The signaling molecule for flowering might be released earlier than usual in a long-day plant exposed to flashes of
A) far-red light during the night.
B) red light during the night.
C) far-red light during the day.
D) red light during the day.

Question

Quizplus · Accepted Answer

Long-day plants require a certain duration of day and night to flower. Red light is the primary wavelength that promotes flowering in long-day plants. If a long-day plant is exposed to red light during the night, it will perceive it as an extension of the photoperiod, resulting in early flowering. Far-red light, on the other hand, inhibits flowering in long-day plants. Therefore, option B, red light during the night, is the best choice as it would result in the release of the flowering signal earlier than usual.

The Signaling Molecule for Flowering Might Be Released Earlier Than