Fig. 5

Pictures of the seedlings and roots of the HAV and the LAV cultivated in the axenic environment inoculated with Bacillus strain BpB13 (a) and promotion effects of Bacillus strain BpB13 inoculation on biomass and CIP bioaccumulation (b). The various lowercase letters indicate significant differences among different groups at p < 0.05 level according to one-way ANOVA. “*” represents the differences between BpB13 inoculation groups (B, CIP + B), and without BpB13 inoculation groups (control, CIP) are significant at p < 0.05, according to paired samples t-test, respectively. The CIP concentration was set as 0.2 mg/L