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

D 2025

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

URBAN, J.; R.S. MAJEWSKI; M. ŠENFELDR; Josef HÁJEK; J. WEGER et al.

Základní údaje

Originální název

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

Autoři

URBAN, J.; R.S. MAJEWSKI; M. ŠENFELDR; Josef HÁJEK; J. WEGER a Miloš BARTÁK

Vydání

Gent, Belgium, Proceedings of the XII International Workshop on Sap Flow, od s. 51-58, 8 s. 2025

Nakladatel

International Society for Horticultural Science

Další údaje

Jazyk

angličtina

Typ výsledku

Stať ve sborníku

Obor

10600 1.6 Biological sciences

Stát vydavatele

Belgie

Utajení

není předmětem státního či obchodního tajemství

Forma vydání

elektronická verze "online"

Odkazy

URL

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/25:00143768

Organizační jednotka

Přírodovědecká fakulta

ISBN

978-94-6261-418-5

ISSN

DOI

https://doi.org/10.17660/ActaHortic.2025.1419.7

EID Scopus

2-s2.0-86000292209

Klíčová slova anglicky

European ash; net photosynthesis; transpiration; semi-solitary tree; up-scaling of photosynthesis; leaf area distribution

Štítky

14314010, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 25. 2. 2026 11:27, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

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. ‘Atlas’) 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.

Citovat

URBAN, J.; R.S. MAJEWSKI; M. ŠENFELDR; Josef HÁJEK; J. WEGER a Miloš BARTÁK. Azimuthal variability of stomatal conductance and photosynthesis of solitarily grown European ash tree. Online. In Clearwater M., Choi J., Macinnis-Ng C. Proceedings of the XII International Workshop on Sap Flow. Gent, Belgium: International Society for Horticultural Science, 2025, s. 51-58. ISBN 978-94-6261-418-5. Dostupné z: https://doi.org/10.17660/ActaHortic.2025.1419.7.

@inproceedings{2556652,
   author = {Urban, J. and Majewski, R.S. and Šenfeldr, M. and Hájek, Josef and Weger, J. and Barták, Miloš},
   address = {Gent, Belgium},
   booktitle = {Proceedings of the XII International Workshop on Sap Flow},
   doi = {https://doi.org/10.17660/ActaHortic.2025.1419.7},
   editor = {Clearwater M., Choi J., Macinnis-Ng C.},
   keywords = {European ash; net photosynthesis; transpiration; semi-solitary tree; up-scaling of photosynthesis; leaf area distribution},
   howpublished = {elektronická verze "online"},
   language = {eng},
   location = {Gent, Belgium},
   isbn = {978-94-6261-418-5},
   pages = {51-58},
   publisher = {International Society for Horticultural Science},
   title = {Azimuthal variability of stomatal conductance and photosynthesis of solitarily grown European ash tree},
   url = {https://doi.org/10.17660/ActaHortic.2025.1419.7},
   year = {2025}
}

TY  - CONF
ID  - 2556652
AU  - Urban, J. - Majewski, R.S. - Šenfeldr, M. - Hájek, Josef - Weger, J. - Barták, Miloš
PY  - 2025
TI  - Azimuthal variability of stomatal conductance and photosynthesis of solitarily grown European ash tree
PB  - International Society for Horticultural Science
CY  - Gent, Belgium
SN  - 9789462614185
KW  - European ash
KW  - net photosynthesis
KW  - transpiration
KW  - semi-solitary tree
KW  - up-scaling of photosynthesis
KW  - leaf area distribution
UR  - https://doi.org/10.17660/ActaHortic.2025.1419.7
N2  - 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. ‘Atlas’) 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.
ER  -

URBAN, J.; R.S. MAJEWSKI; M. ŠENFELDR; Josef HÁJEK; J. WEGER a Miloš BARTÁK. Azimuthal variability of stomatal conductance and photosynthesis of solitarily grown European ash tree. Online. In Clearwater M., Choi J., Macinnis-Ng C. \textit{Proceedings of the XII International Workshop on Sap Flow}. Gent, Belgium: International Society for Horticultural Science, 2025, s.~51-58. ISBN~978-94-6261-418-5. Dostupné z: https://doi.org/10.17660/ActaHortic.2025.1419.7.

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