Figure 1.

Symptoms in ‘Rutgers’ and ‘Moneymaker’ tomatoes infected with potato spindle tuber viroid (PSTVd). (A) At 3 weeks post-inoculation (wpi), PSTVd-infected ‘Rutgers’ tomatoes showed severe stunting and leaf curling. At 4 wpi, ‘Moneymaker’ tomatoes showed stunting during PSTVd infection, and mild leaf curling was observed only in PSTVd-AS1 infection. (B,C) Severe stem and vein necrosis, accompanied by yellowing or mild stem necrosis (indicated with a red arrow), was observed in ‘Rutgers’ and ‘Moneymaker’ tomatoes, respectively, after PSTVd-AS1 infection.