FIG. 3.

dinF and acrA are highly expressed in planta. The GUS activities produced by strains carrying a dinF::uidA or acrA::uidA transcriptional fusion were measured for cells grown to different cell densities in planta (susceptible tomato) and in vitro (minimum broth). The cell density (expressed in CFU/ml of broth or xylem fluid) is indicated on the x axis. The data are the averages ± standard errors of the means for three independent experiments performed with six plants per treatment. (A) acrA expression (in R. solanacearum strain K60 with pVOacrA); (B) dinF expression (in R. solanacearum strain K60 with pVOdinF).