Ion-mediated increases in xylem hydraulic conductivity: seasonal differences between coexisting ring- and diffuse-porous temperate tree species

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F19%3A00112366" target="_blank" >RIV/00216224:14310/19:00112366 - isvavai.cz</a>

Výsledek na webu

<a href="https://academic.oup.com/treephys/article-abstract/39/8/1313/5425283?redirectedFrom=fulltext" target="_blank" >https://academic.oup.com/treephys/article-abstract/39/8/1313/5425283?redirectedFrom=fulltext</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/treephys/tpz035" target="_blank" >10.1093/treephys/tpz035</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ion-mediated increases in xylem hydraulic conductivity: seasonal differences between coexisting ring- and diffuse-porous temperate tree species

Popis výsledku v původním jazyce

Ion-mediated changes in hydraulic conductivity (Delta K-h) represent a mechanism allowing plants to regulate the rate of xylem transport. However, the significance of Delta K-h for ring-porous (RPS) and diffuse-porous tree species (DPS) remains unknown. Here, we examined Delta K-h in young branches of three coexisting, temperate RPS (Fraxinus excelsior, Quercus robur, Robinia pseudoacacia) and three DPS (Acer pseudoplatanus, Carpinus betulus, Fagus sylvatica) across the whole year, and assessed the relationships of Delta K-h to branch anatomy. Ring-porous species exhibited twice as high Delta K-h (10.3% vs 5.3%) within the growing season (i.e., during wood production) compared with DPS, and the production of the annual ring was identified as a crucial process affecting maximum Delta K-h within the season. In addition, xylem in branches of RPS generally contained more axial parenchyma (AP; 18% vs 7%) and was characterized by a greater relative contact fraction between vessels and parenchyma (FVP; 59% vs 18%) than xylem in DPS. Simultaneously, Delta K-h measured within the growing season was positively correlated with AP, FVP and bark proportions, suggesting that parenchyma in branches may be important for high Delta K-h. Significant increase in Delta K-h observed during the growing season may help RPS to restore conductive capacity after winter, better compensate transport loss by drought-induced embolism and thereby improve water delivery to leaves.

Název v anglickém jazyce

Ion-mediated increases in xylem hydraulic conductivity: seasonal differences between coexisting ring- and diffuse-porous temperate tree species

Popis výsledku anglicky

Ion-mediated changes in hydraulic conductivity (Delta K-h) represent a mechanism allowing plants to regulate the rate of xylem transport. However, the significance of Delta K-h for ring-porous (RPS) and diffuse-porous tree species (DPS) remains unknown. Here, we examined Delta K-h in young branches of three coexisting, temperate RPS (Fraxinus excelsior, Quercus robur, Robinia pseudoacacia) and three DPS (Acer pseudoplatanus, Carpinus betulus, Fagus sylvatica) across the whole year, and assessed the relationships of Delta K-h to branch anatomy. Ring-porous species exhibited twice as high Delta K-h (10.3% vs 5.3%) within the growing season (i.e., during wood production) compared with DPS, and the production of the annual ring was identified as a crucial process affecting maximum Delta K-h within the season. In addition, xylem in branches of RPS generally contained more axial parenchyma (AP; 18% vs 7%) and was characterized by a greater relative contact fraction between vessels and parenchyma (FVP; 59% vs 18%) than xylem in DPS. Simultaneously, Delta K-h measured within the growing season was positively correlated with AP, FVP and bark proportions, suggesting that parenchyma in branches may be important for high Delta K-h. Significant increase in Delta K-h observed during the growing season may help RPS to restore conductive capacity after winter, better compensate transport loss by drought-induced embolism and thereby improve water delivery to leaves.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10611 - Plant sciences, botany

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

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

1758-4469

Svazek periodika

39

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

16

Strana od-do

1313-1328

Kód UT WoS článku

000493055600005

EID výsledku v databázi Scopus

2-s2.0-85071700578