Fig. S1 Discriminant principal component analysis (PCA) performed on chromatographic data obtained for each methanolic root extract of maize inoculated or not with Azospirillum lipoferum CRT1 in separate experiments.

Fig. S2 Pair-wise comparisons of the intensity (%) of the main secondary metabolites identified in maize cultivars, based on all root and shoot samples from both cultivars and all treatments.

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