Figure 2.

Major pathways controlling the expression of Ralstonia solanacearum virulence genes. Ovals and squares indicate regulatory proteins, the latter representing the main regulatory hubs. Grey, regulatory inputs sensed by the bacterium; black, pathogenic activities controlled by this regulatory network. Arrows and T‐bars indicate activation or repression, respectively. Black lines denote control at the transcriptional level and red lines indicate post‐transcriptional effects. Full lines represent major effects and dotted lines slight transcriptional influences (modulation). For detailed explanations, see text. EPS, exopolysaccharide; HDF, Hrp‐dependent factor; 3‐OH PAME, 3‐hydroxy palmitic acid methyl ester; T3SS, type III secretion system.