Effect of suppressors of RNA silencing (VSR) derived from different RNA and DNA viruses and expressed as transgenes in lines of <i>N. tabacum</i> cv Xanthi on the development of symptoms and induction of the recovery phenotype upon infection of AILV-V.

*Transgenic plant line expressing the following VSR: P1 from Cocksfoot mottle virus (P1 CfMV) and from Rice yellow mottle virus (P1 RYMV), Hc-Pro from Potato virus Y (PVY), AC2 of African cassava mosaic (ACMV), P25 from Potato virus X (PVX), 2b from Cucumber mosaic virus (CMV) and P19 from Tomato bushy stunt virus (TBSV). Symptoms were recorded between 3 and 50 dpi with AILV-V. VC = vein clearing; LR = local ringspots; RS = systemic ringspots; M = mosaic; B = leaf blistering R = recovery. WT = untransformed N. tabacum cv Xanthi; pBin61 = empty vector.