All the G- isolates assigned to the BOX-PCR group B produced
quorum-sensing signals activating both the short and
long chain N-acyl homoserine lactone (AHL) reporters
1), whereas 2 isolates gave a positive result only in the long
chain AHL bioassay (Table 1), i.e., CT1 (Pantoea sp.) and
CT33 (Sphingomonas sp.). Co-culture of each of the 39 isolates
and of P. aeruginosa PAO1 (producer of C4-AHL and
C12-AHL) did not reveal interference with P. aeruginosa
AHL-dependent induction of violacein synthesis in the C. violaceum
bioassay