In situ seasonal patterns of root auxin concentrations and meristem length in an arctic sedge
Summary Seasonal dynamics of root growth play an important role in large‐scale ecosystem processes; they are largely governed by growth regulatory compounds and influenced by environmental conditions. Yet, our knowledge about physiological drivers of root growth is mostly limited to laboratory‐based...
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Online Access: | http://dx.doi.org/10.1111/nph.19616 https://nph.onlinelibrary.wiley.com/doi/pdf/10.1111/nph.19616 |
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crwiley:10.1111/nph.19616 2024-06-23T07:50:33+00:00 In situ seasonal patterns of root auxin concentrations and meristem length in an arctic sedge Blume‐Werry, Gesche Semenchuk, Philipp Ljung, Karin Milbau, Ann Novak, Ondrej Olofsson, Johan Brunoni, Federica Knut och Alice Wallenbergs Stiftelse Vetenskapsrådet Kempestiftelserna 2024 http://dx.doi.org/10.1111/nph.19616 https://nph.onlinelibrary.wiley.com/doi/pdf/10.1111/nph.19616 en eng Wiley http://creativecommons.org/licenses/by/4.0/ New Phytologist volume 242, issue 3, page 988-999 ISSN 0028-646X 1469-8137 journal-article 2024 crwiley https://doi.org/10.1111/nph.19616 2024-06-13T04:24:09Z Summary Seasonal dynamics of root growth play an important role in large‐scale ecosystem processes; they are largely governed by growth regulatory compounds and influenced by environmental conditions. Yet, our knowledge about physiological drivers of root growth is mostly limited to laboratory‐based studies on model plant species. We sampled root tips of Eriophorum vaginatum and analyzed their auxin concentrations and meristem lengths biweekly over a growing season in situ in a subarctic peatland, both in surface soil and at the permafrost thawfront. Auxin concentrations were almost five times higher in surface than in thawfront soils and increased over the season, especially at the thawfront. Surprisingly, meristem length showed an opposite pattern and was almost double in thawfront compared with surface soils. Meristem length increased from peak to late season in the surface soils but decreased at the thawfront. Our study of in situ seasonal dynamics in root physiological parameters illustrates the potential for physiological methods to be applied in ecological studies and emphasizes the importance of in situ measurements. The strong effect of root location and the unexpected opposite patterns of meristem length and auxin concentrations likely show that auxin actively governs root growth to ensure a high potential for nutrient uptake at the thawfront. Article in Journal/Newspaper Arctic Eriophorum permafrost Subarctic Wiley Online Library Arctic New Phytologist 242 3 988 999 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Summary Seasonal dynamics of root growth play an important role in large‐scale ecosystem processes; they are largely governed by growth regulatory compounds and influenced by environmental conditions. Yet, our knowledge about physiological drivers of root growth is mostly limited to laboratory‐based studies on model plant species. We sampled root tips of Eriophorum vaginatum and analyzed their auxin concentrations and meristem lengths biweekly over a growing season in situ in a subarctic peatland, both in surface soil and at the permafrost thawfront. Auxin concentrations were almost five times higher in surface than in thawfront soils and increased over the season, especially at the thawfront. Surprisingly, meristem length showed an opposite pattern and was almost double in thawfront compared with surface soils. Meristem length increased from peak to late season in the surface soils but decreased at the thawfront. Our study of in situ seasonal dynamics in root physiological parameters illustrates the potential for physiological methods to be applied in ecological studies and emphasizes the importance of in situ measurements. The strong effect of root location and the unexpected opposite patterns of meristem length and auxin concentrations likely show that auxin actively governs root growth to ensure a high potential for nutrient uptake at the thawfront. |
author2 |
Knut och Alice Wallenbergs Stiftelse Vetenskapsrådet Kempestiftelserna |
format |
Article in Journal/Newspaper |
author |
Blume‐Werry, Gesche Semenchuk, Philipp Ljung, Karin Milbau, Ann Novak, Ondrej Olofsson, Johan Brunoni, Federica |
spellingShingle |
Blume‐Werry, Gesche Semenchuk, Philipp Ljung, Karin Milbau, Ann Novak, Ondrej Olofsson, Johan Brunoni, Federica In situ seasonal patterns of root auxin concentrations and meristem length in an arctic sedge |
author_facet |
Blume‐Werry, Gesche Semenchuk, Philipp Ljung, Karin Milbau, Ann Novak, Ondrej Olofsson, Johan Brunoni, Federica |
author_sort |
Blume‐Werry, Gesche |
title |
In situ seasonal patterns of root auxin concentrations and meristem length in an arctic sedge |
title_short |
In situ seasonal patterns of root auxin concentrations and meristem length in an arctic sedge |
title_full |
In situ seasonal patterns of root auxin concentrations and meristem length in an arctic sedge |
title_fullStr |
In situ seasonal patterns of root auxin concentrations and meristem length in an arctic sedge |
title_full_unstemmed |
In situ seasonal patterns of root auxin concentrations and meristem length in an arctic sedge |
title_sort |
in situ seasonal patterns of root auxin concentrations and meristem length in an arctic sedge |
publisher |
Wiley |
publishDate |
2024 |
url |
http://dx.doi.org/10.1111/nph.19616 https://nph.onlinelibrary.wiley.com/doi/pdf/10.1111/nph.19616 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Eriophorum permafrost Subarctic |
genre_facet |
Arctic Eriophorum permafrost Subarctic |
op_source |
New Phytologist volume 242, issue 3, page 988-999 ISSN 0028-646X 1469-8137 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/nph.19616 |
container_title |
New Phytologist |
container_volume |
242 |
container_issue |
3 |
container_start_page |
988 |
op_container_end_page |
999 |
_version_ |
1802641461506736128 |