Data from: Axial conduit widening, tree height and height growth rate set the hydraulic transition of sapwood into heartwood

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dc.contributor.affiliationUniversity of Padua - Petit, Giai
dc.contributor.affiliationCentre for Research on Ecology and Forestry Applications - Mencuccini, Maurizio
dc.contributor.affiliationUniversity of Padua - Carrer, Marco
dc.contributor.affiliationUniversity of Padua - Prendin, Angela Luisa
dc.contributor.affiliationUniversity of Helsinki - Hölttä, Teemu
dc.contributor.authorPetit, Giai
dc.contributor.authorMencuccini, Maurizio
dc.contributor.authorCarrer, Marco
dc.contributor.authorPrendin, Angela Luisa
dc.contributor.authorHölttä, Teemu
dc.date.accessioned2025-03-24T15:21:31Z
dc.date.issued2023-07-02
dc.date.issued2023-07-02
dc.descriptionThe size-related xylem adjustments required to maintain a constant leaf-specific sapwood conductance (KLEAF) with increasing height (H) are still under discussion. Alternative hypotheses are that: (i) the conduit hydraulic diameter (Dh) at any position in the stem and/or (ii) the number of sapwood rings at stem base (NSWr) increase with H. In addition, (iii) lower stem elongation (ΔH) increases the tip-to-base conductance through inner xylem rings, thus possibly the NSWr contributing to KLEAF. A detailed stem analysis showed that Dh increased with the distance from the apex (DCA) in all rings of a P. abies and a F. sylvatica tree. Net of DCA effect, Dh did not increase with H. Using sapwood traits from a global dataset, NSWr increased with H and decreased with ΔH, and the mean sapwood ring width (SWrw) increased with ΔH. A numerical model based on anatomical patterns predicted the effects of H and ΔH on the conductance of inner xylem rings. Results suggested the sapwood/heartwood transition depends on both H and ΔH, and is set when the C allocation to maintenance respiration of living cells in inner sapwood rings produces a lower gain in total conductance than investing the same C in new vascular conduits.
dc.identifierhttps://doi.org/10.5061/dryad.pg4f4qrv9
dc.identifier.urihttps://hydatakatalogi-test-24.it.helsinki.fi/handle/123456789/10941
dc.rightsOpen
dc.rights.licensecc-zero
dc.subjectPicea abies
dc.subjectFagus sylvatica
dc.subjectxylem sapwood
dc.subjecttree rings
dc.subjecttracheid lumen size
dc.subjectgrowth rate
dc.subjectgrowth rings
dc.subjectvessel size
dc.subjectxylem anatomy
dc.subjecttree height
dc.subjecttree height growth
dc.subjectconduit widening
dc.titleData from: Axial conduit widening, tree height and height growth rate set the hydraulic transition of sapwood into heartwood
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