Pleiotropic Effects of GacA on Pseudomonas fluorescens Pf0-1 In Vitro and in Soil.

Pseudomonas species can exhibit phenotypic variation resulting from gacS or gacA mutation. P. fluorescens Pf0-1 is a gacA mutant and exhibits pleiotropic changes following the introduction of a functional allele. GacA enhances biofilm development while reducing dissemination in soil, suggesting that alternative Gac phenotypes enable Pseudomonas sp. to exploit varied environments. [ABSTRACT FROM AUTHOR]