A role for exopolysaccharides in the protection of microorganisms from desiccation.

摘要: Mucoid strains of Escherichia coli, Acinetobacter calcoaceticus, and Erwinia stewartii were significantly more resistant to desiccation than corresponding isogenic nonmucoid mutants (survival rates up 35% in mucoid between 0.7 5% variants), even colonies containing both cell types. Desiccation was found bring about an induction β-galactosidase Lon- E. coli K-12 carrying transcriptional lac fusions the capsule biosynthetic (cps) regulon. This dependent on activators RcsA RcsB. Induction lower cells mutations membrane sensor protein RcsC. Images