Table 2.

Nitrogen utilization of P. aeruginosa strains

Nitrogen sourceNitrogen utilization of strain:
PA14PAK
Wild type (platesa)rpoN mutantWild type (platesa) rpoNmutant (platesa)
PlatesaLiquidb
Ammonia24+24
Arginine23+23
Glutamate22
Glutamine22+22
Histidine22
Nitrate22
  • a Measured as the number of days until the appearance of colonies. – indicates that only tiny colonies grew.

  • b Growth (+) or absence of growth (−) in liquid culture. Growth experiments were conducted twice with identical results