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. 2019 Sep 23;9(10):522. doi: 10.3390/biom9100522

Figure 6.

Figure 6

IAA stimulates the activity of the nitrogen-fixation regulator gene nifA. E. meliloti cells grown in nitrogen-free cultures were treated with IAA and novobiocin at final concentrations of 1 and 1.5 mM, respectively. The expression of the nifA promoter-lacZ fusion gene (A and C) and bacterial growth (B and D) were measured over time. The asterisks (*) indicate significant differences (p < 0.05, one-way ANOVA with Tukey’s post-hoc test) between the control and cells treated with IAA and novobiocin (Nov).