Stage-specific regulatory networks. Putative target gene networks at different floral stages reflecting preferential binding of AP1 and SEP3 at different time points (Figure 2) and making use of GO category enrichment analysis for differentially bound genes across the time points (Additional file 3: Figure S2B). Here, we focused on a selection of representative GO categories: meristem development, meristem maintenance, regulation of flower development, axis specification, and floral organ development (sepal, petal, stamen, and carpel development). We included only genes that belong to these categories and that were found to be preferentially bound by either AP1 or SEP3 on a comparison of floral stages 4 and 7/8 (corresponding to day 4 and day 8 in our data). Black line indicates common targets, while pink line indicates AP1-specific targets, and green line indicates SEP3 targets. Dashed lines are used to indicate gene with significant (FDR <0.001) TF-binding peak, while solid lines for genes with higher peak respectively at stage 4 or stage 8. In gray are genes not bound at the specific stage. In red are represented upregulated genes while in blue downregulated genes from day 4 to 8.