Show simple item record

Monitoring of freezing dynamics in trees: a simple phase shift causes complexity

dc.rights.licenseopenen_US
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
hal.structure.identifierEcophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]
dc.contributor.authorCHARRIER, Guillaume
dc.contributor.authorNOLF, Markus
dc.contributor.authorLEITINGER, Georg
dc.contributor.authorCHARRA-VASKOU, Katline
dc.contributor.authorLOSSO, Adriano
dc.contributor.authorTAPPEINER, Ulrike
dc.contributor.authorAMEGLIO, Thierry
dc.contributor.authorMAYR, Stefan
dc.date.accessioned2020-04-03T12:17:42Z
dc.date.available2020-04-03T12:17:42Z
dc.date.issued2017
dc.identifier.issn0032-0889en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/4095
dc.description.abstractEnDuring winter, trees have to cope with harsh conditions, including extreme freeze-thaw stress. This study focused on ice nucleation and propagation, related water shifts and xylem cavitation, as well as cell damage and was based on in situ monitoring of xylem (thermocouples) and surface temperatures (infrared imaging), ultrasonic emissions, and dendrometer analysis. Field experiments during late winter on Picea abies growing at the alpine timberline revealed three distinct freezing patterns: (1) from the top of the tree toward the base, (2) from thin branches toward the main stem's top and base, and (3) from the base toward the top. Infrared imaging showed freezing within branches from their base toward distal parts. Such complex freezing causes dynamic and heterogenous patterns in water potential and probably in cavitation. This study highlights the interaction between environmental conditions upon freezing and thawing and demonstrates the enormous complexity of freezing processes in trees. Diameter shrinkage, which indicated water fluxes within the stem, and acoustic emission analysis, which indicated cavitation events near the ice front upon freezing, were both related to minimum temperature and, upon thawing, related to vapor pressure deficit and soil temperature. These complex patterns, emphasizing the common mechanisms between frost and drought stress, shed new light on winter tree physiology.
dc.language.isoENen_US
dc.subjectStress thermique
dc.subjectCavitation
dc.subjectPériode hivernale
dc.subjectArbre forestier
dc.subjectCamera infrarouge
dc.subjectDendromètre
dc.title.enMonitoring of freezing dynamics in trees: a simple phase shift causes complexity
dc.title.alternativePlant physiol.en_US
dc.typeArticle de revueen_US
dc.identifier.doi10.1104/pp.16.01815
dc.subject.halSciences du Vivant [q-bio]/Biologie végétaleen_US
dc.identifier.pubmed28242655en_US
bordeaux.journalPlant Physiologyen_US
bordeaux.page2196-2207en_US
bordeaux.volume173en_US
bordeaux.hal.laboratoriesEcophysiologie et Génomique Fonctionnelle de la Vigne (EGFV) - UMR 1287en_US
bordeaux.issue4en_US
bordeaux.institutionBordeaux Sciences Agroen_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
hal.identifierhal-03170509
hal.version1
hal.date.transferred2021-03-16T10:27:43Z
hal.exporttrue
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Plant%20Physiology&rft.date=2017&rft.volume=173&rft.issue=4&rft.spage=2196-2207&rft.epage=2196-2207&rft.eissn=0032-0889&rft.issn=0032-0889&rft.au=CHARRIER,%20Guillaume&NOLF,%20Markus&LEITINGER,%20Georg&CHARRA-VASKOU,%20Katline&LOSSO,%20Adriano&rft.genre=article


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record