Evolutionary Ecology of s-Triazine-Resistant Plants

Pleiotropic Photosynthetic Reorganization in the Chloroplast Chronomutant

Authored by: Jack Dekker

Handbook of Photosynthesis

Print publication date:  March  2016
Online publication date:  April  2016

Print ISBN: 9781482230734
eBook ISBN: 9781482230758
Adobe ISBN:

10.1201/b19498-53

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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.

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