Question

Write three differences between short day and long day plants.

Answer 1

Hint: The plants are classified based on their morphological and physiological characteristics. Some of the plants have different tissue arrangement and some of the plants are classified based on their response towards the light.

Complete Answer:
The photoperiodism is a phenomenon of plants in response to the length of light and dark period in a day. The changes in the light period and dark period duration are considered as photoperiods. In plants photoperiodism involves in the maintaining the flowering process. On the basis of the response towards photoperiodism the plants are classified into short day plants and long day plants.

Now, the difference between the long day plant and short day plant;

Sl.No	Short day plants	Long day plants
1.	The short day plants are those plants that bloom flower in day length shorter than the critical point.	The long day plants are those that bloom when they are exposed to days longer than the critical point.
2.	The short day plants need continuous dark periods.	The long day plants need light periods and it is critical for these plants.
3.	The short day plants do not bloom if the dark period is interrupted by a flash of light.	The long day plants bloom more effectively if the dark period is interrupted by a flash of light.
4.	The gibberellic acid in short day plants does not induce flowering process except in balsam.	The gibberellic acid induces the flowering process in long day plants.
5.	The short day plants are also considered as long night plants.	The long day plants are also considered as short night plants.
6.	The short day plants bloom normally in early autumn or spring.	The long day plants bloom in spring and early summer.
7.	Green grams, marijuana, cotton, soyabean, jowar and rice are examples of short day plants.	Wheat, henbane, carnation, lettuce, barley and oats are the example of long day plants.

Note: Some of the plants like; rice, cucumber, and corn are considered as day-neutral plants because their blooming process is regardless of the length of the light period like the long day and short day plants.