Table 1 Pseudomonas aeruginosa strains used in this study

WT

PA14 P _rhlAB ::gfp

The wild-type background with a P _rhlAB ::gfp reporter fusion

[13, 25]

NEG

PA14 ΔrhlA/P _rhlAB ::gfp

Same as WT but with rhamnolipid synthesis gene rhlA deleted.

This study

QSN

PA14 rhlI^-/P _rhlAB ::gfp

Same as WT but with a transposon knockout of rhlI gene for autoinducer synthase.

This study

IND

PA14 ΔrhlA/P_BAD::rhlAB

Strain with rhamnolipid synthesis genes rhlAB regulated by an L-arabinose inducible promoter.

[13]