Stem-mediated hydraulic redistribution in large roots on opposing sides of a Douglas-fir tree following localised irrigation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F09%3A00142293" target="_blank" >RIV/62156489:43410/09:00142293 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Stem-mediated hydraulic redistribution in large roots on opposing sides of a Douglas-fir tree following localised irrigation

Popis výsledku v původním jazyce

Increasing evidence about hydraulic redistribution (HR) and its ecological consequences is emerging. HR results from an interplay between competing plant and soil water potential gradients. In this work, stem-mediated HR was studied in a 53-year-old Douglas-fir tree during a period of drought. Sap flux density measurements using the heat field deformation method were performed at four locations: in two large opposing roots and on two sides of the tree stem. HR was induced by localised irrigation on oneof the measured roots creating heterogeneous soil water conditions. Stem-mediated HR was detected during night-time conditions when water was redistributed from the wet side of the tree to the non-irrigated dry side. Beside stem-mediated HR, bi-directional flow in the dry root was also observed indicating radial sectoring in the xylem. It was observed that through stem-mediated HR Douglas-fir was unable to increase its transpiration despite the fact that sufficient water was available to

Název v anglickém jazyce

Stem-mediated hydraulic redistribution in large roots on opposing sides of a Douglas-fir tree following localised irrigation

Popis výsledku anglicky

Increasing evidence about hydraulic redistribution (HR) and its ecological consequences is emerging. HR results from an interplay between competing plant and soil water potential gradients. In this work, stem-mediated HR was studied in a 53-year-old Douglas-fir tree during a period of drought. Sap flux density measurements using the heat field deformation method were performed at four locations: in two large opposing roots and on two sides of the tree stem. HR was induced by localised irrigation on oneof the measured roots creating heterogeneous soil water conditions. Stem-mediated HR was detected during night-time conditions when water was redistributed from the wet side of the tree to the non-irrigated dry side. Beside stem-mediated HR, bi-directional flow in the dry root was also observed indicating radial sectoring in the xylem. It was observed that through stem-mediated HR Douglas-fir was unable to increase its transpiration despite the fact that sufficient water was available to

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EF - Botanika

OECD FORD obor

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Projekt

<a href="/cs/project/QG60063" target="_blank" >QG60063: Douglaska tisolistá - nejvýznamnější introdukovaná dřevina v polyfunkčním a trvale udržitelném lesním hospodářství</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2009

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

New Phytologist

ISSN

0028-646X

e-ISSN

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Svazek periodika

184

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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