Articles
INVESTIGATING THE VIRULENCE OF ERWINIA AMYLOVORA ISOLATES BY USING APPLE TISSUE CULTURE AND PEAR FRUIT
Article number
896_29
Pages
223 – 230
Language
English
Abstract
The objective of this study was to investigate whether there is a relationship between the virulence of different isolates of Erwinia amylovora, the bacterium causing fire blight, and the host plant.
Seventeen wild-type isolates from apple and seven isolates from pear and other hosts were used.
Testing virulence of the isolates and susceptibility degree of the apple and pear cultivars was determined using micro- propagated plantlets and unripe fruits for inoculation tests.
Based on our result several isolates that have been analyzed elicited a higher severity of disease symptoms than others.
On the apple cultivar Jonagold an E. amylovora apple isolate (Ea 1) was more virulent than the other isolates tested.
Pear isolate (Ea 10) was nearly as virulent as the apple isolate (Ea 1), but Cotoneaster and Pyracantha isolates caused less severe disease symptoms.
Virulence of the tested isolates also significantly differed when tested on pear fruits.
Differences were found when examining the susceptibility of traditional pear cultivars.
The apple cultivar Jonagold and the pear cultivars Olivier de Serres and Doyenne dHiver were most susceptible.
As a conclusion, these results can be useful for classification of E. amylovora isolates and resistance breeding programs in the future.
Seventeen wild-type isolates from apple and seven isolates from pear and other hosts were used.
Testing virulence of the isolates and susceptibility degree of the apple and pear cultivars was determined using micro- propagated plantlets and unripe fruits for inoculation tests.
Based on our result several isolates that have been analyzed elicited a higher severity of disease symptoms than others.
On the apple cultivar Jonagold an E. amylovora apple isolate (Ea 1) was more virulent than the other isolates tested.
Pear isolate (Ea 10) was nearly as virulent as the apple isolate (Ea 1), but Cotoneaster and Pyracantha isolates caused less severe disease symptoms.
Virulence of the tested isolates also significantly differed when tested on pear fruits.
Differences were found when examining the susceptibility of traditional pear cultivars.
The apple cultivar Jonagold and the pear cultivars Olivier de Serres and Doyenne dHiver were most susceptible.
As a conclusion, these results can be useful for classification of E. amylovora isolates and resistance breeding programs in the future.
Publication
Authors
M. Hevesi, A. Végh, M. Tóth, E. Benczur, L. Palkovics
Keywords
micro-propagation, in vitro, fire blight, Erwinia amylovora, disease rating
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