Elevated CO2 concentration affects vertical distribution of photosynthetic activity in Calamagrostis arundinacea (L.) Roth

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F17%3A00485667" target="_blank" >RIV/86652079:_____/17:00485667 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.11118/beskyd201710010067" target="_blank" >http://dx.doi.org/10.11118/beskyd201710010067</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.11118/beskyd201710010067" target="_blank" >10.11118/beskyd201710010067</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Elevated CO2 concentration affects vertical distribution of photosynthetic activity in Calamagrostis arundinacea (L.) Roth

Popis výsledku v původním jazyce

An understanding of photosynthetic responses to elevated CO2 concentration (EC) across the entire vertical canopy profile will help to achieve more proper simulation of ecosystem responses to expected climate change. Accordingly, we studied changes in vertical gradients of photosynthetic parameters in the grass species Calamagrostis arundinacea under EC at the time of anthesis. Plants were transplanted and grown for 3 years under ambient (385 ppm, AC) and elevated (700 ppm, EC) atmospheric CO2 concentrations in experimental glass domes. In general, EC reduced the variability of photosynthetic activity within the vertical profile of plants. Such changes also altered the differences between AC and EC in the vertical profile. While EC led to greater accumulation of chlorophylls, CO2 assimilation rate, and efficiency of photochemical processes in lower leaves, EC primarily reduced stomatal conductance and transpiration rate in upper leaves. These changes resulted in higher water-use efficiency in lower leaves. On the other hand, we found slightly greater down-regulation of photosynthesis under EC in lower leaves indicated as the A700/A385 ratio. Such knowledge may be important in upscaling EC effects from leaves to the canopy level and modelling impacts of expected climate change on grassland ecosystems.

Název v anglickém jazyce

Elevated CO2 concentration affects vertical distribution of photosynthetic activity in Calamagrostis arundinacea (L.) Roth

Popis výsledku anglicky

An understanding of photosynthetic responses to elevated CO2 concentration (EC) across the entire vertical canopy profile will help to achieve more proper simulation of ecosystem responses to expected climate change. Accordingly, we studied changes in vertical gradients of photosynthetic parameters in the grass species Calamagrostis arundinacea under EC at the time of anthesis. Plants were transplanted and grown for 3 years under ambient (385 ppm, AC) and elevated (700 ppm, EC) atmospheric CO2 concentrations in experimental glass domes. In general, EC reduced the variability of photosynthetic activity within the vertical profile of plants. Such changes also altered the differences between AC and EC in the vertical profile. While EC led to greater accumulation of chlorophylls, CO2 assimilation rate, and efficiency of photochemical processes in lower leaves, EC primarily reduced stomatal conductance and transpiration rate in upper leaves. These changes resulted in higher water-use efficiency in lower leaves. On the other hand, we found slightly greater down-regulation of photosynthesis under EC in lower leaves indicated as the A700/A385 ratio. Such knowledge may be important in upscaling EC effects from leaves to the canopy level and modelling impacts of expected climate change on grassland ecosystems.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

<a href="/cs/project/LO1415" target="_blank" >LO1415: CzechGlobe 2020 - Rozvoj Centra pro studium dopadů globální změny klimatu</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Beskydy

ISSN

1803-2451

e-ISSN

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Svazek periodika

10

Číslo periodika v rámci svazku

1-2

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

7

Strana od-do

67-74

Kód UT WoS článku

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EID výsledku v databázi Scopus

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