TABLE 4.

Extracellular protease activities of X. campestris pv. campestris strains in rich medium and minimal medium

StrainExtracellular protease activity (A366)a in:
NYGMMX
8004 (wild type)0.286 ± 0.039a0.144 ± 0.029a
NK28270.264 ± 0.020a0.253 ± 0.010b
CNK28270.270 ± 0.031a0.165 ± 0.011a
8004*0.108 ± 0.035bNTb
8004* ΔhrpX 0.276 ± 0.010aNT
NK2827*0.276 ± 0.010aNT
  • a Data are the means ± standard deviations of triplicate measurements; different letters indicate significant differences (P = 0.05). The experiment was repeated twice, and similar results were obtained.

  • b NT, not tested.