Table 2.

Effect of a cepR mutation on siderophore, protease, and lipase productiona

StrainGenotypeSupernatant CAS activity (A630/A600)CAS agar zone diam (mm)Ornibactinb (μg/ml/ A600)Salicylic acid (μg/ml/ A600)Protease zone radius (mm)Lipase activity (U/ml/ A600)
K56-2Wild type1.74 ± 0.309.5 ± 0.549.8 ± 4.20.54 ± 0.105.67 ± 0.290.53 ± 0.02
K56-R2c cepR::Tn5 2.47 ± 0.20c 13.7 ± 0.3c 83.1 ± 1.1c 0.49 ± 0.040c 0.29 ± 0.05c
  • a All values are means ± standard deviations of triplicate experiments unless indicated otherwise.

  • b Mean ± standard deviation of duplicate experiments.

  • c Significantly different from parent K56-2 in unpaired t test (P < 0.05).