Short-Day Plants vs Long-Day Plants
(Similarities and Differences between Short-Day Plants and Long-Day Plants)
Photoperiodism is the response of plants (or any organism) to the lengths of dark and light periods in a day. The changes in the duration of light and dark periods in a day are called photoperiods. In plants, the photoperiodism induces flowering. Based on the response towards photoperiodism, the plants are classified into two categories – Short-day plants (SDPs) and Long-day plants (LDPs).
Short-day plants (SDPs): These plants flower only in short days or their flowering is induced by short days. These plants cannot flower under the short nights.
Long-day plants (LDPs): These plants flower only in long days or their flowering is induced by long days.
The present post discusses the Difference between Short-day plants and Long-day plants with a Comparison Table.
Difference between Short Day Plants and Long Day Plants
Sl. No. Short-Day Plants (SDPs) Long-Day Plants (LDPs)
1 Short-day plants flower when they are exposed to day length SHORTER than the critical maximum period. Long-day plants flower when they are exposed to day length LONGER than the critical minimum period.
2 Short-day plants are also called as Long-night Plants. Long-day plants are also called as Short-night Plants.
3 Examples of short-day plants: Rice, Jowar, Green Gram, Soybeans, Marijuana, Cotton Examples of long-day plants: Wheat, Carnation, Henbane, Oat, Barley, Lettuce
4 Short-day plants usually flower in the early spring or autumn. Long-day plants flower in the spring or early summer.
5 The continuous dark period is the critical period for short-day plants. Continuous day period is the critical period for long-day plants.
6 Short-day plants do not flower if the critical dark period is interrupted by a flash of light. In long-day plants, the flowering is stimulated when the dark period is interrupted by a flash of light.
7 In short-day plants, the flowering is NOT STIMULATED when the long light period is interrupted with a dark period In long-day plants, the flowering is NOT INHIBITED when the dark period is intercepted by a flash of light.
8 In short-day plants, the flowering is not induced if the plants are subjected to short light and short dark periods. In long-day plants flowering is induced if plants are exposed to short light period with still shorter dark period.
9 GA (gibberellic acid) Does not induce flowering in short-day plants. GA induces flowers in long-day plants.
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