Heterotrimeric G-Protein Signaling in Plants

Abstract

Heterotrimeric GTP-binding proteins comprised of Gα, Gβ, and Gγ subunits are key regulators of a multitude of signaling pathways in all eukaryotes. In plants, these proteins are currently a focus of intense research due to their involvement in affecting many agronomically important traits such as seed yield, organ size, abscisic acid (ABA)-dependent signaling and stress responses, plant defense responses, symbiosis, and nitrogen use efficiency. The mechanistic details of G-protein signaling in modulating these processes remain largely unknown.