Fig. 4.

A. Root length of A. thaliana seedlings non-exposed (bars in white) and exposed to 1 mg l⁻¹ 2,4-DNT for 9 days (bars in grey) in the absence or presence of consortia UHS1, UHS2, UHS3 (10⁶ cfu ml⁻¹). Values are mean ± standard error of at least 15 biological replicates. (Significance level versus control: *** P < 0.001, non-parametric Kruskal–Wallis test). B. Pictures of root hairs were taken under the binocular (20×) of (a) un-inoculated 2,4-DNT exposed plants and (b) 2,4-DNT exposed plants inoculated with UHS3.