Fig. 6.

Principal coordinate analysis (a) of bacterial communities in soils suppressive (filled circles) for AMF and in non-suppressive (open circles) soils (Expt. 2). Suppressive soils are defined as the soils where plant ³³P uptake was <1 kBq per pot. The analysis was made on Bray–Curtis dissimilarities between OTUs with 97% similarity. Relative abundances (b) of genus- or higher-level taxa that contribute to most of the variation between the bacterial communities in AMF-suppressive and non-suppressive soils identified by SIMPER analysis and are present in significantly different abundances in suppressive and conducive soils (Expt. 2). Taxa marked with an asterisk (*) were observed in significantly (ANOVA; P < 0.05) higher abundance in AMF-suppressive soils than in conducive soils