Fig. 4
Spatial and temporal expression patterns of CsPMEs in 4 fruit tissues at 6 development stages in navel orange. Four fruit tissues including albedo (AL), epicarp (EP), juice sacs (JS), and segment membrane (SM), and six fruit development stages including 50 DAF (stage 1), 80 DAF (stage 2), 120 DAF (stage 3), 150 DAF (stage 4), 180 DAF (stage 5), and 220 DAF (stage 6). The PME genes were clustered according to their phylogenetic relationship. The color scale of heatmap represents the log2-transformed FPKM values. Dark red indicates high expression; light red indicates intermediate expression; and white indicates no expression