A Salicylic Acid–Induced Lectin-Like Protein Plays a Positive Role in the Effector-Triggered Immunity Response of Arabidopsis thaliana
Armijo, G. ; Salinas, P. ; Monteoliva, M.I. ; Garcia, C. ; Seguel, A. ; Villarroel-Candia, E. ; Song, W. ; Krol, A.R. van der; Alvarez, M.E. ; Holuigue, L. - \ 2013
Molecular Plant-Microbe Interactions 26 (2013)12. - ISSN 0894-0282 - p. 1395 - 1406.
systemic acquired-resistance - multiple sequence alignment - hypersensitive cell-death - disease resistance - plant defense - plasma-membrane - gene encodes - receptor - expression - rin4
Salicylic acid (SA) is one of the key hormones that orchestrate the pathogen-induced 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 SA-induced legume lectin-like protein 1 (SAILLP1), which is coded by a gene that belongs to the group of early SA-activated Arabidopsis genes. SAI-LLP1 expression is induced upon inoculation with avirulent strains of Pseudomonas syringae pv. tomato via an SA-dependent mechanism. Constitutive expression of SAI-LLP1 restrains proliferation of P. syringae pv. tomato Avr-Rpm1 and triggers more cell death in inoculated leaves. Cellular and biochemical evidence indicates that SAI-LLP1 is a glycoprotein located primarily at the apoplastic side of the plasma membrane. This work indicates that SAI-LLP1 is involved in resistance to P. syringae pv. tomato Avr-Rpm1 in Arabidopsis, as a component of the SA-mediated defense processes associated with the effector-triggered immunity response.