Fig. 1.

Schematic build-up of the full turgor-driven growth FSPM containing all the interactions and influences within the model. The model is driven by an independently acting environment (yellow), fixed genotype-dependent parameters (black) and the planting composition (dashed). Internally, the plant/canopy structure (green) is interwoven with the plants functioning affecting, and being affected by, various plant variables (blue) and sub-models (orange). Due to the complexity of the feedback loops within this system, plant morphology is considered fixed at the start of each (hourly) simulation step for the purpose of independently calculating respiration, photosynthesis, transpiration and xylem transport resistance. These values are then used to dynamically calculate water transport and turgor-driven growth. At the end of the simulation step, individual organ sizes are then updated, in turn changing canopy structure. Such an approach vastly increased model stability and performance as it removed some of the inherent dependencies of the model and allowed a single light model calculation per time step.