Related Experiment Video
Updated: May 3, 2026

High-Throughput, In-Field Screening of Photosynthetic Efficiency in Crop Plants Using an Autonomous Robot
Published on: January 9, 2026
Photosynthesis at ambient and elevated humidity over a growing season in soybean
1Light and Plant Growth Laboratory, US Department of Agriculture, Beltsville Agricultural Research Center-West, 20705, Beltsville, MD, USA.
Abstract:
Daytime rates of net photosynthesis of upper canopy leaflets of soybeans were compared on 17 days for leaflets exposed to air at the ambient humidity and at a higher humidity. Leaflets at the higher humidity had higher rates of net photosynthesis on 16 of the 17 days. The daily total of net photosynthesis of leaflets at the higher humidity was on average 1.32 times that for leaflets at ambient humidity. A strong limitation of net photosynthesis by ambient humidity was found throughout the growing season.
More Related Videos
Related Concept Videos
Regulation of Transpiration by Stomata
Light Acquisition
Adaptations that Reduce Water Loss
The Calvin Benson Cycle
Responses to Drought and Flooding

