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hal.structure.identifierNicholas School of the Environment
dc.contributor.authorMRAD, Assaad
hal.structure.identifierWarnell School of Forest Resources
dc.contributor.authorJOHNSON, Daniel
hal.structure.identifierWarnell School of Forest Resources
dc.contributor.authorLOVE, David
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
hal.structure.identifierNicholas School of the Environment
dc.contributor.authorDOMEC, Jean‐christophe
dc.date.accessioned2024-04-08T11:51:18Z
dc.date.available2024-04-08T11:51:18Z
dc.date.issued2021-06-02
dc.identifier.issn0028-646X
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/195425
dc.description.abstractEnWood anatomical traits shape a xylem segment's hydraulic efficiency and resistance to embolism spread due to declining water potential. It has been known for decades that variations in conduit connectivity play a role in altering xylem hydraulics. However, evaluating the precise effect of conduit connectivity has been elusive. The objective here is to establish an analytical linkage between conduit connectivity and grouping and tissue-scale hydraulics. It is hypothesized that an increase in conduit connectivity brings improved resistance to embolism spread due to increased hydraulic pathway redundancy. However, an increase in conduit connectivity could also reduce resistance due to increased speed of embolism spread with respect to pressure. We elaborate on this trade-off using graph theory, percolation theory and computational modeling of xylem. The results are validated using anatomical measurements of Acer branch xylem. Considering only species with vessels, increases in connectivity improve resistance to embolism spread without negatively affecting hydraulic conductivity. The often measured grouping index fails to capture the totality of the effect of conduit connectivity on xylem hydraulics. Variations in xylem network characteristics, such as conduit connectivity, might explain why hypothesized trends among woody species, such as the 'safety-efficiency' trade-off hypothesis, are weaker than expected.
dc.language.isoen
dc.publisherWiley
dc.rights.urihttp://creativecommons.org/licenses/by-nc/
dc.subject.enAcer (maples)
dc.subject.enconnectivity
dc.subject.enembolism spread
dc.subject.engrouping
dc.subject.enhydraulic conductance
dc.subject.enxylem
dc.title.enThe roles of conduit redundancy and connectivity in xylem hydraulic functions
dc.typeArticle de revue
dc.identifier.doi10.1111/nph.17429
dc.subject.halSciences de l'environnement
bordeaux.journalNew Phytologist
bordeaux.page1-12
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-03251444
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03251444v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=New%20Phytologist&rft.date=2021-06-02&rft.spage=1-12&rft.epage=1-12&rft.eissn=0028-646X&rft.issn=0028-646X&rft.au=MRAD,%20Assaad&JOHNSON,%20Daniel&LOVE,%20David&DOMEC,%20Jean%E2%80%90christophe&rft.genre=article


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