Figure 1.
The Pectobacterium carotovorum ssp. brasiliense (Pcb1692) expI gene is required for virulence in potato tubers. Potato tubers (Solanum tuberosum cv. Mondial) were inoculated with 1 × 108 colony‐forming units (cfu)/mL of Pcb1692WT (wild‐type), Pcb1692ΔexpI and Pcb1692ΔexpI_expI complemented mutant strain. The average weight of macerated potato tissue was calculated at 72 h post‐inoculation (hpi). Error bars denote significant differences in virulence between the wild‐type and complemented strain compared with the mutant strain according to Student's t‐test (P > 0.05).