Expression levels of rsa1 in Ralstonia solanacearum SL2029 after growth for 24 h at 28 °C in MMG medium. β‐Glucuronidase activities were measured from strains SL2029 (1), SL2029 rsa1::Tn3‐gusA200 (2), SL2029 rsa1::Tn3‐gusA200(pRS20) (3), SL2029 rsa1::Tn3‐gusA200, hrpB::Ω (4) and SL2029 rsa1::Tn3‐gusA200, hrpB::Ω(pRS13) (5) as described in Experimental procedures and are averages of three experiments. One unit of β‐glucuronidase was defined as 1 nmol of 4‐methylumbelliferone released per bacterium per minute. Vertical bars indicate standard deviations.