Figure 2. RT-qPCR quantification of plum pox virus (PPV) in virus-infected apricots grafted onto transgenic plum rootstocks. Each value is the mean from three biological replicates, each a pool from three plants. For each biological replicate six repetitions were run. Asterisks indicate significant differences (P<0.05) with the reference sample (apricots grafted onto the susceptible St5’-7 rootstock) according to a one-tail Dunnett’s test.