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Effect of LGEO on Chromobacterium violaceum production of violacein on LB agar plates. (A) The diameter of colorless halos on lawns of C. violaceum surrounding the treatment disk was measured in millimeters (means* ± SEM; n = 8/treatment). (B) Illustrates the colorless halo on the plates. * least square means. a – c Treatments with different superscripts are significantly different (P≤ 0.05).
