A Long-Day Plant Will Flower

Question

A long-day plant will flower
A)in the late fall.
B)when the night is shorter than a critical value.
C)only under artificial light in the summer.
D)during short days with proper fertilization.
E)regardless of the photoperiod imposed.

Accepted Answer

Long-day plants require a photoperiod that is longer than a critical value for flowering to occur. This means that they flower when the night is shorter than a specific amount, typically around 14-16 hours of darkness. They will not flower under artificial light in the summer and require proper fertilization, but these factors alone are not sufficient to induce flowering in long-day plants. Furthermore, long-day plants will not flower regardless of photoperiod imposed, as they specifically require a certain night length to initiate flowering.