Theoretical analysis of a temperature-dependent model of respiratory O₂ consumption using the kinetics of the cytochrome and alternative pathways.

ABSTRACT: Temperature dependence of plant respiratory O₂ -consumption has been empirically described by the Arrhenius equation. The slope of the Arrhenius plot (which is proportional to activation energy) sometimes deviates from a constant value. We conducted kinetic model simulations of mitochondrial electron flow dynamics to clarify factors affecting the shape of the Arrhenius plot. We constructed a kinetic model of respiration in which competitive O₂ -consumption by the cytochrome pathway (CP) and the alternative pathway (AP) were considered, and we used this model to describe the temperature dependence of respiratory O₂ -consumption of Arabidopsis. The model indicated that the electron partitioning and activation energy differences between CP and AP were reflecte

SUBMITTER: Inoue T 

PROVIDER: S-EPMC7821261 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature