Figure 1

From: Cooperation and cheating in Pseudomonas aeruginosa: the roles of the las, rhl and pqs quorum-sensing systems

Figure 1

Emergence of QS-deficient isolates during in vitro evolution of the P. aeruginosa wild type. Deficiencies in skim-milk proteolysis (solid squares), growth on adenosine (solid triangles), rhamnolipid production (solid circles) and AQ production (solid diamonds) are shown. CFU ml−1 (open squares) are indicated on the right y axis. Skim-milk proteolysis and growth on adenosine are las dependent, rhamnolipid production is rhl dependent and AQ production is pqs dependent. The discrepancy in the number of adenosine and protease-negative isolates is due to the fact that some lasR mutants regain the ability to degrade skim milk (Sandoz et al., 2007). Data are averages of two independent in vitro evolution experiments.