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

Short-Day Plants vs Long-Day Plants

Difference between Long Day and Short 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.

Difference between Long Day and Short Day Plants

The present post discusses the Difference between Short-day plants and Long-day plants with a Comparison Table.

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Difference between Long Day and Short 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, CottonExamples 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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