A) Photoperiod less than 12'hours.
B) Photoperiod shorter than initial value and uninterrupted long night.
C) Short photoperiod and interrupted long night.
D) Long night
Correct Answer: B
Solution :
[b] Short-day plants flower, only if light periods are shorter than some critical length. In these plants the dark period is critical and must be continuous. If this dark period is interrupted even with a brief exposure of light, the short day plant will not flower. Strawberries, Dahlias, soyabeans and Chrysanthemums are short day plants.
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