Figure 4.

Investigation of lipopolysaccharide (LPS) mobilization using capillary zone electrophoresis. After treatment of Arabidopsis leaves with 100 µg/mL fluorescently labelled LPS from Salmonella minnesota (LPS_S.min.), leaves were harvested at the indicated time points and veins (local leaves) or whole leaves (systemic leaves) were investigated. The LPS signal (dark red arrows) became visible after 1 and 6 h in local midribs and after 24 h in systemic leaves. An additional peak indicative of nonbound fluorescein was also observed (orange arrow). rfu, relative fluorescence units.