Fig 5.

(A) Response of asnO::Tn5luxAB and ngg::Tn5luxAB during growth of strains S. meliloti 1021, Sce10, and Sce11 in liquid PMM. Error bars for OD measurements represent standard errors of the means (SEM) determined from three independent cultures (n = 3). RLU error bars represent the SEM of the results of three independent cultures performed in duplicate (n = 6). Black squares, growth of S. meliloti 1021 expressed in optical density (OD₅₉₅) units; black circles, growth of Sce11 expressed in OD units; black triangles, growth of Sce10 expressed in OD units; open circles, luciferase activity of ngg::Tn5luxAB expressed in units of RLU/min/ml/OD; open triangles, luciferase activity of asnO::Tn5luxAB expressed in units of RLU/min/ml/OD.