The objectives of the present study were: (i) to investigate theinfluence of specific PGPR inocula (B. amyloliquefaciens IN937a, B.pumilus SE34, B. subtilis FZB24 and GB03) on persistence behav-ior and fate of ASM in the rhizosphere of tomato plants undergreenhouse conditions, (ii) to evaluate the root uptake and sys-temic translocation ability of ASM in aerial tomato parts, and (iii)to determine the population dynamics of the PGPR strain B. subtilisGB03 at the tomato root system and soil, spiked with or withoutASM