Modelling of Agaricus bisporus Respiration Rate Based on Enzyme Kinetics

The aim of this paper is to characterise the respiration rate of Agaricus bisporus as affected by MAP at 5, 10, 15 and 20°C. The experimental in-pack partial pressures of O2 and CO2 under all treatments was described for a storage period of 15h. A respiration model, based on Michaelis-Menten type enzyme kinetics, was proposed for predicting respiration rates of Agaricus bisporus as a function of O2 and CO2 volume fraction at the storage temperature. The relationship between maximum rate vm and temperature T was well described by the Arrhenius equation. The results suggest that, the respiration rate of Agaricus bisporus as well as vm increased with temperature, and it has a linear relationship between lnvm and T-1. Results of the study can be applied to the MAP design for Agaricus bisporus.