TABLE 3.

Promoter activities of xopA, xopD, and hpaF in X. campestris pv. vesicatoria strains 85-10 and 85*a

Reporter construct (gene)Activity (GUS units) ± SDb in strain:Fold induction (compared to 85-10)
85-1085*c
pICxopA (xopA)1.2 ± 0.224 ± 320
pICxopD (xopD)0.24 ± 0.061.9 ± 0.48
pXV4::462 (hpaF)0.06 ± 0.022.4 ± 0.540
  • a Bacteria were grown in NYG medium.

  • b One unit corresponds to 1 nmol of 4-methylumbelliferone released per min per bacterium.

  • c Carries the hrpG* mutation, which leads to constitutive hrp gene expression (45).