Figure 4.
Characterization of Siderophores Produced by F. oxysporum.
Siderophores were analyzed by MS/HPLC of culture supernatants (A) and cellular extracts (B) after iron saturation. In the representative HPLC chromatograms, the y and x axis denote absorption at 430 nm and retention time in minutes, respectively. Note that deletion of hapX leads to a decrease in degradation of FsC to linear FsC and (fusarinine)2 as well as to higher production of ferricrocin and ferrichrome C. Mol. Mass, molecular mass; R, ΔhapX/wild-type (wt) ratio of siderophore production.