Dual Effect of the Cubic Ag₃PO₄Crystal on Pseudomonas syringae Growth and Plant Immunity

Abstract

We previously found that the antibacterial activity of silver phosphate crystals on Escherichia coli depends on their structure. We here show that the cubic form of silver phosphate crystal (SPC) can also be applied to inhibit the growth of a plant-pathogenic Pseudomonas syringae bacterium. SPC pretreatment resulted in reduced in planta multiplication of P. syringae. Induced expression of a plant defense marker gene PR1 by SPC alone is suggestive of its additional plant immunity-stimulating activity. Since SPC can simultaneously inhibit P. syringae growth and induce plant defense responses, it might be used as a more effective plant disease-controlling agent.

Structural transformation of Ag3PO4 and Ag3PO4/TiO2 induced by visible light and Cl− ions: its impact on their photocatalytic, antimicrobial, and antifungal performance

“…AgCl is prone to disintegration (to Ag + and Cl -) under VIS light irradiation. As reported (Kim et al, 2016), the newly formed Ag + ions induce the production of ROS by disrupting metabolic pathway and increase membrane permeability, which leads to bacterial cell death. Moreover, photogenerated chloride-based reactive species (e.g., chlorine and dichlorine radicals) disrupt the cell membrane (Dröge et al, 2002;Nishikiori et al, 2008;Watts et al, 2007).…”