Local and systemic suppression of PTGS in plants by TYLCV-C infection and transient expression of the C2 protein. GFP transgenic line 16c plants were observed under long-wavelength UV illumination through a yellow filter. Plants were agroinfiltrated with 35S-GFP transgene alone (A and B) or together with pBinTYLCV-C (C and D), pBin1.3A (E and F), pBin35S-C2 (G and H), and pBin35S-mC2 (I and J). Photographs were taken at 30 days post-agroinfiltration for infiltrated leaves (A, C, E, G, and I) and noninfiltrated young leaves (B, D, F, H, and J).