Figure 1.

Typical assay to identify transformants with reduced pathogenicity or virulence. Ten‐day‐old tomato seedlings were mock inoculated (M) or inoculated with conidiospores of wild‐type Verticillium dahliae (WT) or random T‐DNA insertion mutants. At 21 days post‐inoculation, the plants were scored for disease development by comparing plants inoculated with wild‐type V. dahliae with those inoculated with the T‐DNA insertion mutants. The sides (top) and tops (bottom) of plants inoculated with five T‐DNA insertion mutants that are impaired in aggressiveness are shown.