title: Computational analysis of the oscillatory dynamics in the processes of CO₂ assimilation and photorespiration.
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.
authors.affiliation: Institute of Geosphere Dynamics of Russian Academy of Sciences, Moscow 119334, Russia.
authors.forename: Andrey Yu
authors.initials: AY
authors.lastname: Dubinsky
authors.forename: Alexander A
authors.initials: AA
authors.lastname: Ivlev
mesh_terms: D001683:Biological Clocks / Q000502:physiology*; D002245:Carbon Dioxide / Q000378:metabolism*; D019069:Cell Respiration / Q000502:physiology; D019295:Computational Biology / Q000379:methods; D008954:Models, Biological; D010100:Oxygen / Q000378:metabolism*; D010788:Photosynthesis / Q000502:physiology*; D010944:Plants / Q000378:metabolism*; D012273:Ribulose-Bisphosphate Carboxylase / Q000378:metabolism
chemical_list: D002245:Carbon Dioxide; D012273:Ribulose-Bisphosphate Carboxylase; D010100:Oxygen