Figure 6

Schematic diagram of the predicted regulons in all strains. a) Putatively regulated genes have been vertically arranged in relation to their involvement in electron transport, symbiosis and nitrogen metabolism and other functions, while the genes without enough functional information are not reported in the diagram (see Table S3 for the complete list). Arrows indicate the presence of a predicted DNA-binding site upstream the indicated gene, with no inference about the role in the regulation of gene expression. Black gene names and arrows belong to core genome/regulons; red gene names and arrows belong to accessory genome/regulons. b) Details of the regulation of symbiosis-related genes among the three strains analyzed, Rm1021 (left), BL225C (middle) or AK83 (right); the color of the cell represents the absence of the gene (grey) or the presence of the gene (white, non-regulated or blue, regulated); only the scores above threshold are reported.