Fig. 4

Box plots of the Shannon indices of bacteria and fungi in the root and rhizosphere soil for GE, GD_roadside, GD_understory and GA. A: in the roots of Geodorum at the 16S OTU level; B: in the rhizosphere soil of Geodorum at the 16S OTU level; C: in the roots of Geodorum at the ITS OTU level; D: in the rhizosphere soil of Geodorum at the ITS OTU level. *P ≤ 0.05. GA, Geoderma attenuatum; GD, Geodorum densiflorum; GE, Geodorum eulophioides; ITS, internal transcribed spacer; OTU, operational taxonomic unit