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The plant which requires an exposure to light for a period gre
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The plant which requires an exposure to light for a period greater than critical day length is

A
Long day plants

B
Short day plants

C
Long-short day plants

D
Short-long day plants.

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Text SolutionText solutionverified iconVerified

The effect of photoperiods or daily duration of light hours (and dark periods) on the growth and development of plants, especially flowering, is called photoperiodism. Photoperiodism was first studied by Gamer and Allard (1920) in 'Maryland mammoth' a variety of Tobacco.
Long Day Plants (LDPs) flower when they receive long photoperiods or light hours which are above a critical length, e.g., henbane, wheat oat sugar beet, spinach (Spinacia oleracea), radish, barley, larkspur, lettuce.
So the correct answer is 'long day plants'.
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Question Text
The plant which requires an exposure to light for a period greater than critical day length is
TopicPlant Growth and Development
SubjectBiology
ClassClass 11
Answer TypeText solution:1
Upvotes57