Multi-scale Modeling to explain Wine Fermentation

摘要

This work addresses the multi-scale modelling of wine fermentation driven by a particular wining yeast, S. cereviesiae T73. Basically, we define an extracellular kinetic model which describes the dynamics of relevant metabolites and use the model to constrain a genome-scale metabolic model. The model is solved using dynamic flux balance analysis approach. The flux distribution is computed at each instant by solving a linear programming problem which considers the extracellular model as constraints and biomass maximization as the cellular objective. The model successfully explains growth and cell death measured in terms of OD600, biomass dry-weight and number of colony forming units as well as the relevant extracellular metabolites, measured by high-performance liquid chromatography. Also, the model provides the metabolic flux dynamics compatible with experimental data.