Co-occurrence network analysis unveils the actual differential impact on the olive root microbiota by two Verticillium wilt biocontrol rhizobacteria

Table 3 Main topological properties of co-occurrence networks of the different treatments examined in this study

Treatment	Similarity threshold	Total nodes	Total links	R² of power-law	Average degree (avgK)	Average clustering coefficient (avgCC)	Average path distance (GD)	Modularity (N. of modules)	Percentage of positive edges (PEP)
CON	0.67	178	283	0.898	3.18	0.058 b	4.860 a	0.672 (16) a	54.77%
PIC73	0.67	168	213	0.838	2.536	0.028 a	6.373 e	0.720 (16) b	49,77%
PICF7	0.67	176	219	0.961	2.489	0.060 c	6.540 f	0.760 (18) e	55.71%
Vd	0.69	140	189	0.926	2.7	0.093 e	6.094 d	0.739 (16) c	62.96%
PIC73_Vd	0.68	168	240	0.893	2.857	0.077 d	5.317 c	0.751 (16) d	62.08%
PICF7_Vd	0.67	183	277	0.87	3.027	0.109 f	5.247 b	0.677 (18) a	62.82%

Significant differences (p-values < 0.05) among treatments for avgCC, GD and modularity are shown in boldface. The number of modules of each network is indicated between brackets. Treatments: control (CON), Paenibacillus polymyxa PIC73-treated (PIC73), Pseudomonas simiae PICF7-treated (PICF7), Verticillium dahliae-inoculated (Vd), P. polymyxa/V. dahliae-inoculated (PIC73_Vd) and P. simiae/V. dahliae-inoculated (PICF7_Vd) plants. The different letters, where present, represent the results of the Tukey post-hoc test ( p-values < 0.05)

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