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Measuring Canopy Gas Exchange Using CAnopy Photosynthesis and Transpiration Systems (CAPTS)
Qingfeng Song1, Xin-Guang Zhu2
1Key Laboratory of Plant Carbon Capture, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China.
Methods in Molecular Biology (Clifton, N.J.)
|April 22, 2024
Summary
Canopy photosynthesis (Ac) is key for biomass production. The Canopy Photosynthesis and Transpiration Measurement System (CAPTS) enables precise measurement of CO2 and H2O fluxes in various crops.
Area of Science:
- Agricultural Science
- Plant Physiology
- Environmental Science
Background:
- Canopy photosynthesis (Ac) is crucial for biomass production, correlating with daily and seasonal yield.
- Leaf-level photosynthesis is less indicative of overall crop productivity than canopy-level processes.
Purpose of the Study:
- To introduce the Canopy Photosynthesis and Transpiration Measurement System (CAPTS).
- To detail the protocol for using CAPTS to measure CO2 and H2O fluxes in different crop systems.
Main Methods:
- CAPTS continuously records environmental parameters (CO2, H2O, temperature, pressure, humidity, PPFD) within a chamber.
- The system derives CO2 and H2O fluxes from recorded data.
- Integration with CH4 and N2O analyzers allows for greenhouse gas flux measurements.
Main Results:
- The study describes the application of CAPTS for experiments on rice, wheat, and tobacco.
- The system provides accurate measurements of canopy CO2 uptake, transpiration, and respiration rates.
Conclusions:
- CAPTS is a versatile tool for measuring canopy gas exchange in diverse agricultural settings.
- This protocol facilitates standardized measurements for improved crop yield and environmental studies.
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