Evidence for signaling between the phytopathogenic fungus Pythium ultimum and Pseudomonas fluorescens F113: P. ultimum represses the expression of genes in P. fluorescens F113, resulting in altered ecological fitness
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چکیده
منابع مشابه
The type III secretion system of biocontrol Pseudomonas fluorescens KD targets the phytopathogenic Chromista Pythium ultimum and promotes cucumber protection.
The type III secretion system (TTSS) is used by Proteobacteria for pathogenic or symbiotic interaction with plant and animal hosts. Recently, TTSS genes thought to originate from the phytopathogen Pseudomonas syringae were evidenced in Pseudomonas fluorescens KD, which protects cucumber from the oomycete Pythium ultimum (kingdom Chromista/Stramenopila). However, it is not known whether the TTSS...
متن کاملThree independent signalling pathways repress motility in Pseudomonas fluorescens F113
Motility is one of the most important traits for rhizosphere colonization by pseudomonads. Despite this importance, motility is severely repressed in the rhizosphere-colonizing strain Pseudomonas fluorescens F113. This bacterium is unable to swarm under laboratory conditions and produce relatively small swimming haloes. However, phenotypic variants with the ability to swarm and producing swimmi...
متن کاملA regulatory RNA (PrrB RNA) modulates expression of secondary metabolite genes in Pseudomonas fluorescens F113.
The GacS-GacA two-component signal transduction system, which is highly conserved in gram-negative bacteria, is required for the production of exoenzymes and secondary metabolites in Pseudomonas spp. Screening of a Pseudomonas fluorescens F113 gene bank led to the isolation of a previously undefined locus which could restore secondary metabolite production to both gacS and gacA mutants of F113....
متن کاملEffects of Pseudomonas fluorescens F113 on ecological functions in the rhizosphere of pea is dependent on pH
The aim of this microcosm study was to determine influence of the antibiotic 2,4 diacetylphloroglucinol (DAPG) on the effect of wild type and functionally modified Pseudomonas fluorescens F113 strains in a sandy loam soil of pH 5.4 planted with pea (Pisum sativum var Montana). The functional modification of strain F113 was a repressed production of DAPG, useful in plant disease control, creatin...
متن کاملAnalysis of Pseudomonas fluorescens F113 genes implicated in flagellar filament synthesis and their role in competitive root colonization.
The ability of plant-associated micro-organisms to colonize and compete in the rhizosphere is specially relevant for the biotechnological application of micro-organisms as inoculants. Pseudomonads are one of the best root colonizers and they are widely used in plant-pathogen biocontrol and in soil bioremediation. This study analyses the motility mechanism of the well-known biocontrol strain Pse...
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ژورنال
عنوان ژورنال: Applied and Environmental Microbiology
سال: 1997
ISSN: 0099-2240,1098-5336
DOI: 10.1128/aem.63.11.4261-4266.1997