Fig. 7

Correlation network analysis depicting the interaction between metabolites and edaphic factors. Red and green lines indicate negative and positive associations, respectively (a). Topological features of networks displaying soil–plant associated metabolisms across all sites under CK (b), and Si (c), based on Spearman correlation method. Redundancy analysis (RDA) shows the association between metabolites and edaphic factors (d). Hierarchically clustered heatmap of the all metabolites taxa in the leaf, stem, root, bulk and rhizosphere soils under CK and Si treatments. Variations in the metabolites abundance from the overall mean concentration for each group are shown in red (high abundance) or blue (low abundance) (e)