Letter | Published:

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

Nature volume 204, pages 886887 (28 November 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.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.


  1. 1.

    , Biochem. J., 85, 360 (1962).

  2. 2.

    , Phytochem., 3, 429 (1964).

Download references

Author information


  1. Low Temperature Research Station, Downing Street, Cambridge.

    • L. W. MAPSON
    •  & T. SWAIN


  1. Search for L. W. MAPSON in:

  2. Search for T. SWAIN in:

About this article

Publication history




Further reading


By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.