Fig. 1.

Effect of mutation in gacS on morphology of stationary-phase cells of Pseudomonas chlororaphis O6. The wild type (O6), the gacS mutant (GacS-) and the complemented mutant (ComGacS-) were grown in LB to stationary-phase before imaging. Length and diameter for at least 100 cells for each strain were measured from the electron micrographs. The means and standard errors from two independent experiments are shown and the * indicates differences between the cell lengths as determined by Duncan’s multiple range test at P < 0.01.