The described model represents a control circuit. Another example for control is the phototropic bending of an Avena - coleoptile . The coleoptile bends towards a light source when just one of its sides is exposed to light. The bending is caused by an auxine gradient within the tissue. After the signal is removed does the auxine gradient break down and the growth of the coleoptile proceeds into another direction.
Lateral inhibition is very common both in the animal and the plant kingdom.
Zones of high activity alternate regularly with indifferent zones. Suitable' values render different solutions depending on the choice of the parameters and the starting situation. The solutions of the equations represent structural models that mirror the spatial and temporal pattern development. In that way can, for example, the development of a leaf primordium during the shoot growth of a plant be simulated. The distribution of cells or organs within a two-dimensional field as in the case of guard cell distribution or hairs at the surfaces of leaves is a possible application, too.