The fire blight pathogen Erwinia amylovora can be considered a psychrotrophic bacterial species since it can grow at temperatures ranging from 4 °C to 37 °C, with an optimum of 28 °C. In many plant pathogens the expression of virulence determinants is restricted to a certain range of temperatures. In the case of E. amylovora, temperatures above 18 °C are required for blossom blight epidemics un...

Pantoea agglomerans (synonym: Erwinia herbicola) strain Eh318 produces through antibiosis a complex zone of inhibited growth in an overlay seeded with Erwinia amylovora, the causal agent of fire blight. This zone is caused by two antibiotics, named pantocin A and B. Using a genomic library of Eh318, two cosmids, pCPP702 and pCPP704, were identified that conferred on Escherichia coli the ability...

Recent examination of the relationships of the dry necrosis-inducing (necrogenic) erwinias using 16S rDNA sequences demonstrated that these bacteria comprise a polyphyletic group and, therefore, have been subdivided into three distinct genera, Erwinia, Brenneria and Pectobacterium, with the classical 'amylovora' group species now being distributed nearly evenly among the first two. To further a...

Endophytic fungi live in inter-cellular spaces of healthy plant tissues without causing any apparent symptoms diseases for the host plant. Some fungal endophytes help their hosts to survive under biotic and abiotic stresses. In this study, we collected mango leaves at Honghe plantations (Yunnan Province) winter. A total 34 different endophytic strains were isolated, phylogenetic placements esti...

A survey on 13 regions of Kazakhstan was carried out to identify foci fire blight, the extent its spread, range affected crops, and identification infection reserves. The disease mainly concentrated in main fruit growing zone.at south southeast Kazakhstan. Symptoms blight were characteristic two bacterial diseases: namely, necrosis, by Pseudomonas syringae Van. Hall. Erwinia amylovora (Burrill)...

As scored by several specified plating procedures, clinical and environmental strains of Yersinia enterocolitica, Yersinia pseudotuberculosis, and Klebsiella pneumoniae "Oxytocum" showed detectable, albeit generally weak, ability to digest polygalacturonic (pectic) acid. None of these bacterial strains had the vigorous and rapid pectolytic activity on these polygalacturonic acid-containing medi...

Clustered regularly interspaced short palindromic repeats (CRISPRs) comprise a family of short DNA repeat sequences that are separated by non repetitive spacer sequences and, in combination with a suite of Cas proteins, are thought to function as an adaptive immune system against invading DNA. The number of CRISPR arrays in a bacterial chromosome is variable, and the content of each array can d...

For the first time a sulfur solution in dimethyl sulfoxide (DMSO) with concentration of 1.592 g/L [1] was used to prepare nanoparticles (nanosulfur). Synthesis and stabilization colloidal particles carried out at 298K (25°C) by diluting DMSO water 10 1000 times. The stable sizes nanosulfur measured dynamic light scattering were ~ 100 nm. results confirmed both qualitatively quantitatively ...