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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
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
The plant which requires an exposure to light for a period greater tha...
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 (Hyoscyamus Nget), wheat oat sugar beet, spinach (Spinacia oleracea), radish, barley, larkspur, lettuce.
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The plant which requires an exposure to light for a period greater than critical day length isa)Long day plantsb)Short day plantsc)Long-short day plantsd)Short-long day plantsCorrect answer is option 'A'. Can you explain this answer?
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