Fig. 2

Alpha-diversity (Shannon index) for fungi (A) and for bacteria (B) present in bulk soils, rhizosphere soils, roots, and stems of A. mongholicus plants grown in Field I and Field II. Statistical comparisons were made used the paired Wilcoxon rank-sum test, with significance denoted by asterisks: * p < 0.5, *** p < 0.001. Values shown are the median ± SDs (n = 3)