Respiratory flexibility and efficiency are affected by simulated global change in Arctic plants
Summary Laboratory studies indicate that, in response to environmental conditions, plants modulate respiratory electron partitioning between the ‘energy‐wasteful’ alternative pathway ( AP ) and the ‘energy‐conserving’ cytochrome pathway ( CP ). Field data, however, are scarce. Here we investigate ho...
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crwiley:10.1111/nph.12083 2024-06-23T07:50:05+00:00 Respiratory flexibility and efficiency are affected by simulated global change in Arctic plants Kornfeld, Ari Heskel, Mary Atkin, Owen K. Gough, Laura Griffin, Kevin L. Horton, Travis W. Turnbull, Matthew H. 2012 http://dx.doi.org/10.1111/nph.12083 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fnph.12083 https://onlinelibrary.wiley.com/doi/pdf/10.1111/nph.12083 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/nph.12083 https://nph.onlinelibrary.wiley.com/doi/pdf/10.1111/nph.12083 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor http://doi.wiley.com/10.1002/tdm_license_1.1 New Phytologist volume 197, issue 4, page 1161-1172 ISSN 0028-646X 1469-8137 journal-article 2012 crwiley https://doi.org/10.1111/nph.12083 2024-06-04T06:31:34Z Summary Laboratory studies indicate that, in response to environmental conditions, plants modulate respiratory electron partitioning between the ‘energy‐wasteful’ alternative pathway ( AP ) and the ‘energy‐conserving’ cytochrome pathway ( CP ). Field data, however, are scarce. Here we investigate how 20‐yr field manipulations simulating global change affected electron partitioning in Alaskan Arctic tundra species. We sampled leaves from three dominant tundra species – B etula nana , E riophorum vaginatum and R ubus chamaemorus – that had been strongly affected by manipulations of soil nutrients, light availability, and warming. We measured foliar dark respiration, in‐vivo electron partitioning and alternative oxidase/cytochrome c oxidase concentrations in addition to leaf traits and mitochondrial ultrastructure. Changes in leaf traits and ultrastructure were similar across species. Respiration at 20°C ( R 20 ) was reduced 15% in all three species grown at elevated temperature, suggesting thermal acclimation of respiration. In Betula , the species with the largest growth response to added nutrients, CP activity increased from 9.4 ± 0.8 to 16.6 ± 1.6 nmol O 2 g −1 DM s −1 whereas AP activity was unchanged. The ability of Betula to selectively increase CP activity in response to the environment may contribute to its overall ecological success by increasing respiratory energy efficiency, and thus retaining more carbon for growth. Article in Journal/Newspaper Arctic Tundra Wiley Online Library Arctic New Phytologist 197 4 1161 1172 |
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Wiley Online Library |
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language |
English |
description |
Summary Laboratory studies indicate that, in response to environmental conditions, plants modulate respiratory electron partitioning between the ‘energy‐wasteful’ alternative pathway ( AP ) and the ‘energy‐conserving’ cytochrome pathway ( CP ). Field data, however, are scarce. Here we investigate how 20‐yr field manipulations simulating global change affected electron partitioning in Alaskan Arctic tundra species. We sampled leaves from three dominant tundra species – B etula nana , E riophorum vaginatum and R ubus chamaemorus – that had been strongly affected by manipulations of soil nutrients, light availability, and warming. We measured foliar dark respiration, in‐vivo electron partitioning and alternative oxidase/cytochrome c oxidase concentrations in addition to leaf traits and mitochondrial ultrastructure. Changes in leaf traits and ultrastructure were similar across species. Respiration at 20°C ( R 20 ) was reduced 15% in all three species grown at elevated temperature, suggesting thermal acclimation of respiration. In Betula , the species with the largest growth response to added nutrients, CP activity increased from 9.4 ± 0.8 to 16.6 ± 1.6 nmol O 2 g −1 DM s −1 whereas AP activity was unchanged. The ability of Betula to selectively increase CP activity in response to the environment may contribute to its overall ecological success by increasing respiratory energy efficiency, and thus retaining more carbon for growth. |
format |
Article in Journal/Newspaper |
author |
Kornfeld, Ari Heskel, Mary Atkin, Owen K. Gough, Laura Griffin, Kevin L. Horton, Travis W. Turnbull, Matthew H. |
spellingShingle |
Kornfeld, Ari Heskel, Mary Atkin, Owen K. Gough, Laura Griffin, Kevin L. Horton, Travis W. Turnbull, Matthew H. Respiratory flexibility and efficiency are affected by simulated global change in Arctic plants |
author_facet |
Kornfeld, Ari Heskel, Mary Atkin, Owen K. Gough, Laura Griffin, Kevin L. Horton, Travis W. Turnbull, Matthew H. |
author_sort |
Kornfeld, Ari |
title |
Respiratory flexibility and efficiency are affected by simulated global change in Arctic plants |
title_short |
Respiratory flexibility and efficiency are affected by simulated global change in Arctic plants |
title_full |
Respiratory flexibility and efficiency are affected by simulated global change in Arctic plants |
title_fullStr |
Respiratory flexibility and efficiency are affected by simulated global change in Arctic plants |
title_full_unstemmed |
Respiratory flexibility and efficiency are affected by simulated global change in Arctic plants |
title_sort |
respiratory flexibility and efficiency are affected by simulated global change in arctic plants |
publisher |
Wiley |
publishDate |
2012 |
url |
http://dx.doi.org/10.1111/nph.12083 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fnph.12083 https://onlinelibrary.wiley.com/doi/pdf/10.1111/nph.12083 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/nph.12083 https://nph.onlinelibrary.wiley.com/doi/pdf/10.1111/nph.12083 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Tundra |
genre_facet |
Arctic Tundra |
op_source |
New Phytologist volume 197, issue 4, page 1161-1172 ISSN 0028-646X 1469-8137 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor http://doi.wiley.com/10.1002/tdm_license_1.1 |
op_doi |
https://doi.org/10.1111/nph.12083 |
container_title |
New Phytologist |
container_volume |
197 |
container_issue |
4 |
container_start_page |
1161 |
op_container_end_page |
1172 |
_version_ |
1802640856143888384 |