Seasonal Photosynthetic Activity in the Crown Compartments of European Ash (Fraxinus excelsior)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027073%3A_____%2F24%3AN0000021" target="_blank" >RIV/00027073:_____/24:N0000021 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.mdpi.com/1999-4907/15/4/699" target="_blank" >https://www.mdpi.com/1999-4907/15/4/699</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/f15040699" target="_blank" >10.3390/f15040699</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Seasonal Photosynthetic Activity in the Crown Compartments of European Ash (Fraxinus excelsior)

Popis výsledku v původním jazyce

Leaves facing different directions (north, south, east, and west) receive differing levels of illumination, resulting in spatial differences in photosynthesis P-N in the crowns of mature trees. We measured diurnal trends in P-N for a semi-solitary European ash (Fraxinus excelsior) over spring, summer, and autumn and compared these data with leaf biometric traits and leaf area distribution. The highest light-saturated P-N (P-Nmax) was to the south and west, and the lowest to the north. Likewise, intrinsic water use efficiency, defined as the ratio (P-N:g(S)) of photosynthetic rate (P-N) and stomatal conductance (g(S)), was also lowest to the north. The thickest leaves were found on the northern face and the thinnest in the south, suggesting differences in leaf anatomy may have contributed to differences in P-N. The greatest leaf area was recorded in the southern crown quadrant, which contributed more than 50% of the tree's accumulated P-N. Our research emphasises the importance of choosing representative leaves for gas exchange measurements. In-depth studies into the spatial distribution of leaves and their traits will be necessary for accurate upscaling of leaf-level photosynthesis to whole tree and canopy levels.

Název v anglickém jazyce

Seasonal Photosynthetic Activity in the Crown Compartments of European Ash (Fraxinus excelsior)

Popis výsledku anglicky

Leaves facing different directions (north, south, east, and west) receive differing levels of illumination, resulting in spatial differences in photosynthesis P-N in the crowns of mature trees. We measured diurnal trends in P-N for a semi-solitary European ash (Fraxinus excelsior) over spring, summer, and autumn and compared these data with leaf biometric traits and leaf area distribution. The highest light-saturated P-N (P-Nmax) was to the south and west, and the lowest to the north. Likewise, intrinsic water use efficiency, defined as the ratio (P-N:g(S)) of photosynthetic rate (P-N) and stomatal conductance (g(S)), was also lowest to the north. The thickest leaves were found on the northern face and the thinnest in the south, suggesting differences in leaf anatomy may have contributed to differences in P-N. The greatest leaf area was recorded in the southern crown quadrant, which contributed more than 50% of the tree's accumulated P-N. Our research emphasises the importance of choosing representative leaves for gas exchange measurements. In-depth studies into the spatial distribution of leaves and their traits will be necessary for accurate upscaling of leaf-level photosynthesis to whole tree and canopy levels.

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

2024

Kód důvěrnosti údajů

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

Název periodika

FORESTS

ISSN

—

e-ISSN

1999-4907

Svazek periodika

15

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

18

Strana od-do

699

Kód UT WoS článku

001219439000001

EID výsledku v databázi Scopus

2-s2.0-85191377907