Interaction between Cell Wall and Plasma Membrane via RGD Motif is Implicated in Plant Defense Responses

Abstract

Integrin- and vitronectin-like proteins were found to exist in the pea plasma membrane and cell wall, respectively. The hexapeptide GRGDSP but not GRGESP inhibited either the binding of cell wall protein(s) to plasma membrane protein(s) or the defense response. A possible role of linkage via RGD motif in plant defenses is discussed.