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Tytuł:
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Magnetic resonance imaging suggests functional role of previous year vessels and fibres in ring-porous sap flow resumption.
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Autorzy:
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Copini P; Forest Ecology and Forest Management Group, Wageningen University & Research, PO Box 47, AA Wageningen, The Netherlands.; Wageningen Environmental Research, Wageningen University & Research, PO Box 47, AA Wageningen, The Netherlands.
Vergeldt FJ; Laboratory of Biophysics and MAGNetic resonance research FacilitY (MAGNEFY), Wageningen University & Research, Postbus 8128, 6700ET Wageningen, The Netherlands.
Fonti P; Swiss Federal Institute for Forest Snow and Landscape Research WSL, CH-8903 Birmensdorf, Switzerland.
Sass-Klaassen U; Forest Ecology and Forest Management Group, Wageningen University & Research, PO Box 47, AA Wageningen, The Netherlands.
den Ouden J; Forest Ecology and Forest Management Group, Wageningen University & Research, PO Box 47, AA Wageningen, The Netherlands.
Sterck F; Forest Ecology and Forest Management Group, Wageningen University & Research, PO Box 47, AA Wageningen, The Netherlands.
Decuyper M; Forest Ecology and Forest Management Group, Wageningen University & Research, PO Box 47, AA Wageningen, The Netherlands.; Laboratory of Geo-Information Science and Remote Sensing, Wageningen University & Research, PO Box 47, AA Wageningen, The Netherlands.
Gerkema E; Laboratory of Biophysics and MAGNetic resonance research FacilitY (MAGNEFY), Wageningen University & Research, Postbus 8128, 6700ET Wageningen, The Netherlands.
Windt CW; IBG-2: Plant Sciences, Institute of Bio- and Geosciences, Forschungszentrum Jülich, 52425 Jülich, Germany.
Van As H; Laboratory of Biophysics and MAGNetic resonance research FacilitY (MAGNEFY), Wageningen University & Research, Postbus 8128, 6700ET Wageningen, The Netherlands.
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Źródło:
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Tree physiology [Tree Physiol] 2019 Jun 01; Vol. 39 (6), pp. 1009-1018.
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Typ publikacji:
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Journal Article; Research Support, Non-U.S. Gov't
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Język:
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English
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Imprint Name(s):
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Publication: Oxford : Oxford University Press
Original Publication: Victoria, [B.C.] : Heron Pub., c1986-
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MeSH Terms:
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Quercus/*physiology
Water/*metabolism
Wood/*physiology
Magnetic Resonance Imaging ; Porosity ; Seasons
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Contributed Indexing:
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Keywords: MRI; Quercus robur L; cambial activity; earlywood vessel formation; phenology; water content; water flow
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Substance Nomenclature:
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059QF0KO0R (Water)
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Entry Date(s):
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Date Created: 20190322 Date Completed: 20200205 Latest Revision: 20200205
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Update Code:
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20240105
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DOI:
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10.1093/treephys/tpz019
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PMID:
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30896019
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Reactivation of axial water flow in ring-porous species is a complex process related to stem water content and developmental stage of both earlywood-vessel and leaf formation. Yet empirical evidence with non-destructive methods on the dynamics of water flow resumption in relation to these mechanisms is lacking. Here we combined in vivo magnetic resonance imaging and wood-anatomical observations to monitor the dynamic changes in stem water content and flow during spring reactivation in 4-year-old pedunculate oaks (Quercus robur L.) saplings. We found that previous year latewood vessels and current year developing earlywood vessels form a functional unit for water flow during growth resumption. During spring reactivation, water flow shifted from latewood towards the new earlywood, paralleling the formation of earlywood vessels and leaves. At leaves' full expansion, volumetric water content of previous rings drastically decreased due to the near-absence of water in fibre tissue. We conclude (i) that in ring-porous oak, latewood vessels play an important hydraulic role for bridging the transition between old and new water-conducting vessels and (ii) that fibre and parenchyma provides a place for water storage.
(© The Author(s) 2019. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.)
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