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Plant Physiology 50:28-30 (1972)
© 1972 American Society of Plant Biologists

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Articles

A Re-evaluation of Soybean Leaf Photorespiration 1

Y. B. Samisha and J. E. Pallas, Jr.b

G. M. Dornhoffc and R. M. Shiblesc

a Soil and Water Conservation Research Division, Agricultural Research Service, United States Department of Agriculture, Watkinsville, Georgia 30677, Department of Agronomy, University of Georgia, Athens, Georgia 30601, Department of Agronomy, Iowa State University, Ames, Iowa 50010

Recalculations of soybean photorespiration indicate that mean rates are closer to 16.1 than 5.6 milligrams of CO2 per square decimeter per hour as previously reported. Photorespiration of soybean thus amounts to at least a 30% carbon turnover of light-saturated photosynthesis. Photorespiration showed no significant relationship to net photosynthesis. Negative correlations were found between CO2 efflux and stomatal resistance as well as between corrected photorespiration and residual intracellular resistance of the leaf to CO2 uptake.

1 Contribution from the Southern Branch, Soil and Water Conservation Research Division, Agricultural Research Service, United States Department of Agriculture, the University of Georgia Agricultural Experiment Stations, and Journal Paper J-6765, Project Nos. 1487 and 1685, of the Iowa Agricultural and Home Economics Experiment Station, Ames, Iowa.




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I. Zelitch
Improving the Efficiency of Photosynthesis
Science, May 9, 1975; 188(4188): 626 - 633.
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Copyright © 1972 by the American Society of Plant Biologists