qRT-PCR based transcription profiling of the globe artichoke genes Met1, Cmt2-like, Cmt3-like, Drm2-like, Drm3-like and Demethylase-like in the leaf, root, receptacle and bracts.

The globe artichoke gene actin was used as the reference sequence. Numbers on “X” axis represent tissue names:1- leaf; 2-root; 3-receptacle, 4- stage 1 bracts; 5- stage 2 bracts, and 6- stage 3 bracts. Error bars represent SD (n = 3, biological replicates). Different letters associated with the set of means indicate a significant difference based on Tukey’s test (P≤0.05) on the basis of the ANOVA analysis.