Linking xylem water storage with anatomical parameters in five temperate tree species

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F16%3A10327903" target="_blank" >RIV/00216208:11310/16:10327903 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/16:00090049

Výsledek na webu

<a href="http://dx.doi.org/10.1093/treephys/tpw020" target="_blank" >http://dx.doi.org/10.1093/treephys/tpw020</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/treephys/tpw020" target="_blank" >10.1093/treephys/tpw020</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Linking xylem water storage with anatomical parameters in five temperate tree species

Popis výsledku v původním jazyce

The release of water from storage compartments to the transpiration stream is an important functional mechanism that provides the buffering of sudden fluctuations in water potential. The ability of tissues to release water per change in water potential, referred to as hydraulic capacitance, is assumed to be associated with the anatomy of storage tissues. However, information about how specific anatomical parameters determine capacitance is limited. In this study, we measured sapwood capacitance (C) in terminal branches and roots of five temperate tree species (Fagus sylvatica L., Picea abies L., Quercus robur L., Robinia pseudoacacia L., Tilia cordata Mill.). Capacitance was calculated separately for water released mainly from capillary (C-I; open vessels, tracheids, fibres, intercellular spaces and cracks) and elastic storage compartments (C-II; living parenchyma cells), corresponding to two distinct phases of the moisture release curve. We found that C was generally higher in roots than branches, with C-I being 3-11 times higher than C-II. Sapwood density and the ratio of dead to living xylem cells were most closely correlated with C. In addition, the magnitude of C-I was strongly correlated with fibre/tracheid lumen area, whereas C-II was highly dependent on the thickness of axial parenchyma cell walls. Our results indicate that water released from capillary compartments predominates over water released from elastic storage in both branches and roots, suggesting the limited importance of parenchyma cells for water storage in juvenile xylem of temperate tree species. Contrary to intact organs, water released from open conduits in our small wood samples significantly increased C-I at relatively high water potentials. Linking anatomical parameters with the hydraulic capacitance of a tissue contributes to a better understanding of water release mechanisms and their implications for plant hydraulics.

Název v anglickém jazyce

Linking xylem water storage with anatomical parameters in five temperate tree species

Popis výsledku anglicky

The release of water from storage compartments to the transpiration stream is an important functional mechanism that provides the buffering of sudden fluctuations in water potential. The ability of tissues to release water per change in water potential, referred to as hydraulic capacitance, is assumed to be associated with the anatomy of storage tissues. However, information about how specific anatomical parameters determine capacitance is limited. In this study, we measured sapwood capacitance (C) in terminal branches and roots of five temperate tree species (Fagus sylvatica L., Picea abies L., Quercus robur L., Robinia pseudoacacia L., Tilia cordata Mill.). Capacitance was calculated separately for water released mainly from capillary (C-I; open vessels, tracheids, fibres, intercellular spaces and cracks) and elastic storage compartments (C-II; living parenchyma cells), corresponding to two distinct phases of the moisture release curve. We found that C was generally higher in roots than branches, with C-I being 3-11 times higher than C-II. Sapwood density and the ratio of dead to living xylem cells were most closely correlated with C. In addition, the magnitude of C-I was strongly correlated with fibre/tracheid lumen area, whereas C-II was highly dependent on the thickness of axial parenchyma cell walls. Our results indicate that water released from capillary compartments predominates over water released from elastic storage in both branches and roots, suggesting the limited importance of parenchyma cells for water storage in juvenile xylem of temperate tree species. Contrary to intact organs, water released from open conduits in our small wood samples significantly increased C-I at relatively high water potentials. Linking anatomical parameters with the hydraulic capacitance of a tissue contributes to a better understanding of water release mechanisms and their implications for plant hydraulics.

Druh

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

CEP obor

ED - Fyziologie

OECD FORD obor

—

Projekt

<a href="/cs/project/LO1417" target="_blank" >LO1417: Centrum experimentální biologie rostlin UK</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Tree Physiology

ISSN

0829-318X

e-ISSN

—

Svazek periodika

36

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

CA - Kanada

Počet stran výsledku

14

Strana od-do

756-769

Kód UT WoS článku

000381283600008

EID výsledku v databázi Scopus

2-s2.0-84978823377