Fig. 6.

Effect of the viral-induced silencing of the cPGK2 gene on PPV accumulation in Nicotiana benthamiana. a,The accumulation levels of cPGK2 transcripts and b, PPV RNA were measured by quantitative RT-PCR in the non-inoculated leaves at 6 dpi. The values represent means (± sd) of fold changes relative to the control (Mock). Each sample includes four to six biological replicates. The RNA levels were normalized to that of NbEF1. Means and standard errors are displayed as vertical bars. The phytoene desaturase (PDS) was used as positive control