Effects of Mtrlk mutation on global gene expression in roots of M. truncatula. A) KEGG enrichment analysis of upregulated DEGs in the WTR_1d/mutR_1d group. B) KEGG enrichment analysis of downregulated DEGs in the WTR_1d/mutR_1d group. C and D) Hierarchical clustering analysis of the changes in upregulation and downregulation of symbiosis and defense genes in the WTR_1d/mutR_1d group. E) KEGG enrichment analysis of upregulated DEGs in the WTR_6d/mutR_6d group. F and G) Hierarchical clustering analysis of the changes in upregulation and downregulation of symbiosis and defense genes in the WTR_6d/mutR_6d group. The colored scales vary from light to dark, which indicate the levels of genes expression.