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Assessing frost damages using dynamic models in walnut trees: exposure rather than vulnerability controls frost risks

hal.structure.identifierEcophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
hal.structure.identifierLaboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant [PIAF]
hal.structure.identifierDepartment of Botany
dc.contributor.authorCHARRIER, Guillaume
hal.structure.identifierCentre d’Ecologie Fonctionnelle et Evolutive [CEFE]
dc.contributor.authorCHUINE, Isabelle
hal.structure.identifierLaboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant [PIAF]
dc.contributor.authorBONHOMME, Marc
hal.structure.identifierLaboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant [PIAF]
dc.contributor.authorAMEGLIO, Thierry
dc.date.issued2018
dc.identifier.issn0140-7791
dc.description.abstractEnFrost damages develop when exposure overtakes frost vulnerability. Frost risk assessment therefore needs dynamic simulation of frost hardiness using temperature and photoperiod in interaction with developmental stage. Two models, including or not the effect of photoperiod were calibrated using five years of frost hardiness monitoring (2007–2012), in two locations (low and high elevation) for three walnut genotypes with contrasted phenology and maximum hardiness (Juglans regia cv Franquette, Juglans regia x nigra ‘Early’ and ‘Late’). The Photothermal model predicted more accurate values for all genotypes (Efficiency = 0.879; RMSEP = 2.55 °C) than the Thermal model (Efficiency = 0.801; RMSEP = 3.24 °C). Predicted frost damages were strongly correlated to minimum temperature of the freezing events (ρ = −0.983) rather than actual frost hardiness (ρ = −0.515), or ratio of phenological stage completion (ρ = 0.336). Higher frost risks are consequently predicted during winter, at high elevation, whereas spring is only risky at low elevation in early genotypes exhibiting faster dehardening rate. However, early frost damages, although of lower value, may negatively affect fruit production the subsequent year (R2 = 0.381, P = 0.057). These results highlight the interacting pattern between frost exposure and vulnerability at different scales and the necessity of intra-organ studies to understand the time course of frost vulnerability in flower buds along the winter.
dc.language.isoen
dc.publisherWiley
dc.subject.enphenology
dc.subject.enphotoperiod
dc.subject.entemperature
dc.subject.enfrost hardiness
dc.subject.enabiotic stress
dc.subject.endormancy
dc.subject.ensimulation models
dc.subject.enblack walnut
dc.title.enAssessing frost damages using dynamic models in walnut trees: exposure rather than vulnerability controls frost risks
dc.typeArticle de revue
dc.identifier.doi10.1111/pce.12935
dc.subject.halSciences du Vivant [q-bio]/Ecologie, Environnement/Bioclimatologie
dc.subject.halSciences du Vivant [q-bio]/Biologie végétale/Botanique
bordeaux.journalPlant, Cell and Environment
bordeaux.page1008-1021
bordeaux.volume41
bordeaux.issue5
bordeaux.peerReviewedoui
hal.identifierhal-01608833
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01608833v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Plant,%20Cell%20and%20Environment&rft.date=2018&rft.volume=41&rft.issue=5&rft.spage=1008-1021&rft.epage=1008-1021&rft.eissn=0140-7791&rft.issn=0140-7791&rft.au=CHARRIER,%20Guillaume&CHUINE,%20Isabelle&BONHOMME,%20Marc&AMEGLIO,%20Thierry&rft.genre=article


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