Gibberellins may be substituted for ___________ light, therefore promote flowering in long day plants?
Correct answer: B. Red
- A. White
- B. Red
- C. Blue
- D. Green
Explanation
In some long-day plants, gibberellin treatment can replace the flowering effect normally produced by a red-light-dependent long-day response, allowing flowering without the required photoperiod. Blue light is a likely alternative because it also affects photoreceptors, but the standard answer in this plant-physiology statement is red light.
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