Figure 4

Venn diagram of S. meliloti differentially regulated genes identified in microarray experiments. The diagram represents the number of differentially expressed genes obtained in six different microarray experiments (based on additional file 1). The transcriptomes of S. meliloti 1021FDC5 cells obtained after growth in liquid, solid or semisolid MM were compared. For each of the three combinations, changes in the mRNA levels were monitored after 7 and 14 hours of growth. The different subsets have been assigned with letters (A-G). Surface responsive genes are indicated with stripes and swarming responsive genes with dots.