Fig. 1From: Systematic identification of endogenous strong constitutive promoters from the diazotrophic rhizosphere bacterium Pseudomonas stutzeri DSM4166 to improve its nitrogenase activityLuciferase assay of constitutive promoters in P. stutzeri DSM4166 in the LB medium under the aerobic condition. (A) Schematic of the plasmid containing different promoters. pBBR1: replicon; kan: kanamycin resistance gene; firefly: firefly luciferase reporter gene. (B) Luciferase activity of plasmids containing different promoters in DSM4166. Vector: the promoterless plasmid. Pgenta: the promoter of the gentamicin resistance gene. PnifA: the promoter of the nitrogen fixation pathway specific positive regulator gene nifA. Error bars indicate the standard deviations of three replicates (n = 3). The P-value cutoff for all the plots is 0.05. * P < 0.05, ** P < 0.01, and *** P < 0.001. One-way ANOVA test with Tukey Pairwise comparisons was used to compute statistical significanceBack to article page