ABSTRACT
The nature of s-triazine-resistant (R) plants is a complex adaptive photosynthetic system arising as a consequence of a single base-pair lesion in the chloroplast psbA gene. The D-1 protein product of psbA is a key element of photosystem II electron transport. Altered electron transport in R causes a pleiotropic cascade of self-reorganization of interacting, interdependent functional traits. Order in this highly conserved photosynthetic system is emergent: a new homeostatic equilibrium among the plastids, cells, and organs of the whole-plant R phenotype emerges.
