Letter | Published:

Kinetics of Photosynthesis

Nature volume 134, pages 289290 (25 August 1934) | Download Citation

Subjects

Abstract

BALY and Morgan1 have proposed kinetic equations which account for observations of Warburg2 and Emerson3 on the rate of photosynthesis. We wish to direct attention to one of Warburg's observations which is not in accordance with their equations. At low light intensities, the temperature coefficient of photosynthesis approaches unity, while at low carbon dioxide concentrations it remains high. We have confirmed this for five different species of algæ. This leads us to suppose that carbon dioxide is a reactant in the temperature-sensitive reaction, rather than in the photochemical reaction, where Baly and Morgan placed it. Their assumption seems to us untenable because it leads to equations in which light intensity and carbon dioxide concentration are interchangeable, and because according to photo chemical principles a photochemical primary process is unimolecular, taking place immediately on the absorption of light.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.

from$8.99

All prices are NET prices.

References

  1. 1.

    NATURE, 133, 414, March 17, 1934.

  2. 2.

    Biochem. Z., 100, 230; 1919.

  3. 3.

    J. Gen. Physiol., 12, 623; 1929.

  4. 4.

    J. Gen. Physiol., 15, 391; 1932.

Download references

Author information

Affiliations

  1. California Institute of Technology, Pasadena, California. June 7.

    • ROBERT EMERSON
    •  & LOWELL GREEN

Authors

  1. Search for ROBERT EMERSON in:

  2. Search for LOWELL GREEN in:

About this article

Publication history

Published

DOI

https://doi.org/10.1038/134289c0

Comments

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.