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The effect of elevated CO2 on photosynthesis is modulated by nitrogen supply and reduced water availability in Picea abies
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SYSNO ASEP 0573106 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The effect of elevated CO2 on photosynthesis is modulated by nitrogen supply and reduced water availability in Picea abies Author(s) Ofori-Amanfo, Kojo Kwakye (UEK-B) SAI, ORCID, RID
Klem, Karel (UEK-B) RID, ORCID, SAI
Veselá, Barbora (UEK-B) SAI, RID
Holub, Petr (UEK-B) RID, ORCID, SAI
Agyei, Thomas (UEK-B) ORCID, SAI, RID
Juráň, Stanislav (UEK-B) RID, SAI
Grace, John (UEK-B) SAI, RID
Marek, Michal V. (UEK-B) RID, ORCID, SAI
Urban, Otmar (UEK-B) RID, ORCID, SAISource Title Tree Physiology - ISSN 0829-318X
Roč. 43, č. 6 (2023), s. 925-937Number of pages 13 s. Language eng - English Country GB - United Kingdom Keywords chlorophyll fluorescence ; climate change ; elevated carbon dioxide ; mineral supply ; plant physiology ; Rubisco carboxylation rate ; water availability Subject RIV GK - Forestry OECD category Forestry R&D Projects EF16_019/0000797 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure CzeCOS IV - 90248 - Ústav výzkumu globální změny AV ČR, v. v. i. Method of publishing Limited access Institutional support UEK-B - RVO:86652079 UT WOS 000960357700001 EID SCOPUS 85163183778 DOI 10.1093/treephys/tpad024 Annotation It is assumed that the stimulatory effects of elevated CO2 concentration ([CO2]) on photosynthesis and growth may be substantially reduced by co-occurring environmental factors and the length of CO2 treatment. Here, we present the study exploring the interactive effects of three manipulated factors ([CO2], nitrogen supply and water availability) on physiological (gas-exchange and chlorophyll fluorescence), morphological and stoichiometric traits of Norway spruce (Picea abies) saplings after 2 and 3 years of the treatment under natural field conditions. Such multifactorial studies, going beyond two-way interactions, have received only limited attention until now. Our findings imply a significant reduction of [CO2]-enhanced rate of CO2 assimilation under reduced water availability which deepens with the severity of water depletion. Similarly, insufficient nitrogen availability leads to a down-regulation of photosynthesis under elevated [CO2] being particularly associated with reduced carboxylation efficiency of the Rubisco enzyme. Such adjustments in the photosynthesis machinery result in the stimulation of water-use efficiency under elevated [CO2] only when it is combined with a high nitrogen supply and reduced water availability. These findings indicate limited effects of elevated [CO2] on carbon uptake in temperate coniferous forests when combined with naturally low nitrogen availability and intensifying droughts during the summer periods. Such interactions have to be incorporated into the mechanistic models predicting changes in terrestrial carbon sequestration and forest growth in the future. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2024 Electronic address https://academic.oup.com/treephys/article/43/6/925/7067529?login=true
Number of the records: 1