Fig. 1.

Lon genes in Arabidopsis show distinct expression profiles derived after gene duplication. (A and B) Heatmap plot of Lon gene expression obtained by (A) RNA-seq and (B) microarray data analysis. (C) The evolutionary context of CREs in Lon4 and Lon1 promoters contributes to their differential expression pattern in floral organs. Lon4 contains specific CREs, depicted in blue, associated with expression restricted to pistils, which are absent from Lon1. Numbers in red and black depict the plethora of CREs in Lon4 and Lon1 promoters, respectively. Genes in green were identified by Lon4 gene co-expression analysis (Supplementary Fig. S2A). Graphical representations of CREs do not correlate with their exact position.