Figure 5.

Genes involved in cambium-xylem maintenance are disrupted in heterografted plants. Schematic overview of core regulators for cambium-xylem specification (A). Scaled expression of tomato and pepper orthologs for the genes involved in cambium-xylem maintenance (B). Expression pattern of SlWOX4 and CaWOX4 in self-grafted and heterografted plants. Bars show significant differential expression between time points (FDR <0.05 and log₂[fold change] >1 or < −1). Blue and red bars signify significant differential expression between pepper and tomato time points, respectively (C). Inferred regulatory interactions based on self-grafted tomato expression data for the genes included in B (D). Nodes are colored according to the magnitude of their variation in edge connections between the heterografts. Node size represents the number of outgoing interactions. WOX4 and its edges are highlighted in pink.