Root ethylene mediates rhizosphere microbial community reconstruction when chemically detecting cyanide produced by neighbouring plants

Table 2 Topological properties of the empirical molecular ecological networks of microbial communities in treatments

Network metrics	Treatments
Network metrics	CRi	BSi	PRi	PRm	BSm
Empirical networks
Number of nodes	121	148	139	121	146
Number of edges	309	309	357	289	283
Number of positive correlations	184	180	194	194	147
Number of negative correlations	125	129	162	95	136
Ratio of positive to negative correlations	1.47	1.40	1.20	2.04	1.08
Average connectivity (avgK)	5.11	4.18	5.14	4.78	3.88
Average path distance (GD)	4.50	4.66	4.13	5.06	5.17
Average clustering coefficient (avgCC)	0.30	0.27	0.31	0.33	0.26
Graph density	0.043	0.028	0.037	0.040	0.027
Number of modules^a	5	6	8	6	9
Modularity	0.48	0.64	0.53	0.67	0.60
Random networks
GD ± SD	3.05 ± 0.07	3.59 ± 0.06	3.12 ± 0.05	3.22 ± 0.06	3.62 ± 0.07
avgCC ± SD	0.10 ± 0.02	0.03 ± 0.01	0.07 ± 0.01	0.06 ± 0.01	0.05 ± 0.01
Modularity±SD	0.36 ± 0.01	0.36 ± 0.01	0.37 ± 0.01	0.31 ± 0.01	0.28 ± 0.01

^aThe number of modules with ≥ 5 nodes in the networks. CRi cassava rhizosphere soil in the intercropping experiment, BSi bulk soil 20 cm away from the peanut and cassava plants, PRi peanut rhizosphere soil in the intercropping experiment, PRm peanut rhizosphere soil in the monocropping experiment, BSm bulk soil 20 cm away from peanut plants in monocropping system

ISSN: 2049-2618