Modified photochemical reflectance index to estimate leaf maximum rate of carboxylation based on spectral analysis
- 26 November 2020
- journal article
- research article
- Published by Springer Science and Business Media LLC in Environmental Monitoring and Assessment
- Vol. 192 (12), 1-11
- https://doi.org/10.1007/s10661-020-08736-x
Abstract
The maximum rate of carboxylation in leaves (Vcmax) is an important parameter used to determine the photosynthetic rate. An accurate estimation of Vcmax is important for evaluating the photosynthetic capacity of vegetation productivity and the carbon budget of forest ecosystems. In this study, we measured the light use efficiency (LUE) and Vcmax of leaves and their corresponding spectral characteristics. Spectral analysis was used to find a modified photochemical reflectance index (PRI) of leaves to estimate LUE and thereby estimate leaf Vcmax. The results showed that the precision with which the modified ratio PRI index estimated LUE was significantly increased. The R2 of the estimation model was 0.69, and the root mean square error (RMSE) was 0.0024. The R2 of the model for estimating leaf Vcmax based on the LUE was 0.72, and the RMSE was 8.439 μmol/m2/s. The Vcmax values of conifer trees (Scots pine, Korean pine, and larch) were higher than those of broadleaf trees (white birch, Manchurian walnut, Siberian elm, Manchurian ash, Mongolian oak, Korean aspen, and Amur linden). This method avoids problem that conventional PRI is not sensitive to high leaf LUE values and provides important parameter data for the quantitative estimation of the gross primary productivity of forest ecosystems.Keywords
Funding Information
- The National Natural Science Foundation of China (31870621, 31500518, 31971580)
- the Fundamental Research Funds for the Central Universities (2572019CP12, 2572018BA03)
This publication has 29 references indexed in Scilit:
- Diverse photosynthetic capacity of global ecosystems mapped by satellite chlorophyll fluorescence measurementsRemote Sensing of Environment, 2019
- Decadal trends in photosynthetic capacity and leaf area index inferred from satellite remote sensing for global vegetation typesAgricultural and Forest Meteorology, 2018
- Leaf chlorophyll content as a proxy for leaf photosynthetic capacityGlobal Change Biology, 2017
- Retrieval of seasonal Rubisco-limited photosynthetic capacity at global FLUXNET sites from hyperspectral satellite remote sensing: Impact on carbon modellingAgricultural and Forest Meteorology, 2017
- The photochemical reflectance index: an optical indicator of photosynthetic radiation use efficiency across species, functional types, and nutrient levelsOecologia, 1997
- Regulation of Photosynthetic Light Energy Capture, Conversion, and Dissipation in Leaves of Higher PlantsPublished by Springer Science and Business Media LLC ,1995
- A narrow-waveband spectral index that tracks diurnal changes in photosynthetic efficiencyRemote Sensing of Environment, 1992
- Light-Induced Spectral Absorbance Changes in Relation to Photosynthesis and the Epoxidation State of Xanthophyll Cycle Components in Cotton LeavesPlant Physiology, 1989
- Photosynthesis and nitrogen relationships in leaves of C3 plantsOecologia, 1989
- Stomatal Conductance and PhotosynthesisAnnual Review of Plant Physiology, 1982