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Influence of Red and Far-red Light on the Photo-oxidation of Ascorbic Acid and Photoreduction of its Oxidized Forms

Naturevolume 204pages886887 (1964) | Download Citation



PHOTO-OXIDATION of ascorbate and photoreduction of its oxidized forms have been demonstrated in leafy tissues1,2. In these investigations evidence was obtained that photoreduction was a separate photochemical reaction from photo-oxidation, being differentiated from the latter by: (1) a different time sequence in its initiation by light; (2) its insensitivity to cyanide; (3) its more heatlabile nature; (4) the ability of red light (710–720 mµ) to activate photo-oxidation but not photoreduction.


  1. 1

    Mapson, L. W., Biochem. J., 85, 360 (1962).

  2. 2

    Mapson, L. W., Phytochem., 3, 429 (1964).

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  1. Low Temperature Research Station, Downing Street, Cambridge

    • L. W. MAPSON
    •  & T. SWAIN


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