phase interrupted by flash of light; a short day plant cannot flower. It is because, these plants can flower only when the day lengths are shorter than their critical day length. Example: Poinsettia critical day length is 10 hours.
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