Figure 2.

The relative abundance of bacterial genera associated with the bulk soil, rhizosphere and endosphere of Tropaeolum majus determined through 16S rRNA amplicon metagenomic sequencing. Asterisks next to the genus name indicate that there is a significant difference. Different letters above error bars indicate which sampled site showed significant differences (Tukey’s test or Mann–Whitney U test, p < 0.05). (A) Up to 40% relative abundance, (B) up to 7% relative abundance and (C) up to 3% relative abundance.