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Phytophthora acerina sp nov., a new species causing bleeding cankers and dieback of Acer pseudoplatanus trees in planted forests in northern Italy

2014-08Journal article Open access
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dc.contributor.authorGinetti, Beatrice
dc.contributor.authorMoricca, S.
dc.contributor.authorSquires, J. N.
dc.contributor.authorCooke, D. E. L.
dc.contributor.authorRagazzi, A.
dc.contributor.authorJung, T.
dc.date.accessioned2018-12-07T14:52:41Z
dc.date.available2018-12-07T14:52:41Z
dc.date.issued2014-08
dc.description.abstractA severe dieback of Acer pseudoplatanus trees was noticed in planted forest stands in northern Italy in 2010. Affected trees showed collar rot and aerial bleeding cankers along the stems, leading to crown dieback and eventually death. An unknown Phytophthora species was consistently isolated from necrotic bark and xylem tissue and from rhizosphere soil. Based on its unique combination of morphological and physiological characters and phylogenetic analysis, this new taxon is here described as Phytophthora acerina sp. nov. Phylogenetic analysis of ITS, cox1 and beta-tubulin gene regions demonstrated that P. acerina is unique and forms a separate cluster within the 'P. citricola complex', closely related to P. plurivora. Phytophthora acerina is homothallic with smooth-walled oogonia, thick-walled, mostly aplerotic oospores with a high abortion rate, paragynous antheridia, and persistent, morphologically variable semipapillate sporangia. Four to 5-week-old cultures produced globose to subglobose, appressoria-like and coralloid hyphal swellings and characteristic stromata-like hyphal aggregations. Optimum and maximum temperatures for growth are 25 degrees C and 32 degrees C, respectively. Genetic uniformity of all 15 studied isolates and the apparent absence of this species in the extensive surveys of nurseries, forests and seminatural ecosystems conducted in the previous two decades across Europe indicate a recent clonal introduction to northern Italy. Under-bark inoculation tests demonstrated high aggressiveness of P. acerina to A. pseudoplatanus indicating that this pathogen might be a serious risk to maple plantations and forests in Europe.
dc.description.sponsorshipItalia Nostra Onlus - Centro della Forestazione Urbana (CFU); Scottish Government
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1111/ppa.12153
dc.identifier.issn0032-0862
dc.identifier.issn1365-3059
dc.identifier.urihttp://hdl.handle.net/10400.1/11159
dc.language.isoeng
dc.peerreviewedyes
dc.publisherWiley-Blackwell
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectNatural ecosystems
dc.subjectWestern-Australia
dc.subjectOak stands
dc.subjectCitricola
dc.subjectSequences
dc.subjectMultiple
dc.subjectEurope
dc.subjectIdentification
dc.subjectPhylogeny
dc.subjectDecline
dc.titlePhytophthora acerina sp nov., a new species causing bleeding cankers and dieback of Acer pseudoplatanus trees in planted forests in northern Italy
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage876
oaire.citation.issue4
oaire.citation.startPage858
oaire.citation.titlePlant Pathology
oaire.citation.volume63
person.familyNameGinetti
person.familyNamemoricca
person.familyNameCooke
person.familyNameJung
person.givenNameBeatrice
person.givenNamesalvatore
person.givenNameDavid
person.givenNameThomas
person.identifier457212
person.identifier.ciencia-id6A14-0727-EDCD
person.identifier.orcid0000-0002-9251-0539
person.identifier.orcid0000-0003-3097-559X
person.identifier.orcid0000-0002-9154-7954
person.identifier.orcid0000-0003-2034-0718
person.identifier.ridF-1665-2013
person.identifier.scopus-author-id55440824500
person.identifier.scopus-author-id7003727908
person.identifier.scopus-author-id7201389242
rcaap.rightsopenAccess
rcaap.typearticle
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relation.isAuthorOfPublication2b99ea4b-9c3a-49cd-aa88-d570ab3da536
relation.isAuthorOfPublication453b5e68-4fa6-441f-84b4-877eae3529a2
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relation.isAuthorOfPublication.latestForDiscovery2b99ea4b-9c3a-49cd-aa88-d570ab3da536

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