TABLE 1.

Formation of pigmented halo and inhibition zone around F. oxysporum on PDA plates

Strain and FeCl3 presence	Colony color	Width of inhibition zone (mm)	Width of color halo (mm)
No FeCl3
DW2	Pink	4.5	3
DW2 ΔyvmC	White	1.5	0
DW2 ΔyvnA	White	2.0	0
DW2 ΔyvmA	White	2.0	0
DW2 ΔabrB	Pink	7.5	7
DW2 ΔyvmB	Pink	8.5	7.5
DW2 ΔyvnA ΔyvmB	Pink	8	7.5
FeCl3 (120 mg/liter)
DW2	Red	2.5	0
DW2 ΔabrB	Dark red	2	0
DW2 ΔyvmB	Dark red	2	0
DW2 ΔyvnA ΔyvmB	Dark red	2.5	0