Fig. 6

The co-expression network of MtHAK genes in DEGs under salt and drought stresses, and GO enrichment analysis. A, B: Hierarchical cluster tree showing co-expression modules identified by WGCNA in M. truncatula under salt and drought stresses, respectively. The color rows below dendrograms indicate different module memberships. C, D: Heatmaps showing the expression profile of all the co-expressed genes in specific modules. Each row in the heatmap corresponds to an individual gene. Bar graphs (below the heatmaps) indicate the consensus expression pattern of the co-expressed genes within each module. E: Co-expression network in green, red, brown and blue module, respectively. The black dots indicate HAK hub genes; the red dots indicate genes directly related to MtHAK genes, and blue dots indicate genes that are not directly related to MtHAK genes; F: Co-expression network in green and turquoise module, respectively. G, H: GO enrichment analysis on HAK genes directly related with network under salt or drought stress in M. truncatula using Cytoscape. The blue triangle represents the GO term. I: VEEN map of directly related HAK genes screened under salt and drought stress in M. truncatula