Fig. 4From: Metabolite profiling during graft union formation reveals the reprogramming of primary metabolism and the induction of stilbene synthesis at the graft interface in grapevinePrinciple component (PC) analysis of the key metabolites measured in the scion (blue), graft interface (red) and rootstock (green), a scores plot of the projection of individual observations on PC1 and PC2, and b variable loading plotBack to article page