Redistribution of water via layering branches between connected parent and daughter trees in Norway spruce clonal groups

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F16%3A43906364" target="_blank" >RIV/62156489:43410/16:43906364 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s00468-015-1157-8" target="_blank" >http://dx.doi.org/10.1007/s00468-015-1157-8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00468-015-1157-8" target="_blank" >10.1007/s00468-015-1157-8</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Redistribution of water via layering branches between connected parent and daughter trees in Norway spruce clonal groups

Popis výsledku v původním jazyce

Layering is an important mode of vegetative reproduction at treeline, in which clonal daughter trees are formed by the rooting of lower (''layering'') branches of the parent tree. These branches mediate the connection between parent (PT) and daughter tree (DT). Here, we measured quantity and direction of sap flow in layering branches as well as PT and DT, and measured shoot water potentials in the crowns of a connected PT and DT. We found bidirectional sap flow pattern in layering branches, with the bidirectionality of the flow resulting from water potential dynamics of the parent and daughter trees varying diurnally. We found that 4.3 % of the total water transpired by the DT was supplied by the PT root system, with up to 25 % of the instantaneous daughter tree sap flow coming from the parent tree. In contrast, water provided by the daughter's root system to the parent tree comprised only a negligible amount, less than 1 % of the parent's entire sap flow. Additionally, after experimental excavation of part ofthe DT roots, layering branch flow towards the DT increased, while flows in the opposite direction almost vanished. This study showed that aboveground clonal connections can facilitate a new type of hydraulic redistribution where water is transported bidirectionally through branches. This transfer of water and nutrients is vital especially in the first years of the daughter tree but supplies considerable amounts of water even several years after the establishment of a new clonal tree.

Název v anglickém jazyce

Redistribution of water via layering branches between connected parent and daughter trees in Norway spruce clonal groups

Popis výsledku anglicky

Layering is an important mode of vegetative reproduction at treeline, in which clonal daughter trees are formed by the rooting of lower (''layering'') branches of the parent tree. These branches mediate the connection between parent (PT) and daughter tree (DT). Here, we measured quantity and direction of sap flow in layering branches as well as PT and DT, and measured shoot water potentials in the crowns of a connected PT and DT. We found bidirectional sap flow pattern in layering branches, with the bidirectionality of the flow resulting from water potential dynamics of the parent and daughter trees varying diurnally. We found that 4.3 % of the total water transpired by the DT was supplied by the PT root system, with up to 25 % of the instantaneous daughter tree sap flow coming from the parent tree. In contrast, water provided by the daughter's root system to the parent tree comprised only a negligible amount, less than 1 % of the parent's entire sap flow. Additionally, after experimental excavation of part ofthe DT roots, layering branch flow towards the DT increased, while flows in the opposite direction almost vanished. This study showed that aboveground clonal connections can facilitate a new type of hydraulic redistribution where water is transported bidirectionally through branches. This transfer of water and nutrients is vital especially in the first years of the daughter tree but supplies considerable amounts of water even several years after the establishment of a new clonal tree.

Druh

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

CEP obor

EF - Botanika

OECD FORD obor

—

Projekt

<a href="/cs/project/EE2.3.20.0265" target="_blank" >EE2.3.20.0265: Indikátory vitality dřevin</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Trees - Structure and Function

ISSN

0931-1890

e-ISSN

—

Svazek periodika

30

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

13

Strana od-do

5-17

Kód UT WoS článku

000373645700002

EID výsledku v databázi Scopus

2-s2.0-84958123647