What does a short-day plant need in order to flower?
A)a burst of red light in the middle of the night
B)a burst of far-red light in the middle of the night
C)a day that is longer than a certain length
D)a night that is longer than a certain length
E)a higher ratio of Pr to Pfr.

Question

Quizplus · Accepted Answer

Short-day plants require a night that is longer than a certain length (usually around 12-13 hours) to trigger flowering. This is because the production of a flowering hormone called florigen is stimulated during long periods of darkness.

What Does a Short-Day Plant Need in Order to Flower