Characterization ofBacillusstrains from apple and pear trees in South Africa antagonistic toErwinia amylovora
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چکیده
منابع مشابه
Erwinia tasmaniensis sp. nov., a non-phytopathogenic bacterium from apple and pear trees.
Bacteria were isolated from flowers and bark of apple and pear trees at three places in Australia. In Victoria, Tasmania and Queensland, strains with white colonies on nutrient agar were screened for dome-shaped colony morphology on agar with sucrose and were found to be closely related by several criteria. The isolates were not pathogenic on apples or pears. They were characterized by a polyph...
متن کاملFire Blight Disease Caused by Erwinia amylovora on Rosaceae Plants in Kyrgyzstan and Biological Agents to Control This Disease
Erwinia amylovora species were isolated from the blossoms, exudates, infected fruits, leaves and bent branches of diseased apple, pear and hawthorn trees, selected in the Chy, Osh and Jalal Abad regions. Biochemical and pathogenicity tests, alongside PCR analyses, were conducted to identify the local isolates of Erwinia amylovora. The alternative antagonistic microorganisms which combat bacteri...
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Two methods were developed for the generation of cisgenic apples. Both have been successfully applied producing trees. The first method avoids the use of any foreign selectable marker genes; only the gene-of-interest is integrated between the T-DNA border sequences. The second method makes use of recombinase-based marker excision. For the first method we used the MdMYB10 gene from a red-fleshed...
متن کاملErwinia amylovora Expresses Fast and Simultaneously hrp/dsp Virulence Genes during Flower Infection on Apple Trees
BACKGROUND Pathogen entry through host blossoms is the predominant infection pathway of the gram-negative bacterium Erwinia amylovora leading to manifestation of the disease fire blight. Like in other economically important plant pathogens, E. amylovora pathogenicity depends on a type III secretion system encoded by hrp genes. However, timing and transcriptional order of hrp gene expression dur...
متن کاملIsolation of a Factor from Apple that Agglutinates Erwinia amylovora.
Extracts prepared from apple seeds contain a factor (AF) capable of agglutinating cells of Erwinia amylovora. In drop agglutination tests, AF is more active in agglutinating an avirulent, acapsular strain of E. amylovora than a virulent, capsular strain. AF precipitates in agar plates with a receptor derived from boiled cells of avirulent acapsular strain and, therefore, can be located during f...
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ژورنال
عنوان ژورنال: FEMS Microbiology Letters
سال: 2002
ISSN: 0378-1097,1574-6968
DOI: 10.1111/j.1574-6968.2002.tb11232.x