Figure 5

Epigenetic control of transcription rate Q ₁₀ in Arabidopsis . (A) The frequency distribution of chromatin marks among genes with differing temperature coefficients of transcription. Data (from Coleman-Derr et al. [20] and Luo et al. [21]) show the percentage of genes in each Q₁₀ category with each epigenetic character. Numbers of genes in each Q₁₀ group are 0 < Q₁₀ < 1, 41; 1 < Q₁₀ < 2, 527; 2 < Q₁₀ < 3, 2,039; 3 < Q₁₀ < 4, 2,447; 4 < Q₁₀ < 5, 1,389; 5 < Q₁₀ < 6, 526; 6 < Q₁₀ < 7, 174; 7 < Q₁₀ < 8, 82. (B) Pie charts showing the distribution of Q₁₀s of transcription rates for genes increased, decreased or unchanged in arp6 loss of function lines, using data from Kumar and Wigge [2]. (C) Box plot to show median, 50% of data and 95% of data distributions for transcription rate Q₁₀s for ARP6 down-regulated genes (D), up-regulated genes (U) and genes with ARP6-independent expression (N). Asterisks show that the transcription rate Q₁₀s for genes with increased or decreased abundance in arp6 are significantly different from the genes with ARP6-independent expression (P = 0.0003 for genes decreased in arp6 and for increased P = 0.0001).