Effect of growth rate on transcript concentration. mRNA concentrations (4254 genes) are expressed in arbitrary units per g of dry cell weight. (A) Box plots of transcript concentrations at the four growth rates. Values are separated into four quartiles by horizontal bars. The central bar (in the middle of the rectangle) represents the median value. (B) Venn diagrams identify down-regulated transcript concentrations (green diagram) and up-regulated transcript concentrations (red diagram) common to the different growth rates (P-value < 0.01). (C) Clusters of mRNA concentration. Mean values and confidence intervals at 95% of the ratios of mRNA concentration are given in the three clusters (cluster 1, cluster 2, cluster 3) from left to right 0.20 versus 0.10 h−1, 0.40 versus 0.20 h−1 and 0.63 versus 0.40 h−1.
