Table 1.

Effect of Different Nitrogen Sources on Cellophane Penetration by F. oxysporum

Nitrogen Source (50 mM)Cellophane Penetration
NaNO3+
NH4NO3
(NH4)2SO4
(NH4)2C4H4O6
Casaminoacids+
Arg+
Glu+
Gln+/−
Met+
Pro+
  • Fungal colonies were grown for 4 d at 28°C on top of cellophane membranes on plates with minimal medium containing the indicated nitrogen source. The cellophane with the fungal colony was removed, plates were incubated for an additional day, and presence (+) or absence (−) of fungal mycelium on the underlying medium was scored.