Fig 4. Biofilm formation is only slightly dependent on NtrC.

Biofilm production was assessed for the wild type, ntrC mutant and complemented strain in 96-well plates. The columns represent the mean biofilm index generated from independent biological triplicate cultures of each strain. The error bars indicate the standard deviation. The increased biofilm formation in the complemented mutant compared to the wild type was statistically significant (*** p<0.0001). However, the slight reduction in the mutant was not statistically significant (ns).