Fig. 1.

Conceptual model showing the potential low-P target points in the signalling events leading to the alteration of root architecture. Solid arrows indicate links established in the induction of root development, and dashed lines denote indirect or as yet undescribed pathways. A bar at the end of a line indicates inhibition. Different colours indicate different regulatory signals. This model is developed based principally on information from arabidopsis and white lupin.