FIG. 2.

(A) Representative growth curves of wild-type A. tumefaciens (dotted lines) and a gmas::gm mutant (solid lines) grown with ammonium (squares) and MMA (diamonds) as the sole nitrogen source or with no added nitrogen (controls are indicated as circles). The means and standard deviations of the results of three replicate experiments are shown. Note that the y axis is not presented as a logarithmic scale. (B) Representative growth curves of mgdC::gm, mgsC::gm, and mgsC_gmas::gm mutants of A. tumefaciens grown with ammonium (filled, empty, and shaded squares, respectively) and MMA (filled, empty, and shaded diamonds, respectively) as the sole nitrogen source or with no added nitrogen (controls are indicated as filled, empty, and shaded circles, respectively). The means and standard deviations of the results of three replicate experiments are shown. Note that the y axis is not presented as a logarithmic scale.