FIG. 7.

Bacterial growth and siderophore production in culture as iron is progressively more limited through the addition of 2,2-dipyridyl. Siderophores were measured in culture supernatants at 24 hpi. (A) P. syringae pv. tomato DC3000 growth (OD₆₀₀) and Ybt production (nmol). (B) P. syringae pv. tomato DC3000 growth (OD₆₀₀) and Pvd production (nmol). (C) Growth (OD₆₀₀) of P. syringae pv. tomato DC3000 compared with that of the pchA mutant. (D) Pvd production (nmol) by P. syringae pv. tomato DC3000 compared with that of the pchA mutant.