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Expression levels of DNA methylation/demethylation genes during a PLPV infection. RT-qPCR analysis of mRNA levels of the selected genes in systemic leaves from mock-inoculated (green) and PLPV-infected plants (red) harvested at 34 d.p.i. Bars depict standard deviations from three independent biological replicates and the statistical significance was tested using a paired t-test (* p < 0.05; ** p < 0.01).
