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Tree water uptake enhances nitrogen acquisition in a fertilized boreal forest but not under nitrogen-poor conditions
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SYSNO ASEP 0559316 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Tree water uptake enhances nitrogen acquisition in a fertilized boreal forest but not under nitrogen-poor conditions Author(s) Henriksson, N. (SE)
Lim, H. (SE)
Marshall, John David (UEK-B) RID, SAI
Franklin, O. (SE)
McMurtrie, R. E. (AU)
Lutter, R. (EE)
Magh, R. (SE)
Lundmark, T. (SE)
Nasholm, T. (SE)Number of authors 9 Source Title New Phytologist - ISSN 0028-646X
Roč. 232, č. 1 (2021), s. 113-122Number of pages 10 s. Language eng - English Country GB - United Kingdom Keywords n-15 ; deuterium ; diffusion ; isotope ; mass flow ; nitrogen uptake ; Pinus sylvestris (Scots pine) ; water uptake Subject RIV EF - Botanics OECD category Plant sciences, botany Method of publishing Open access Institutional support UEK-B - RVO:86652079 UT WOS 000675530300001 EID SCOPUS 85110986635 DOI 10.1111/nph.17578 Annotation Understanding how plant water uptake interacts with acquisition of soil nitrogen (N) and other nutrients is fundamental for predicting plant responses to a changing environment, but it is an area where models disagree. We present a novel isotopic labelling approach which reveals spatial patterns of water and N uptake, and their interaction, by trees. The stable isotopes N-15 and H-2 were applied to a small area of the forest floor in stands with high and low soil N availability. Uptake by surrounding trees was measured. The sensitivity of N acquisition to water uptake was quantified by statistical modelling. Trees in the high-N stand acquired twice as much N-15 as in the low-N stand and around half of their N uptake was dependent on water uptake (H-2 enrichment). By contrast, in the low-N stand there was no positive effect of water uptake on N uptake. We conclude that tree N acquisition was only marginally dependent on water flux toward the root surface under low-N conditions whereas under high-N conditions, the water-associated N uptake was substantial. The results suggest a fundamental shift in N acquisition strategy under high-N conditions. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2023 Electronic address https://nph.onlinelibrary.wiley.com/doi/10.1111/nph.17578
Number of the records: 1