Plants That Have Their Flowering Inhibited by Being Exposed to Bright

Question

Plants that have their flowering inhibited by being exposed to bright lights at night are
A)day-neutral plants.
B)short-night plants.
C)devoid of phytochrome.
D)short-day plants.
E)long-day plants.

Accepted Answer

Short-day plants are plants that require a period of darkness (usually more than 12 hours) to initiate flowering. When exposed to bright lights at night, their flowering is inhibited. Day-neutral plants are not affected by the duration of light or darkness and can flower under any photoperiod. Long-day plants require a period of light longer than a certain critical length to flower, but they are not inhibited by exposure to bright lights at night. Short-night plants and the absence of phytochrome are not commonly used classifications for plants' photoperiodic responses.