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 |
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| Authors: | Mascher Fabio Moënne-Loccoz Yvan Schnider-Keel Ursula Keel Christoph Haas Dieter Défago Geneviève |
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| Institution: | Phytopathology Group, Institute of Plant Science, Swiss Federal Institute of Technology (ETH), CH-8092 Zürich, Switzerland. |
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| 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. |
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