Fig. 5

Significant co-occurrence network of bacterial communities associated with root systems of ungrafted and grafted grapevines. Interaction among the OTUs in root systems (root and rhizosphere fractions) of grafted (157.11, 161.49, 420A and SO4) and ungrafted (U.G.B.) grapevines. The nodes of each network are coloured according to phylum or class affiliation (97%) and sized according to degree of connection (Additional file 1: Table S13). The edges connecting the nodes are represented by green lines to indicate co-occurrence interactions and by red for mutualistic exclusions (Additional file 1: Table S14). Relative abundance of those nodes with degree of connection in the third percentile is reported at the phylum/class level in the bar chart for each grape type