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Measuring Canopy Gas Exchange Using CAnopy Photosynthesis and Transpiration Systems (CAPTS)
Qingfeng Song1,2, Xin-Guang Zhu3
1National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China.
Methods in Molecular Biology (Clifton, N.J.)
|July 7, 2018
Summary
This study introduces the Canopy Photosynthesis and Transpiration Measurement System (CAPTS) for accurately measuring canopy photosynthesis and transpiration. This system is crucial for understanding biomass production in crops like rice, wheat, and tobacco.
Area of Science:
- Agricultural Science
- Plant Physiology
- Environmental Science
Background:
- Canopy photosynthesis (Ac) is more critical for biomass production than leaf photosynthesis.
- Daily and seasonal integrals of Ac correlate with biomass production.
Purpose of the Study:
- To describe the protocol for using the Canopy Photosynthesis and Transpiration Measurement System (CAPTS).
- To enable precise measurement of canopy photosynthetic CO2 uptake, transpiration, and respiration rates.
Main Methods:
- Development of the CAPTS to measure CO2 and H2O fluxes.
- Continuous recording of environmental parameters (CO2, H2O, temperature, pressure, humidity, PPFD) within the chamber.
- Application of CAPTS protocol to rice, wheat, and tobacco.
Main Results:
- CAPTS enables derivation of CO2 and H2O fluxes for canopies.
- The system was successfully applied to diverse crops in different field conditions.
Conclusions:
- CAPTS provides a robust method for studying canopy gas exchange.
- Accurate measurements of canopy photosynthesis are vital for improving crop biomass production.
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