Expression of genes representing the JA-signaling pathway in petiole tissues of noninfested control or PA-infested A17 and ‘Jester’ plants, at 24, 36, or 72 h after aphid infestation. A, Lipoxygenase (LOX2). B, Lipoxygenase (LOX3). C, VSP. D, PI. The relative transcript abundance of each gene was normalized to a tubulin gene and calculated using the formula 2^−ΔCT, where ΔC_T represents C_T of the gene of interest minus C_T of tubulin. Values are the mean and se of three biological replicates.