Symptom severity and virus titer of transgenic <i>N. benthamiana</i> T2 plants expressing SP/HrpZ<i>_Psph</i> and BNYVV-derived dsRNA in comparison to T2 plants expressing either SP/HrpZ<i>_Psph</i> or BNYVV-derived dsRNA, 30 days after challenge with BNYVV.

1<p>− absence of symptoms, + leaf curling, ++ faint mosaic, mild stunting, +++ severe mosaic, leaf distortion, general stunting.</p>2<p>−− value indicative of virus absence, + close to the positive threshold (three times the negative control), ++ half reading of positive control (non-transgenic), +++ equal to the positive control.</p>3<p>numbers denote number of plants in corresponding categories.</p>4<p>numbers denote percent of plants in corresponding categories.