Supplementary data are available at JXB online. Supplementary Table S1 contains a full listing of all genes upregulated by MJ at harvest in peach fruit. Supplementary Table S2 contains a full listing of all genes downregulated by MJ at harvest in peach fruit. Moreover, a detailed description of oligonucleotide synthesis and microarray construction, microarray hybridization, transcript profiling using the lPEACH1.0 microarray, and data analysis is provided (Materials and methods).