Induction of the phenylpropanoid pathway (PP), lignin and flavonoid pathways during fruit development. A heat map is shown for all significant PP, lignin and flavonoid pathway genes from the combined peach and apple microarray data. Log2-fold expression scale is shown at top. Developmental times are indicated as days after bloom along with a fruit image stained for lignin deposition. Gene abbreviations are listed along with colour coded bars indicating the corresponding pathway. A sketch of the PP, lignin and flavonoid pathways is shown on the right. Names for induced genes as determined from the array data are shown in bold.