FIG. 1.

Differential response of SCV 20265 and the wild type (WT) to supplementation with different iron sources under iron depletion conditions. Iron-depleted VB agar plates were inoculated with bacteria and made replete by spotting of filter disks laid upon the agar with Fe³⁺ (100 mM), Fe²⁺ (200 mM), hemin (10 mM), or hemoglobin (0.1 mM). SCV 20265 shows significant growth around the disks in contrast to the wild type. The same results were obtained in more than three independent experiments.