"Here the authors show that stomatal closure to fungal chitin is conferred by the major PRRs for chitin recognition LYK5 and CERK1 the receptor-like cytoplasmic kinase PBL27 and the SLAH3 anion channel. PBL27 has the capacity to phosphorylate SLAH3 of which S127 and S189 are required to activate SLAH3."xsd:string