Fig. 4

Specific bacterial genera and ASVs are consistently enriched on hyphae in both experiments. A Venn diagram showing the occurrence of bacterial genera on hyphal and soil samples across 2 experiments. Genera with relative abundance below 0.1% were aggregated and categorized as lowly abundant that are not present here. B Relative abundance of bacterial genera that are consistently occurring on hyphal samples (outline of bars) and of genera that are consistently significantly enriched in hyphal samples (filled with purple color) of Experiments I and II compared to the abundance of these same genera in soil samples (filled with orange color). C Relative abundance of genera that are consistently significantly enriched in hyphal samples across the two experiments (Wilcox-test; *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001, ns: p > 0.05). ANPR*: Allorhizobium-Neorhizobium-Pararhizobium-Rhizobium. D Bar plots showing the mean relative abundance of six bacterial ASVs that are consistently enriched in hyphal compared to soil samples in both Experiments I and II. Significance levels for the ASVs exhibiting positive correlations with hyphal samples, as determined by Indicspecies, are denoted by asterisks (*p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001). Bacterial ASVs are labeled with a unique 4-letter ASV identifier and the lowest available taxonomic annotation. Colors indicate sample types; shapes of symbols indicate the microcosms of samples from which they are derived