TABLE 4.
Effect of the loss of gacA or gacS on transcription of phzI and phzR
| Strain | phzI expression (GUS units)ab | phzR expression (Miller units)bc |
|---|---|---|
| 30-84Z (control) | 364 ± 45 A | NDd |
| 30-84Ice (control) | ND | 1,470 ± 214 D |
| 30-84.gacA | 24 ± 2 B | 1,753 ± 132 D |
| 30-84.W | 23 ± 2 B | 1,446 ± 76 D |
| 30-84.A2 | 23 ± 2 B | 1,789 ± 57 D |
| 30-84R | 163 ± 6 C | ND |
a
GUS activity produced from a plasmid-borne phzI::uidA transcriptional fusion (25).
b
Strains 30-84Z and 30-84Ice were included as controls for phzI and phzR expression, respectively. The values are means ± standard errors based on three replicates per treatment. Means followed by the same letter are not significantly different.
c
β-Galactosidase activity produced by a plasmid-borne phzR::lacZ transcriptional fusion (11).
d
ND, not determined.