Fig. 7

Colony morphology, alginate biosynthesis related genes expression and biofilm formation of P. aeruginosa JNQH-PA57. a Colony morphology of four P. aeruginosa strains cultured at 25 °C on LB agar plates supplemented with Coomassie blue and Congo Red. The white arrow points to the exopolysaccharide produced by JNQH-PA57. b Expression of algD and algU genes in JNQH-PA57 and PAO1 measured by qRT-PCR. Each experiment was done in triplicate. c Biofilm formation of four P. aeruginosa strains via crystal violet staining. d Comparison of the growth of P. aeruginosa JNQH-PA57 and three other P. aeruginosa reference strains on LB. Representative growth curves of JNQH-PA57, PAO1, PA14 and ATCC 27853 were measured via microplate method