Fig. 3.

Infectivity properties of SON41p^WT and the PVY mutants SON41p^ID1, SON41p^ID2, and SON41p^OD2 on Yolo Wonder host. (A) Number of symptomatic plants observed after inoculation of SON41p^WT and the PVY mutants SON41p^ID1, SON41p^ID2, and SON41p^OD2 on Yolo Wonder host for the two independent experiments conducted in 2015 and 2016. Values indicate numbers of infected plants (symptoms and/or virus accumulation) among inoculated plants; (B) DAS-ELISA determination of PVY relative accumulation on Yolo Wonder pepper host at 36 days post inoculation. White and grey bars represent data obtained in the 2015 and 2016 experiments, respectively. Within each experiment, no significant differences were observed between the four PVY variants (Mann–Whitney U tests; P-values > 0.05). Standard deviations are indicated on each bar.