title: Inactivation of the regulatory gene algU or gacA can affect the ability of biocontrol Pseudomonas fluorescens CHA0 to persist as culturable cells in nonsterile soil.
abstract: Rifampin-resistant Pseudomonas fluorescens CHA0-Rif and mutants in which the regulatory gene algU (encoding sigma factor sigma(E)) or gacA (encoding a global regulator of secondary metabolism) was inactivated were compared for persistence in three nonsterile soils. Functional algU and (particularly) gacA were needed for CHA0-Rif to maintain cell culturability in soil.
authors.affiliation: Phytopathology Group, Institute of Plant Science, Swiss Federal Institute of Technology (ETH), CH-8092 Zürich, Switzerland.
authors.forename: Fabio
authors.initials: F
authors.lastname: Mascher
authors.forename: Yvan
authors.initials: Y
authors.lastname: Moënne-Loccoz
authors.forename: Ursula
authors.initials: U
authors.lastname: Schnider-Keel
authors.forename: Christoph
authors.initials: C
authors.lastname: Keel
authors.forename: Dieter
authors.initials: D
authors.lastname: Haas
authors.forename: Geneviève
authors.initials: G
authors.lastname: Défago
mesh_terms: D001426:Bacterial Proteins / Q000235:genetics*; D015169:Colony Count, Microbial; D003470:Culture Media; D005809:Genes, Regulator / Q000235:genetics*; D009154:Mutation; D010572:Pest Control, Biological; D011551:Pseudomonas fluorescens / Q000235:genetics / Q000254:growth & development*; D012808:Sigma Factor / Q000235:genetics*; D012988:Soil Microbiology
chemical_list: C079619:AlgU protein, Pseudomonas aeruginosa; D001426:Bacterial Proteins; D003470:Culture Media; C091100:GacA protein, Bacteria; D012808:Sigma Factor