Figure 3.

The IAA concentration in the root of switchgrass cv Alamo. Control = noninoculated control plant without Cd stress; Cd = noninoculated Cd-control plant with 20 µ mol L⁻¹ CdCl₂ stress; Bc09, So23, E02, Oj24, and Mixed (combination of the four strain) = plant inoculated with endophytic PGPB without Cd stress; and Bc09 + Cd, So23 + Cd, E02 + Cd, Oj24 + Cd, and Mixed + Cd (combination of the four strain) = plant inoculated with endophytic PGPB with 20 µ mol L⁻¹ CdCl₂ stress. The bar represents ±SE (n = 5). Columns not sharing a significance letter are significantly different according to Duncan’s Multiple Range Test at p < 0.05. The dash pattern indicates the biomass of that treatment is significantly different among the treatments.