Question : Classify and explain the plants based on photoperiodism.

1.	Question : Classify and explain the plants based on photoperiodism.
Answer» Solution :i. Long day plants: The plants that required long critical day length for flowering are called long day plants or short NIGHT plant. Example : PEA, Barley and Oats. ii. Short long day plants: These are long day plants but should be exposed to short day lengths during EARLY period of growth for flowering. Example : Wheat and Rye. iii. Short day plants : The plants that require a short critical day length for flowering are celled short day plants or long night plants. Example : Tobacco, Cocklebur, Soybean, Rice and Chrysamthemum. iv. Long short day plants : These are actually short-day plants but they have to be exposed to long days during their early periods of growth for flowering. Example : Some SPECIES of Bryophyllum and Night jasmine. v. INTERMEDIATE day plants : These require a photoperiod between long day and short day for flowering . Example : Sugercane and Coleus. vi. Day neutral plants: There are a number of plants which can flower in all possible photoperiods. They are also called photo neutrals or indeterminate plants. Example : Potato, Rhododendron, Tomato and Cotton.

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