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

Step-by-step solution

Short-day plants require long uninterrupted dark period for flowering. They will not produce flower if night was interrupted by flash of light. In these plants, flowering takes place after exposure to a photoperiod shorter than their critical photoperiod.