Magnetic resonance imaging suggests functional role of previous year vessels and fibres in ring-porous sap flow resumption

Paul Copini, Frank J. Vergeldt, Patrick Fonti*, Ute Sass-Klaassen, Jan Den Ouden, Frank Sterck, Mathieu Decuyper, Edo Gerkema, Carel W. Windt, Henk Van As

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

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.
Original languageEnglish
Pages (from-to)1009-1018
JournalTree Physiology
Volume39
Early online date2019
DOIs
Publication statusPublished - 2019

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sap flow
xylem vessels
magnetic resonance imaging
earlywood
water flow
Magnetic Resonance Imaging
latewood
Water
water content
Quercus
leaves
stems
water
nondestructive methods
Quercus robur
saplings
fluid mechanics
developmental stages
monitoring

Cite this

@article{083dc031759147ea83854f295d66ecd5,
title = "Magnetic resonance imaging suggests functional role of previous year vessels and fibres in ring-porous sap flow resumption",
abstract = "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.",
author = "Paul Copini and Vergeldt, {Frank J.} and Patrick Fonti and Ute Sass-Klaassen and {Den Ouden}, Jan and Frank Sterck and Mathieu Decuyper and Edo Gerkema and Windt, {Carel W.} and {Van As}, Henk",
year = "2019",
doi = "10.1093/treephys/tpz019",
language = "English",
volume = "39",
pages = "1009--1018",
journal = "Tree Physiology",
issn = "0829-318X",
publisher = "Oxford University Press",

}

TY - JOUR

T1 - Magnetic resonance imaging suggests functional role of previous year vessels and fibres in ring-porous sap flow resumption

AU - Copini, Paul

AU - Vergeldt, Frank J.

AU - Fonti, Patrick

AU - Sass-Klaassen, Ute

AU - Den Ouden, Jan

AU - Sterck, Frank

AU - Decuyper, Mathieu

AU - Gerkema, Edo

AU - Windt, Carel W.

AU - Van As, Henk

PY - 2019

Y1 - 2019

N2 - 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.

AB - 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.

U2 - 10.1093/treephys/tpz019

DO - 10.1093/treephys/tpz019

M3 - Article

VL - 39

SP - 1009

EP - 1018

JO - Tree Physiology

JF - Tree Physiology

SN - 0829-318X

ER -