Fig 1.

16S rRNA copy numbers per gram of fresh weight (g fw⁻¹) determined by Enterobacteriaceae-specific quantitative PCR. Log₁₀ values are shown for the rhizosphere (R), the endosphere (E), and soil (S) for the four investigated field sites: field 1, no herbicide treatment, no agro-forest; field 2, intensive herbicide treatment, no agro-forest; field 3a, no herbicide treatment, agro-forest; and field 3b, no herbicide treatment, no agro-forest. Error bars indicate confidence intervals at P = 0.005.