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Evolution of Thermal Plasticity in <i>Hymenoscyphus fraxineus</i> During Ash Dieback Expansion in Europe

hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorBÉCANS, Clémence
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorROBIN, Cécile
hal.structure.identifierNorthwest German Forest Research Institute
dc.contributor.authorBUDDE, Katharina
hal.structure.identifierDepartment of Agriculture, Food, Environment and Forestry [DAGRI]
dc.contributor.authorGHELARDINI, Luisa
hal.structure.identifierSwiss Federal Institute for Forest, Snow and Landscape Research WSL
dc.contributor.authorGROSS, Andrin
hal.structure.identifierInstitute of Botany of Nature Research Centre
dc.contributor.authorLYGIS, Vaidotas
hal.structure.identifierIT University of Copenhagen [ITU]
dc.contributor.authorNIELSEN, Lene
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorSAINT-JEAN, Gilles
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorSOULARUE, Jean‐paul
dc.date.accessioned2025-07-22T02:01:55Z
dc.date.available2025-07-22T02:01:55Z
dc.date.issued2025-06
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/207371
dc.description.abstractEn<div><p>The plasticity of adaptive traits may be critical for population persistence in heterogeneous environments. However, its evolution is rarely investigated in forest pathogens, potentially limiting the accuracy of epidemic risk predictions. Ash dieback is an emblematic example of a forest epidemic caused by an invasive fungal pathogen-Hymenoscyphus fraxineus, which has likely been introduced to Eastern Europe from East Asia. We investigated the plasticity and thermal niche evolution of H. fraxineus during its spread across Europe. We characterized the reaction norms of in vitro mycelial growth and viability of H. fraxineus isolates from five European populations sampled along a latitudinal gradient spanning from Lithuania to Italy. While all populations responded uniformly to temperature decrease, their responses to temperature increase diverged markedly. The growth of H. fraxineus isolates from the northernmost population (Lithuania) was most negatively affected by high temperatures, whereas the southernmost isolates (Italy) showed optimal growth at a higher temperature compared to the other populations. Additionally, the viability of Lithuanian isolates was significantly reduced by higher temperatures compared to that of the other populations. These findings suggest that both growth plasticity and thermal niche have evolved during the pathogen's expansion in Europe, with potentially important implications for predicting and managing future epidemic risks. We further discuss how evolutionary processes may have shaped these phenotypic differences.</p><p>This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.</p></div>
dc.language.isoen
dc.publisherWiley Open Access
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.subject.enash dieback
dc.subject.enChalara fraxinea
dc.subject.enHymenoscyphus fraxineus
dc.subject.enHymenoscyphus pseudoalbidus
dc.subject.eninvasive fungal pathogen
dc.subject.enmicrobial evolution
dc.subject.enplasticity evolution
dc.subject.enthermal plasticity
dc.title.enEvolution of Thermal Plasticity in <i>Hymenoscyphus fraxineus</i> During Ash Dieback Expansion in Europe
dc.typeArticle de revue
dc.identifier.doi10.1002/ece3.71513
dc.subject.halSciences de l'environnement
bordeaux.journalEcology and Evolution
bordeaux.volume15
bordeaux.hal.laboratoriesBioGeCo (Biodiversité Gènes & Communautés) - UMR 1202*
bordeaux.issue6
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-05172513
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-05172513v1
bordeaux.COinSctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.jtitle=Ecology%20and%20Evolution&amp;rft.date=2025-06&amp;rft.volume=15&amp;rft.issue=6&amp;rft.au=B%C3%89CANS,%20Cl%C3%A9mence&amp;ROBIN,%20C%C3%A9cile&amp;BUDDE,%20Katharina&amp;GHELARDINI,%20Luisa&amp;GROSS,%20Andrin&amp;rft.genre=article


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