Azimuthal variability of stomatal conductance and photosynthesis of solitarily grown European ash tree

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F25%3A43926792" target="_blank" >RIV/62156489:43410/25:43926792 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/25:00143768 RIV/00027073:_____/25:N0000087

Výsledek na webu

<a href="https://doi.org/10.17660/ActaHortic.2025.1419.7" target="_blank" >https://doi.org/10.17660/ActaHortic.2025.1419.7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.17660/ActaHortic.2025.1419.7" target="_blank" >10.17660/ActaHortic.2025.1419.7</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Azimuthal variability of stomatal conductance and photosynthesis of solitarily grown European ash tree

Popis výsledku v původním jazyce

Different illumination of the leaves facing various azimuth sides results in spatial differences in stomatal conductance (gs) and photosynthesis (PN) within the crowns of mature trees. We measured diurnal courses of gs and PN of semi-solitary European Ash (Fraxinus excelsior L. &apos;Atlas&apos;) in four azimuth directions in spring, summer, and autumn. The gs and PN were the largest in the south-facing leaves. The PN per the unit of area in the east was larger than in the west due to the increase of vapor pressure deficit in the afternoon and consecutive decline in gs. The gs calculated from sap flow well matched the values from the leaf level measurements. Sap flow measured on the stem could not capture the variability within the crown but it integrated the gs of the whole tree. Our research emphasizes the importance of choosing representative leaves for gas exchange measurements. Sap flow may aid in the upscaling leaf-level photosynthesis to the whole tree and a canopy level.

Název v anglickém jazyce

Azimuthal variability of stomatal conductance and photosynthesis of solitarily grown European ash tree

Popis výsledku anglicky

Different illumination of the leaves facing various azimuth sides results in spatial differences in stomatal conductance (gs) and photosynthesis (PN) within the crowns of mature trees. We measured diurnal courses of gs and PN of semi-solitary European Ash (Fraxinus excelsior L. &apos;Atlas&apos;) in four azimuth directions in spring, summer, and autumn. The gs and PN were the largest in the south-facing leaves. The PN per the unit of area in the east was larger than in the west due to the increase of vapor pressure deficit in the afternoon and consecutive decline in gs. The gs calculated from sap flow well matched the values from the leaf level measurements. Sap flow measured on the stem could not capture the variability within the crown but it integrated the gs of the whole tree. Our research emphasizes the importance of choosing representative leaves for gas exchange measurements. Sap flow may aid in the upscaling leaf-level photosynthesis to the whole tree and a canopy level.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

40102 - Forestry

Projekt

<a href="/cs/project/GA21-11487S" target="_blank" >GA21-11487S: Adaptace, vyhnutí, nebo vyhynutí: propojení ekologie společenstev a ekofyziologie k porozumění vlivu vlhkostního deficitu v temperátních lesích</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název statě ve sborníku

Acta Horticulturae 1419

ISBN

978-94-6261-418-5

ISSN

0567-7572

e-ISSN

2406-6168

Počet stran výsledku

7

Strana od-do

51-57

Název nakladatele

International Society for Horticultural Science (ISHS)

Místo vydání

Leuven

Místo konání akce

Rotorua

Datum konání akce

31. 10. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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