Fig. 1
The expression levels of mentioned T3SS proteins were significantly induced in nutrition-limited medium. A–H The expression level of T3SS regulators, effectors and structural protein in four model pathogenic bacteria were measured using the transcriptional and translational fusion reporters in 1× T3SS-inducing media and 1× T3SS-suppressing media, including HrpLPS, HopG1PS, HrpRPS, HopX1PS, HrpA2PS, PopNPA, Hpa1XO, and HrpGRS. I The translational ERs of the tested T3SS regulators, effectors and structural protein in 1× T3SS-inducing media and 1× T3SS-suppressing media. *p < 0.05; **p < 0.01; and ***p < 0.001. Results were indicated in mean ± SD. All experiments were repeated at least three times