Fig. 6

Hypothetical model for the role of Pf2826 in the biocontrol activity of Pseudozyma flocculosa. Blumeria graminis f. sp. hordei (Bgh) successfully supresses host immunity, colonizes, and causes disease on barley. When P. flocculosa is inoculated on Bgh- infected barley, Pf2826 is secreted and translocated to Bgh spores and the haustorium region of barley epidermal cells. Once translocated, Pf2826 interacts with Bgh candidate effector protein (CSEP) and barley HvPR-1a and chitinase. This interaction destabilizes Bgh-induced immunity suppression, resulting in the activation of an immune response and collapse of haustoria and powdery mildew colonies