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Water limitation intensity shifts carbon allocation dynamics in Scots pine mesocosms

BACKGROUND AND AIMS: Tree species worldwide suffer from extended periods of water limitation. These conditions not only affect the growth and vitality of trees but also feed back on the cycling of carbon (C) at the plant-soil interface. However, the impact of progressing water loss from soils on the...

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Autores principales: Solly, Emily F., Jaeger, Astrid C. H., Barthel, Matti, Werner, Roland A., Zürcher, Alois, Hagedorn, Frank, Six, Johan, Hartmann, Martin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer International Publishing 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10533586/
https://www.ncbi.nlm.nih.gov/pubmed/37780069
http://dx.doi.org/10.1007/s11104-023-06093-5
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author Solly, Emily F.
Jaeger, Astrid C. H.
Barthel, Matti
Werner, Roland A.
Zürcher, Alois
Hagedorn, Frank
Six, Johan
Hartmann, Martin
author_facet Solly, Emily F.
Jaeger, Astrid C. H.
Barthel, Matti
Werner, Roland A.
Zürcher, Alois
Hagedorn, Frank
Six, Johan
Hartmann, Martin
author_sort Solly, Emily F.
collection PubMed
description BACKGROUND AND AIMS: Tree species worldwide suffer from extended periods of water limitation. These conditions not only affect the growth and vitality of trees but also feed back on the cycling of carbon (C) at the plant-soil interface. However, the impact of progressing water loss from soils on the transfer of assimilated C belowground remains unresolved. METHODS: Using mesocosms, we assessed how increasing levels of water deficit affect the growth of Pinus sylvestris saplings and performed a (13)C-CO(2) pulse labelling experiment to trace the pathway of assimilated C into needles, fine roots, soil pore CO(2,) and phospholipid fatty acids of soil microbial groups. RESULTS: With increasing water limitation, trees partitioned more biomass belowground at the expense of aboveground growth. Moderate levels of water limitation barely affected the uptake of (13)C label and the transit time of C from needles to the soil pore CO(2). Comparatively, more severe water limitation increased the fraction of (13)C label that trees allocated to fine roots and soil fungi while a lower fraction of (13)CO(2) was readily respired from the soil. CONCLUSIONS: When soil water becomes largely unavailable, C cycling within trees becomes slower, and a fraction of C allocated belowground may accumulate in fine roots or be transferred to the soil and associated microorganisms without being metabolically used. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s11104-023-06093-5.
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spelling pubmed-105335862023-09-29 Water limitation intensity shifts carbon allocation dynamics in Scots pine mesocosms Solly, Emily F. Jaeger, Astrid C. H. Barthel, Matti Werner, Roland A. Zürcher, Alois Hagedorn, Frank Six, Johan Hartmann, Martin Plant Soil Research Article BACKGROUND AND AIMS: Tree species worldwide suffer from extended periods of water limitation. These conditions not only affect the growth and vitality of trees but also feed back on the cycling of carbon (C) at the plant-soil interface. However, the impact of progressing water loss from soils on the transfer of assimilated C belowground remains unresolved. METHODS: Using mesocosms, we assessed how increasing levels of water deficit affect the growth of Pinus sylvestris saplings and performed a (13)C-CO(2) pulse labelling experiment to trace the pathway of assimilated C into needles, fine roots, soil pore CO(2,) and phospholipid fatty acids of soil microbial groups. RESULTS: With increasing water limitation, trees partitioned more biomass belowground at the expense of aboveground growth. Moderate levels of water limitation barely affected the uptake of (13)C label and the transit time of C from needles to the soil pore CO(2). Comparatively, more severe water limitation increased the fraction of (13)C label that trees allocated to fine roots and soil fungi while a lower fraction of (13)CO(2) was readily respired from the soil. CONCLUSIONS: When soil water becomes largely unavailable, C cycling within trees becomes slower, and a fraction of C allocated belowground may accumulate in fine roots or be transferred to the soil and associated microorganisms without being metabolically used. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s11104-023-06093-5. Springer International Publishing 2023-06-17 2023 /pmc/articles/PMC10533586/ /pubmed/37780069 http://dx.doi.org/10.1007/s11104-023-06093-5 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Research Article
Solly, Emily F.
Jaeger, Astrid C. H.
Barthel, Matti
Werner, Roland A.
Zürcher, Alois
Hagedorn, Frank
Six, Johan
Hartmann, Martin
Water limitation intensity shifts carbon allocation dynamics in Scots pine mesocosms
title Water limitation intensity shifts carbon allocation dynamics in Scots pine mesocosms
title_full Water limitation intensity shifts carbon allocation dynamics in Scots pine mesocosms
title_fullStr Water limitation intensity shifts carbon allocation dynamics in Scots pine mesocosms
title_full_unstemmed Water limitation intensity shifts carbon allocation dynamics in Scots pine mesocosms
title_short Water limitation intensity shifts carbon allocation dynamics in Scots pine mesocosms
title_sort water limitation intensity shifts carbon allocation dynamics in scots pine mesocosms
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10533586/
https://www.ncbi.nlm.nih.gov/pubmed/37780069
http://dx.doi.org/10.1007/s11104-023-06093-5
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