found that
treatment with B. subtilis G1 enhanced the expression level
of the PR-Ia and PR-Ib genes and of plant-defense–related
genes NPR1 and CoiI, after TMV-challenged inoculation.
Beneficial rhizobacteria such as PGPR can also trigger
ISR by potentiating the activation of specific molecular
and cellular defense responses, which are activated more
quickly and potently than those activated during more
common infections