Figure 2. Hypothetical representation of a whole-plant network interrelationship model. The plant system can be modeled as suggested by Lucas and colleagues,⁸ whereby a series of nodes are connected to neighboring nodes and the surrounding environment. Functions association with edge nodes could include water and nutrients fluxes. Hierarchical functions could be assigned to hub nodes (large purple nodes) allowing the determination of which signals to pass to corresponding networks at higher-levels of biological organization.