Tissue enrichment of selected PME and PMEIs.

The fold-enrichment between the tissue sample with the highest transcript abundance and the lowest transcript abundance was calculated for each gene. This calculation was done separately for whole stem (WS) and stem peel (SP) samples. Fold enrichment is shown in a linear scale and is the mean of 3 measurements from 3 biologically independent samples. The p-value of the difference between the two points denoted was obtained by an ANOVA test that was followed by a Tukey’s multiple comparisons test using GraphPad Prism version 6.00 for Windows The asterisks denote the p-value as follows. *0.01–0.05; **0.001–0.01, ***0.0001–0.001; ****0.05). The values not shown are genes that were not detected in those tissues. The confidence interval (CI) was calculated by using one standard deviation of the difference of the dCT between the two tissues compared.