(a to f) PERMANOVA output showing importance of fraction, soil, and plant species as factors shaping the microbial community of prokaryotes (a and b), eukaryotes (c and d), and fungi (e and f). The pseudo-F value is used as a proxy for the importance of the factor. Plots represent factor importance using the all data (a, c, and e) and for specific fraction and soil (b, d, and f). B, bulk soil; RS, rhizosphere; RP, rhizoplane; RA, root associated; n, number of samples used in the analysis.