Fire blight, which is a major constraint to pome fruit production in many areas of the world, is most commonly initiated by epiphytic populations of Erwinia amylovora that develop on blossoms (1,26). Under relatively dry climatic conditions, bacteria colonize flower stigmas, and subsequent rain or heavy dew facilitates movement to the floral cup (hypanthium), where infection generally occurs (2...

S/AgI microstructures were produced by solvothermal DMSO-mediated synthesis using two methods of sulfur precipitation: at room temperature (method 1) and water 2). The samples obtained with different percentages AgI: 10, 30 50 %. Microstructures investigated help XRD, Raman spectroscopy SEM/EDS (elemental mapping). XRD confirmed the presence AgI. EDS elemental mapping revealed that composed lar...

Purothionins are basic polypeptides with antimicrobial properties that are present in the endosperm of wheat and other cereal species. Susceptibility to wheat purothionins among phytopathogenic bacteria of the genera Pseudomonas, Xanthomonas, Agrobacterium, Erwinia, and Corynebacterium has been investigated. Sensitive strains have been found in all of these genera except Agrobacterium (the only...

Virulent E(9) and avirulent E(8) strains of Erwinia amylovora were shown by means of light, transmission, and scanning microscopy to be, respectively, encapsulated and unencapsulated. Difficulty was encountered in stabilizing the fibrillar-appearing capsular extracellular polysaccharide. We suggest that the ephemeral nature of extracellular polysaccharide is due to the collapse of its extended ...

This paper describes the results of marker-mediated screening apple varieties for QTL FBF7 fire blight resistance. We detected at least one marker out three in 12 (85.7%) and two markers 5 (35.7%). The target fragments studied Antonovka obiknovennaya Galarina are missing. Indicating presence (GE-8019, AE10-375 CH-F7-Fb1) were identified Bylina, Rozhdestvenskoe, Uspenskoe Charodeyka varieties, w...

RpoS (sigma-S or sigma-38) controls a large array of genes that are expressed during stationary phase and under various stress conditions in Escherichia coli and other bacteria. We document here that plant pathogenic and epiphytic Erwinia species, such as E. amylovora; E. carotovora subsp. atroseptica, betavasculorum, and carotovora; E. chrysanthemi; E. herbicola; E. rhapontici; and E. stewarti...

The present study was conducted to detect the occurrence, serotype, genotype, phylogenetic relationship and antimicrobial resistance pattern of STEC from healthy goats of West Bengal, India. From the 125 faecal samples collected from healthy goats, 245 isolates were identified as Escherichia coli. The E. coli harbouring any gene for Shiga toxins (stx1/stx2) was detected in 36 (14.7%) of the 245...

background : enteroaggregative e. coli (eaec) is increasingly recognized as a cause of often persistent diarrhea in children and adults in both developing and developed countries. the aim of the present study was to investigate the presence and the frequency of eaec as etiologic agent of diarrhea in shiraz. methods : a total of 715 stool samples were collected from patients with diarrhea in shi...