Figure 1.

Contents of (a) Progoitrin, (b) Gluconapoleiferin, (c) Glucobrassicin, (d) 4-Methoxyglucobrassicin and (e) Neoglucobrassicin in leaves of clubroot-resistant (Aristoteles, Mendel, Creed) and -susceptible (Bender, Ladoga, Visby) cultivars of Brassica napus 35 days post inoculation (dpi) after mock inoculation (control) or artificial inoculation with either a less virulent isolate (P1, Hoisdorf) or a more virulent isolate (P1 (+), Grävenwiesbach) of Plasmodiophora brassicae. Contents represent the mean of six biological replicates, consisting of three plants each, from two independent experiments. Error bars represent the standard deviation. An analysis of variance (ANOVA) was performed to test the significance of main effects and interactions (for p-values see Supplementary Table S1). No significant differences were observed. DW, dry weight.