Diurnal patterns of gas-exchange and metabolic pools in tundra plants during three phases of the arctic growing season
Arctic tundra plant communities are subject to a short growing season that is the primary period in which carbon is sequestered for growth and survival. This period is often characterized by 24-h photoperiods for several months a year. To compensate for the short growing season tundra plants may ext...
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Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3586647 http://www.ncbi.nlm.nih.gov/pubmed/23467719 https://doi.org/10.1002/ece3.467 |
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ftpubmed:oai:pubmedcentral.nih.gov:3586647 2023-05-15T14:51:43+02:00 Diurnal patterns of gas-exchange and metabolic pools in tundra plants during three phases of the arctic growing season Patankar, Rajit Mortazavi, Behzad Oberbauer, Steven F Starr, Gregory 2013-02 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3586647 http://www.ncbi.nlm.nih.gov/pubmed/23467719 https://doi.org/10.1002/ece3.467 en eng Blackwell Publishing Ltd http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3586647 http://www.ncbi.nlm.nih.gov/pubmed/23467719 http://dx.doi.org/10.1002/ece3.467 © 2013 Published by Blackwell Publishing Ltd. http://creativecommons.org/licenses/by/2.5/ Re-use of this article is permitted in accordance with the Creative Commons Deed, Attribution 2.5, which does not permit commercial exploitation. CC-BY Original Research Text 2013 ftpubmed https://doi.org/10.1002/ece3.467 2013-09-04T20:34:23Z Arctic tundra plant communities are subject to a short growing season that is the primary period in which carbon is sequestered for growth and survival. This period is often characterized by 24-h photoperiods for several months a year. To compensate for the short growing season tundra plants may extend their carbon uptake capacity on a diurnal basis, but whether this is true remains unknown. Here, we examined in situ diurnal patterns of physiological activity and foliar metabolites during the early, mid, and late growing season in seven arctic species under light-saturated conditions. We found clear diurnal patterns in photosynthesis and respiration, with midday peaks and midnight lulls indicative of circadian regulation. Diurnal patterns in foliar metabolite concentrations were less distinct between the species and across seasons, suggesting that metabolic pools are likely governed by proximate external factors. This understanding of diurnal physiology will also enhance the parameterization of process-based models, which will aid in better predicting future carbon dynamics for the tundra. This becomes even more critical considering the rapid changes that are occurring circumpolarly that are altering plant community structure, function, and ultimately regional and global carbon budgets. Text Arctic Tundra PubMed Central (PMC) Arctic Ecology and Evolution 3 2 375 388 |
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English |
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Original Research |
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Original Research Patankar, Rajit Mortazavi, Behzad Oberbauer, Steven F Starr, Gregory Diurnal patterns of gas-exchange and metabolic pools in tundra plants during three phases of the arctic growing season |
topic_facet |
Original Research |
description |
Arctic tundra plant communities are subject to a short growing season that is the primary period in which carbon is sequestered for growth and survival. This period is often characterized by 24-h photoperiods for several months a year. To compensate for the short growing season tundra plants may extend their carbon uptake capacity on a diurnal basis, but whether this is true remains unknown. Here, we examined in situ diurnal patterns of physiological activity and foliar metabolites during the early, mid, and late growing season in seven arctic species under light-saturated conditions. We found clear diurnal patterns in photosynthesis and respiration, with midday peaks and midnight lulls indicative of circadian regulation. Diurnal patterns in foliar metabolite concentrations were less distinct between the species and across seasons, suggesting that metabolic pools are likely governed by proximate external factors. This understanding of diurnal physiology will also enhance the parameterization of process-based models, which will aid in better predicting future carbon dynamics for the tundra. This becomes even more critical considering the rapid changes that are occurring circumpolarly that are altering plant community structure, function, and ultimately regional and global carbon budgets. |
format |
Text |
author |
Patankar, Rajit Mortazavi, Behzad Oberbauer, Steven F Starr, Gregory |
author_facet |
Patankar, Rajit Mortazavi, Behzad Oberbauer, Steven F Starr, Gregory |
author_sort |
Patankar, Rajit |
title |
Diurnal patterns of gas-exchange and metabolic pools in tundra plants during three phases of the arctic growing season |
title_short |
Diurnal patterns of gas-exchange and metabolic pools in tundra plants during three phases of the arctic growing season |
title_full |
Diurnal patterns of gas-exchange and metabolic pools in tundra plants during three phases of the arctic growing season |
title_fullStr |
Diurnal patterns of gas-exchange and metabolic pools in tundra plants during three phases of the arctic growing season |
title_full_unstemmed |
Diurnal patterns of gas-exchange and metabolic pools in tundra plants during three phases of the arctic growing season |
title_sort |
diurnal patterns of gas-exchange and metabolic pools in tundra plants during three phases of the arctic growing season |
publisher |
Blackwell Publishing Ltd |
publishDate |
2013 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3586647 http://www.ncbi.nlm.nih.gov/pubmed/23467719 https://doi.org/10.1002/ece3.467 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Tundra |
genre_facet |
Arctic Tundra |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3586647 http://www.ncbi.nlm.nih.gov/pubmed/23467719 http://dx.doi.org/10.1002/ece3.467 |
op_rights |
© 2013 Published by Blackwell Publishing Ltd. http://creativecommons.org/licenses/by/2.5/ Re-use of this article is permitted in accordance with the Creative Commons Deed, Attribution 2.5, which does not permit commercial exploitation. |
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CC-BY |
op_doi |
https://doi.org/10.1002/ece3.467 |
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Ecology and Evolution |
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3 |
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2 |
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375 |
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388 |
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1766322833727684608 |