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Phylogenetic and experimental evidence for host-specialized cryptic species in a biotrophic oomycete

hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
dc.contributor.authorROUXEL, Mélanie
hal.structure.identifierSanté de la vigne et qualité du vin [SVQV]
dc.contributor.authorMESTRE, Pere
hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
dc.contributor.authorCOMONT, Gwenaelle
hal.structure.identifierMichigan State University [East Lansing]
dc.contributor.authorLEHMAN, Brian L.
hal.structure.identifierMichigan State University [East Lansing]
dc.contributor.authorSCHILDER, Annemiek
hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
dc.contributor.authorDELMOTTE, François
dc.date.accessioned2024-04-08T12:31:19Z
dc.date.available2024-04-08T12:31:19Z
dc.date.issued2013
dc.identifier.issn0028-646X
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/197066
dc.description.abstractEnAssortative mating resulting from host plant specialization has been proposed to facilitate rapid ecological divergence in biotrophic plant pathogens. Downy mildews, a major group of biotrophic oomycetes, are prime candidates for testing speciation by host plant specialization. Here, we combined a phylogenetic and morphological approach with cross-pathogenicity tests to investigate host plant specialization and host range expansion in grapevine downy mildew. This destructive disease is caused by Plasmopara viticola, an oomycete endemic to North America on wild species and cultivated grapevines. Multiple genealogies and sporangia morphology provide evidence that P. viticola is a complex of four cryptic species, each associated with different host plants. Cross-inoculation experiments showed complete host plant specialization on Parthenocissus quinquefolia and on Vitis riparia, whereas cryptic species found on V. aestivalis, V. labrusca and V. vinifera were revealed to be less specific. We reconstructed the recent host range expansion of P. viticola from wild to cultivated grapevines, and showed that it was accompanied by an increase in aggressiveness of the pathogen. This case study on grapevine downy mildew illustrates how biotrophic plant pathogens can diversify by host plant specialization and emerge in agrosystems by shifting to cultivated hosts. These results might have important implications for viticulture, including breeding for resistance and disease management.
dc.language.isoen
dc.publisherWiley
dc.subject.endisease emergence
dc.subject.enevolution of aggressiveness in agro-ecosystem
dc.subject.enhost plant specialization
dc.subject.enhost shift
dc.subject.enplant–pathogen interaction
dc.subject.enPlasmopara viticola (the causal agent of grapevine downy mildew)
dc.subject.enquantitative adaptation to cultivar
dc.subject.enVitis vinifera and wild relatives
dc.title.enPhylogenetic and experimental evidence for host-specialized cryptic species in a biotrophic oomycete
dc.typeArticle de revue
dc.identifier.doi10.1111/nph.12016
dc.subject.halSciences du Vivant [q-bio]
dc.subject.halSciences du Vivant [q-bio]/Biologie végétale
bordeaux.journalNew Phytologist
bordeaux.page251-263
bordeaux.volume197
bordeaux.hal.laboratoriesSanté et Agro-Ecologie du Vignoble (SAVE) - UMR 1065*
bordeaux.issue1
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-02646761
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02646761v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=New%20Phytologist&rft.date=2013&rft.volume=197&rft.issue=1&rft.spage=251-263&rft.epage=251-263&rft.eissn=0028-646X&rft.issn=0028-646X&rft.au=ROUXEL,%20M%C3%A9lanie&MESTRE,%20Pere&COMONT,%20Gwenaelle&LEHMAN,%20Brian%20L.&SCHILDER,%20Annemiek&rft.genre=article


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