Difference between Short Day Plants and Long Day Plants – Comparison Table


Long day vs Short day Plants

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)
1Short-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.
2Short-day plants are also called as Long-night Plants.Long-day plants are also called as Short-night Plants.
3Examples of short-day plants: Rice, Jowar, Green Gram, Soybeans, Marijuana, Cotton Examples of long-day plants: Wheat, Carnation, Henbane, Oat, Barley, Lettuce
4Short-day plants usually flower in the early spring or autumn.Long-day plants flower in the spring or early summer.
5The continuous dark period is the critical period for short-day plants.Continuous day period is the critical period for long-day plants.
6Short-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.
7In short-day plants, the flowering is NOT STIMULATED when the long light period is interrupted with a dark periodIn long-day plants, the flowering is NOT INHIBITED when the dark period is intercepted by a flash of light.
8In 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.
9GA (gibberellic acid) Does not induce flowering in short-day plants.GA induces flowers in long-day plants.

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