Fig. 4

Mean TMM-normalized FPKM values for the seven transcription factors found to be significantly differentially expressed between storage and fine roots in both Ipomoea batatas and Distimake dissectus at a FDR < 0.05. The heatmap depicts mean TMM-normalized FPKM values for orthologs of the transcription factors in each tissue type for all four species (bata = Ipomoea batatas, trif = I. trifida, diss = Distimake dissectus, and quin = D. quinquefolius). The heatmap was colored by percentile, where genes in the 10th percentile were colored yellow and those in the 90th percentile were colored dark blue. No ortholog of KN1 could be identified in the transcriptome assembly of I. trifida, and no ortholog of HAT22 could be identified in D. quinquefolius