A biochemical model of photosynthetic CO2 assimilation in leaves of C3 species |
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| Authors: | G D Farquhar S von Caemmerer J A Berry |
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| Institution: | (1) Department of Environmental Biology, Research School of Biological Sciences, Australian National University, P.O. Box 475, 2601 Canberra City, ACT, Australia;(2) Department of Plant Biology, Carnegie Institution of Washington, 94305 Stanford, Cal., USA |
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| Abstract: | Various aspects of the biochemistry of photosynthetic carbon assimilation in C3 plants are integrated into a form compatible with studies of gas exchange in leaves. These aspects include the kinetic properties of ribulose bisphosphate carboxylase-oxygenase; the requirements of the photosynthetic carbon reduction and photorespiratory carbon oxidation cycles for reduced pyridine nucleotides; the dependence of electron transport on photon flux and the presence of a temperature dependent upper limit to electron transport. The measurements of gas exchange with which the model outputs may be compared include those of the temperature and partial pressure of CO2(p(CO2)) dependencies of quantum yield, the variation of compensation point with temperature and partial pressure of O2(p(O2)), the dependence of net CO2 assimilation rate on p(CO2) and irradiance, and the influence of p(CO2) and irradiance on the temperature dependence of assimilation rate.Abbreviations RuP2
ribulose bisphosphate
- PGA
3-phosphoglycerate
- C=p(CO2)
partial pressure of CO2
- O=p(O2)
partial pressure of O2
- PCR
photosynthetic carbon reduction
- PCO
photorespiratory carbon oxidation |
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| Keywords: | Electron transport Leaf model Light and CO2 assimilation Ribulose bisphosphate carboxylase-oxygenase Temperature Photosynthesis (C3) |
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