Figure 5

GC content of CEP coding sequences in plant families. Box plots show the median (center line), interquartile range (IQR, white box), range (whiskers) and outliers (circles). Outliers are defined as points more distant than 1.5 times the IQR from the median. Tukey’s test reveals that differences in GC content between all pairs of plant families except Brassicaceae-Fabaceae and Pinaceae-Rosaceae are statistically significant (P < 0.001).