Fig. 5
Co-occurrence network of rhizosphere soils showing strong and significant correlations. The network is colored by AMF/protist/nematode taxa (a) and modules (b) with all the fungivorous protists and nematodes being listed, respectively. Modules I−IV represent four clusters with closely interconnected nodes. Size of each node is proportional to the number of connections (degree), and the thickness of each connection between two nodes (edge) is proportional to the value of correlation coefficients. Blue edges indicate positive, red edges negative connections. c, Correlation coefficients between module eigengenes, soil properties, AMF colonization, expression of ZMPht1;6 gene, and plant productivity. Bold values denote significant relationships. SOM, soil organic matter; SWC, soil water content; TN, total nitrogen; TP, total phosphorus; TK, total potassium; NH4−N, ammonia nitrogen; NO3−N, nitrate nitrogen; AP, available phosphorus; AK, available potassium. ***P < 0.001; **P < 0.01; *P < 0.05