a salicylic acidinduced lectinlike protein plays a positive role in the effectortriggered immunity response of arabidopsis thaliana to pseudomonas syringae avrrpm1 salicylic acid sa is one of the key hormones that orchestrate the pathogeninduced immune response in plants this response is often characterized by the activation of a local hypersensitive reaction involving programmed cell death which constrains proliferation of biotrophic pathogens here we report the identification and functional characterization of an sainduced legume lectinlike protein 1 saillp1 which is coded by a gene that belongs to the group of early saactivated arabidopsis genes saillp1 expression is induced upon inoculation with avirulent strains of pseudomonas syringae pv tomato via an sadependent mechanism constitutive expression of saillp1 restrains proliferation of p syringae pv tomato avrrpm1 and triggers more cell death in inoculated leaves cellular and biochemical evidence indicates that saillp1 is a glycoprotein located primarily at the apoplastic side of the plasma membrane this work indicates that saillp1 is involved in resistance to p syringae pv tomato avrrpm1 in arabidopsis as a component of the samediated defense processes associated with the effectortriggered immunity response