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This article in AJ

  1. Vol. 55 No. 1, p. 36-39
    Received: Apr 2, 1962

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Radiation in the Plant Environment and Photosynthesis1

  1. Paul E. Waggoner,
  2. D. N. Moss and
  3. J. D. Hesketh2



Chemical theory predicts that an increase in light intensity will increase photosynthesis whenever the quantity of CO2 and turbulence are of the magnitude encountered in the field. Diffusion theory predicts the equivalent effect of increasing turbulence of CO2. In fact photosynthesis of cane increased between 1.2 and 1.6 cal. cm.−2 min.−1 of incandescent light, even at 200 ppm CO2 in calm air. On the other hand, photosynthesis of tobacco and dogwood increased little at sunlight intensities above 0.4 cal. cm.−2 min.−1.

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