An Indigenous Virulent Strain of Erwinia amylovora Lacking the Ubiquitous Plasmid pEA29

An atypical strain of Erwinia amylovora was isolated near an outbreak of fire blight at a nursery in Spain in 1996. It was obtained from a Crataegus plant showing typical symptoms and was identified as E. amy-lovora by biochemical tests and enrichment-enzyme-linked immuno-sorbent assay, but not by p...

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Main Authors: Llop, Pablo, Donat, Victoria, Rodriguez, Margarita, Cabrefiga, Jordi, Ruz, Lidia, Palomares, Antonio E., Montesinos, Emilio, López, María M.
Format: article
Language:Inglés
Published: American Phytopathological Society (APS) 2022
Subjects:
Online Access:http://hdl.handle.net/20.500.11939/8058
https://apsjournals.apsnet.org/doi/epdfplus/10.1094/PHYTO-96-0900
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author Llop, Pablo
Donat, Victoria
Rodriguez, Margarita
Cabrefiga, Jordi
Ruz, Lidia
Palomares, Antonio E.
Montesinos, Emilio
López, María M.
author_browse Cabrefiga, Jordi
Donat, Victoria
Llop, Pablo
López, María M.
Montesinos, Emilio
Palomares, Antonio E.
Rodriguez, Margarita
Ruz, Lidia
author_facet Llop, Pablo
Donat, Victoria
Rodriguez, Margarita
Cabrefiga, Jordi
Ruz, Lidia
Palomares, Antonio E.
Montesinos, Emilio
López, María M.
author_sort Llop, Pablo
collection ReDivia
description An atypical strain of Erwinia amylovora was isolated near an outbreak of fire blight at a nursery in Spain in 1996. It was obtained from a Crataegus plant showing typical symptoms and was identified as E. amy-lovora by biochemical tests and enrichment-enzyme-linked immuno-sorbent assay, but not by polymerase chain reaction using primers based on the pEA29 sequence. Nevertheless, with primers from chromosomal regions, the isolate gave the expected amplification band. This strain carries one plasmid of ≈70 kb, with no homology with the 29-kb plasmid common to all pathogenic strains, or with a large plasmid present in some E. amylovora strains. Growth of the strain in minimal medium without thiamine was slower compared with cultures in the same medium with thiamine, a characteristic typical of strains cured of the 29-kb plasmid. Nevertheless, aggressiveness assays on pear, apple, and Pyracantha plants and in immature pear fruit showed that this strain exhibited a virulence level similar to other strains containing pEA29. To the best of our knowledge, this is the first report of the isolation from naturally infected plant material of a pathogenic strain of E. amylovora without pEA29, but with a plasmid of ≈70 kb not previously described.
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institution Instituto Valenciano de Investigaciones Agrarias (IVIA)
language Inglés
publishDate 2022
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publisherStr American Phytopathological Society (APS)
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spelling ReDivia80582025-04-25T14:48:42Z An Indigenous Virulent Strain of Erwinia amylovora Lacking the Ubiquitous Plasmid pEA29 Llop, Pablo Donat, Victoria Rodriguez, Margarita Cabrefiga, Jordi Ruz, Lidia Palomares, Antonio E. Montesinos, Emilio López, María M. Phenotypic characterization Strain comparison H20 Plant diseases U30 Research methods Erwinia amylovora Fire blight Virulence Plasmids An atypical strain of Erwinia amylovora was isolated near an outbreak of fire blight at a nursery in Spain in 1996. It was obtained from a Crataegus plant showing typical symptoms and was identified as E. amy-lovora by biochemical tests and enrichment-enzyme-linked immuno-sorbent assay, but not by polymerase chain reaction using primers based on the pEA29 sequence. Nevertheless, with primers from chromosomal regions, the isolate gave the expected amplification band. This strain carries one plasmid of ≈70 kb, with no homology with the 29-kb plasmid common to all pathogenic strains, or with a large plasmid present in some E. amylovora strains. Growth of the strain in minimal medium without thiamine was slower compared with cultures in the same medium with thiamine, a characteristic typical of strains cured of the 29-kb plasmid. Nevertheless, aggressiveness assays on pear, apple, and Pyracantha plants and in immature pear fruit showed that this strain exhibited a virulence level similar to other strains containing pEA29. To the best of our knowledge, this is the first report of the isolation from naturally infected plant material of a pathogenic strain of E. amylovora without pEA29, but with a plasmid of ≈70 kb not previously described. 2022-04-29T16:15:54Z 2022-04-29T16:15:54Z 2006 article publishedVersion Llop, P., Donat, V., Rodríguez, M., Cabrefiga, J., Ruz, L., Palomo, J. L. et al. (2006). An indigenous virulent strain of Erwinia amylovora lacking the ubiquitous plasmid pEA29. Phytopathology, 96(8), 900-907. 0031-949X 1943-7684 (e-ISSN) http://hdl.handle.net/20.500.11939/8058 10.1094/PHYTO-96-0900 https://apsjournals.apsnet.org/doi/epdfplus/10.1094/PHYTO-96-0900 en info:eu-repo/grantAgreement/CICYT//AGF98-0402-C03 info:eu-repo/grantAgreement/CICYT//AGL2001-2349-C03 This work was supported by Projects AGF98-0402-C03 and AGL2001-2349-C03 from the “Comisión Interministerial de Ciencia y Tecnología-CICYT” of Spain. Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ openAccess American Phytopathological Society (APS) electronico
spellingShingle Phenotypic characterization
Strain comparison
H20 Plant diseases
U30 Research methods
Erwinia amylovora
Fire blight
Virulence
Plasmids
Llop, Pablo
Donat, Victoria
Rodriguez, Margarita
Cabrefiga, Jordi
Ruz, Lidia
Palomares, Antonio E.
Montesinos, Emilio
López, María M.
An Indigenous Virulent Strain of Erwinia amylovora Lacking the Ubiquitous Plasmid pEA29
title An Indigenous Virulent Strain of Erwinia amylovora Lacking the Ubiquitous Plasmid pEA29
title_full An Indigenous Virulent Strain of Erwinia amylovora Lacking the Ubiquitous Plasmid pEA29
title_fullStr An Indigenous Virulent Strain of Erwinia amylovora Lacking the Ubiquitous Plasmid pEA29
title_full_unstemmed An Indigenous Virulent Strain of Erwinia amylovora Lacking the Ubiquitous Plasmid pEA29
title_short An Indigenous Virulent Strain of Erwinia amylovora Lacking the Ubiquitous Plasmid pEA29
title_sort indigenous virulent strain of erwinia amylovora lacking the ubiquitous plasmid pea29
topic Phenotypic characterization
Strain comparison
H20 Plant diseases
U30 Research methods
Erwinia amylovora
Fire blight
Virulence
Plasmids
url http://hdl.handle.net/20.500.11939/8058
https://apsjournals.apsnet.org/doi/epdfplus/10.1094/PHYTO-96-0900
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