Zinc phosphate protects tomato plants against Pseudomonas syringae pv. tomato

Abstract The purpose of this study was to determine whether zinc phosphate treatments tomato plants ( Solanum lycopersicum L.) can attenuate bacterial speck disease severity through reduction Pseudomonas syringae pv. Pst ) growth in planta and induce morphological biochemical plant defence responses. Tomato were treated with 10 ppm (25.90 µM) then spray inoculated strain DAPP-PG 215, race 0 . Disease symptoms recorded as chlorosis and/or necrosis per leaf (%) numbers necrotic spots. Soil protected susceptible against , reductions both pathogen combined significantly higher levels zinc-phosphate-treated indicated direct antimicrobial toxicity microelement, also confirmed by vitro assays. Morphological i e callose apposition) ., expression salicylic-acid-dependent pathogenesis-related protein PR1b1 gene) responses induced the treatment, demonstrated histochemical qPCR analyses, respectively. In conclusion, soil protect attacks activity induction