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Stimulation of root hair growth 48h post-inoculation with Psm. (A) Appearance of root hairs after mock and Psm treatment (scale bar=200μm). (B) Length of root hairs of mock- (dark grey) and Psm-treated (light grey) seedlings for different mutant lines. Ratios calculated for Psm vs. mock-treated seedlings are shown in bold for each mutant line under the respective columns in the graph. Different letters indicate significant differences in length (P<0·05).
