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by durai raja on April 13th, 2005

durai raja

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What is "photorespiration" and why it is needed by plants?

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  • by greengai on November 19th, 2010

    greengai

    In Photosynthesis:
    1 turn of Calvin Cycle produces 1 G3P, but Calvin Cycle most go through 2 turns and make 2 G3P because 2 turns uses 1 CO2, 2 NADH, 3 ATP (you can't use 1/2 CO2)

    In Photo-respiration:
    2 turns in Calvin Cycle creates 1 G3P and 1 phosphoglycolate (which is toxic to plants and takes a detour to break down). Photo-respiration is used so that plants don't lose water, but still able to produce G3P, but inefficient compare to photosynthesis.
    Courtesy of Biology-Online.org
    http://www.biology-online.org/dictionary/Photorespiration

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