Related Experiment Video
Updated: Aug 8, 2026

High-Throughput Analysis of Non-Photochemical Quenching in Crops Using Pulse Amplitude Modulated Chlorophyll Fluorometry
Published on: July 6, 2022
A Re-evaluation of Soybean Leaf Photorespiration
1Soil and Water Conservation Research Division, Agricultural Research Service, United States Department of Agriculture, Watkinsville, Georgia 30677.
Abstract:
Recalculations of soybean photorespiration indicate that mean rates are closer to 16.1 than 5.6 milligrams of CO(2) 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 CO(2) efflux and stomatal resistance as well as between corrected photorespiration and residual intracellular resistance of the leaf to CO(2) uptake.
Related Concept Videos
Light Acquisition
Regulation of Transpiration by Stomata
Adaptations that Reduce Water Loss
Photoreceptors and Plant Responses to Light
The Calvin Benson Cycle

