FIG. 4.

Relationship between surfactant halo sizes produced by mutants of Pseudomonas syringae B728a and swarming distance (A) and syringafactin transcription estimated by GFP fluorescence of a PsyfA-gfp fusion (B). The wild type is included in both figures and is indicated as “WT.” Coordinates are taken directly from the measurements presented in Table 3. The lines drawn represent the following linear relationships: y = 2.275x − 0.8244 (R² = 0.68; P < 0.001) (A) and y = 115.27x + 282.6 (R² = 0.12; P < 0.3) (B).