Evidence for Two Virulence Determinants in the Fireblight Pathogen Erwinia amylovora
نویسندگان
چکیده
منابع مشابه
Identification of Erwinia amylovora, the Fireblight Pathogen, by Colony Hybridization with DNA from Plasmid pEA29.
All strains of Erwinia amylovora characterized carry a medium-size plasmid of 29 kilobases (pEA29). We mapped this plasmid with various restriction enzymes, cloned the whole DNA into an Escherichia coli plasmid, and subcloned restriction fragments. These DNA species were used for identification of E. amylovora after handling of strains in the laboratory and also in field isolates. About 70 stra...
متن کاملVirulence Factors of Erwinia amylovora: A Review
Erwinia amylovora, a Gram negative bacteria of the Enterobacteriaceae family, is the causal agent of fire blight, a devastating plant disease affecting a wide range of host species within Rosaceae and a major global threat to commercial apple and pear production. Among the limited number of control options currently available, prophylactic application of antibiotics during the bloom period appe...
متن کاملAutoinduction in Erwinia amylovora: evidence of an acyl-homoserine lactone signal in the fire blight pathogen.
Erwinia amylovora causes fire blight disease of apple, pear, and other members of the Rosaceae. Here we present the first evidence for autoinduction in E. amylovora and a role for an N-acyl-homoserine lactone (AHL)-type signal. Two major plant virulence traits, production of extracellular polysaccharides (amylovoran and levan) and tolerance to free oxygen radicals, were controlled in a bacteria...
متن کاملThe outer membrane protein TolC is required for phytoalexin resistance and virulence of the fire blight pathogen Erwinia amylovora
Erwinia amylovora causes fire blight on several plant species such as apple and pear, which produce diverse phytoalexins as defence mechanisms. An evolutionary successful pathogen thus must develop resistance mechanisms towards these toxic compounds. The E. amylovora outer membrane protein, TolC, might mediate phytoalexin resistance through its interaction with the multidrug efflux pump, AcrAB....
متن کاملExtracellular Polysaccharide of Erwinia amylovora: a Correlation with Virulence.
The extracellular polysaccharides produced as slime or capsule layers by bacterial pathogens of animals and plants have been often implicated as factors essential to pathogenesis. In the present study, virulence of the plant pathogen Erwinia amylovora was correlated with the ability to produce extracellular polysaccharide (EPS). EPS production by a series of field isolates and bacterio-phage-re...
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ژورنال
عنوان ژورنال: Microbiology
سال: 1980
ISSN: 1350-0872,1465-2080
DOI: 10.1099/00221287-116-2-351