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Powdery mildew decreases the radial growth of oak trees with cumulative and delayed effects over years

hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorBERT, Didier
hal.structure.identifierDirection Régionale Interdépartementale de l'Alimentation, de l'Agriculture et de la Forêt d'Île-de-France
dc.contributor.authorLASNIER, Jean-Baptiste
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorCAPDEVIELLE, Xavier
hal.structure.identifierU1018
dc.contributor.authorDUGRAVOT, Aline
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorDESPREZ-LOUSTAU, Marie Laure
dc.date.accessioned2022-10-12T13:05:40Z
dc.date.available2022-10-12T13:05:40Z
dc.date.issued2016
dc.identifier.issn1932-6203
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/157665
dc.description.abstractEnQuercus robur and Q. petraea are major European forest tree species. They have been affected by powdery mildew caused by Erysiphe alphitoides for more than a century. This fungus is a biotrophic foliar pathogen that diverts photosynthetate from the plant for its own nutrition. We used a dendrochronological approach to investigate the effects of different levels of infection severity on the radial growth of young oak trees. Oak infection was monitored at individual tree level, at two sites in southwestern France, over a five-year period (2001–2005). Mean infection severity was almost 75% (infected leaf area) at the end of the 2001 growing season, at both sites, but only about 40% in 2002, and 8%, 5% and 2% in 2003, 2004 and 2005, respectively. Infection levels varied considerably between trees and were positively related between 2001 and 2002. Increment cores were taken from each tree to assess annual ring widths and increases in basal area. Annual radial growth was standardised to take the effect of tree size into account. Annual standardised radial growth was significantly and negatively correlated with infection severity in the same year, for both 2001 and 2002, and at both sites. The decrease in growth reached 70–90% for highly infected trees. The earlywood width was poorly correlated with infection severity, but the proportion of latewood in tree rings was lower in highly infected trees (60%) than in less heavily infected trees (85%). Infection in 2001 and 2002 was found to have a cumulative effect on radial growth in these years, together with a delayed effect detectable in 2003. Thus, even non-lethal pathogens like powdery mildew can have a significant impact on tree functioning. This impact should be taken into account in growth and yield models, to improve predictions of forest net primary production.
dc.language.isoen
dc.publisherPublic Library of Science
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.title.enPowdery mildew decreases the radial growth of oak trees with cumulative and delayed effects over years
dc.typeArticle de revue
dc.identifier.doi10.1371/journal.pone.0155344
dc.subject.halSciences du Vivant [q-bio]
bordeaux.journalPLoS ONE
bordeaux.page19 p.
bordeaux.volume11
bordeaux.hal.laboratoriesBioGeCo (Biodiversité Gènes & Communautés) - UMR 1202*
bordeaux.issue5
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-02634265
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02634265v1
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