Internal Movement of Erwinia amylovora Through Symptomless Apple Scion Tissues into the Rootstock
نویسندگان
چکیده
منابع مشابه
survey of internal infection of erwinia amylovora in symptomless mother apple trees
the internal infections of erwinia amylovora have important roles for disease beginning in the spring and dissemination of inoculum through infected vegetative planting material and nursery trees. in this study, we survey internal infection of erwinia amylovora in symptomless commercial apple cultivars in karaj and damavand cities, using optimized diagnostic methods such as plating on semi sele...
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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...
متن کاملBacteriophages of Erwinia amylovora.
Fifty bacteriophage isolates of Erwinia amylovora, the causal agent of fire blight, were collected from sites in and around the Niagara region of southern Ontario and the Royal Botanical Gardens, Hamilton, Ontario. Forty-two phages survived the isolation, purification, and storage processes. The majority of the phages in the collection were isolated from the soil surrounding trees exhibiting fi...
متن کاملApple endophytic microbiota of different rootstock/scion combinations suggests a genotype-specific influence
BACKGROUND High-throughput amplicon sequencing spanning conserved portions of microbial genomes (16s rRNA and ITS) was used in the present study to describe the endophytic microbiota associated with three apple varieties, "Royal Gala," "Golden Delicious," and "Honey Crisp," and two rootstocks, M.9 and M.M.111. The objectives were to (1) determine if the microbiota differs in different rootstock...
متن کاملAntibiosis activity of Pantoea agglomerans biocontrol strain E325 against Erwinia amylovora on apple flower stigmas.
Pantoea agglomerans E325, the active ingredient in a commercial product for fire blight control, was previously shown in vitro to produce a unique alkaline- and phosphate-sensitive antibiotic specific to Erwinia amylovora. Antibiosis was evaluated as a mode of antagonism on flower stigmas using two antibiosis-deficient mutants. On King's medium B, mutants E325ad1 and E325ad2 have stable smooth-...
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ژورنال
عنوان ژورنال: Plant Disease
سال: 1998
ISSN: 0191-2917,1943-7692
DOI: 10.1094/pdis.1998.82.6.646