TABLE 5.

Pyocyanin production by phnAB-region mutants carrying plasmids

Plasmidpqs genes on plasmidStraina
MPAO1MP703 (pqsC)MP704 (pqsD)MP605 (pqsE)MP710 (phnA)MP551 (pqsR/mvfR)
pUCP180.29 (0.05)0.02 (0.00)0.00 (0.00)0.00 (0.00)0.01 (0.00)0.01 (0.00)
pLG10pqsABCDE0.93 (0.10)0.78 (0.04)0.82 (0.06)0.80 (0.09)0.77 (0.05)0.00 (0.00)
pLG12pqsABCD0.13 (0.02)0.01 (0.00)0.00 (0.00)0.00 (0.00)0.01 (0.00)0.00 (0.00)
pLG14pqsABC0.17 (0.04)0.01 (0.00)0.01 (0.01)0.02 (0.01)0.020.01 (0.00)
pLG16pqsABC0.350.020.010.010.020.01
  • a The gene mutated in each strain is indicated. Pyocyanin was assayed as described previously (14), and its recovery is expressed in absorbance units. Standard errors of the mean are shown where multiple independent assays were performed.