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Updated: Jun 6, 2026

Evaluation of Photosynthetic Efficiency in Photorespiratory Mutants by Chlorophyll Fluorescence Analysis
Published on: December 9, 2022
Computational analysis of the oscillatory dynamics in the processes of CO₂ assimilation and photorespiration
Andrey Yu Dubinsky1, Alexander A Ivlev
1Institute of Geosphere Dynamics of Russian Academy of Sciences, Moscow 119334, Russia.
Abstract:
The computational analysis of the model system consisting of the processes of CO₂ assimilation and photorespiration shows the appearance of sustained oscillations in the system which might reflect their presence in photosynthesizing cells. Concentrations of CO₂ and O₂ oscillate in opposite phases causing Rubisco switching continuously between the carboxylase (CO₂ assimilation) and the oxygenase (photorespiration) reactions. The results of modeling are consistent with carbon isotopic and other observed data. They show that the oscillation period varies from about 1s to 3s depending on the values of parameters taken. Too high concentrations of O₂ suppress the oscillations.
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