Fig. 4

The curative effects of compound 1 and ningnanmycin on TMV. Tobacco seedlings infected with TMV to be treated (a − c), negative control (treated with equal concentration of 1% DMSO and sterile distilled water solution) (d), treated with 100 μg/mL ningnanmycin (e) and compound 1 (f). Photos were taken 20 days after treatment. CK^– (negative control), 1 − 3 (5, 10, 20 days after treatment with ningnanmycin), 4 − 6 (5, 10, 20 days after treatment with compound 1), M (healthy tobacco leaves)