Tissue nitrogen status does not alter the physiological responses of Macrocystis pyrifera to ocean acidification
Evaluating the relative effects of local (e.g. eutrophication) and global (e.g. ocean acidification, OA) environmental change is important to predict how marine macroalgae might respond to future oceanic conditions. In this study, the effects of nitrate supply, and hence tissue nitrogen status, and...
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Online Access: | https://eprints.utas.edu.au/40903/ https://doi.org/10.1007/s00227-017-3204-z |
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ftunivtasmania:oai:eprints.utas.edu.au:40903 2023-05-15T17:49:54+02:00 Tissue nitrogen status does not alter the physiological responses of Macrocystis pyrifera to ocean acidification Fernandez, PA Roleda, MY Leal, PP Hepburn, CD Hurd, CL 2017 https://eprints.utas.edu.au/40903/ https://doi.org/10.1007/s00227-017-3204-z unknown Springer-Verlag Fernandez, PA, Roleda, MY, Leal, PP, Hepburn, CD and Hurd, CL orcid:0000-0001-9965-4917 2017 , 'Tissue nitrogen status does not alter the physiological responses of Macrocystis pyrifera to ocean acidification' , Marine Biology, vol. 164 , pp. 1-14 , doi:10.1007/s00227-017-3204-z <http://dx.doi.org/10.1007/s00227-017-3204-z>. seaweed ocean acidification nitrogen metabolism multiple stressor Article PeerReviewed 2017 ftunivtasmania https://doi.org/10.1007/s00227-017-3204-z 2022-01-24T23:18:43Z Evaluating the relative effects of local (e.g. eutrophication) and global (e.g. ocean acidification, OA) environmental change is important to predict how marine macroalgae might respond to future oceanic conditions. In this study, the effects of nitrate supply, and hence tissue nitrogen status, and OA on the N metabolism, growth and photosynthetic rates of the kelp Macrocystis pyrifera were examined. We hypothesized that (1) NO3− uptake and assimilation processes will depend on nitrate supply and (2) tissue N status modulates the physiological response of Macrocystis to OA. Macrocystis blades were grown for 3 days under replete or deplete NO3− concentrations. Thereafter, the NO3− replete and deplete blades were grown for 3 days under current and future pCO2/pH conditions, with NO3− enriched SW. After the initial pre-experimental incubation, total tissue N content, nitrate reductase (NR) activity and internal NO3− pools were reduced under low [NO3−], while NO3− uptake rates increased. Initial tissue N status did not modulate the physiological response to OA. However, NO3− uptake rates and NR activity were enhanced under the OA treatment regardless of the initial tissue N status, suggesting that increases in [H+]/reduced pH might play a regulating role in the N metabolism of this species. Article in Journal/Newspaper Ocean acidification University of Tasmania: UTas ePrints Marine Biology 164 9 |
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Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
unknown |
topic |
seaweed ocean acidification nitrogen metabolism multiple stressor |
spellingShingle |
seaweed ocean acidification nitrogen metabolism multiple stressor Fernandez, PA Roleda, MY Leal, PP Hepburn, CD Hurd, CL Tissue nitrogen status does not alter the physiological responses of Macrocystis pyrifera to ocean acidification |
topic_facet |
seaweed ocean acidification nitrogen metabolism multiple stressor |
description |
Evaluating the relative effects of local (e.g. eutrophication) and global (e.g. ocean acidification, OA) environmental change is important to predict how marine macroalgae might respond to future oceanic conditions. In this study, the effects of nitrate supply, and hence tissue nitrogen status, and OA on the N metabolism, growth and photosynthetic rates of the kelp Macrocystis pyrifera were examined. We hypothesized that (1) NO3− uptake and assimilation processes will depend on nitrate supply and (2) tissue N status modulates the physiological response of Macrocystis to OA. Macrocystis blades were grown for 3 days under replete or deplete NO3− concentrations. Thereafter, the NO3− replete and deplete blades were grown for 3 days under current and future pCO2/pH conditions, with NO3− enriched SW. After the initial pre-experimental incubation, total tissue N content, nitrate reductase (NR) activity and internal NO3− pools were reduced under low [NO3−], while NO3− uptake rates increased. Initial tissue N status did not modulate the physiological response to OA. However, NO3− uptake rates and NR activity were enhanced under the OA treatment regardless of the initial tissue N status, suggesting that increases in [H+]/reduced pH might play a regulating role in the N metabolism of this species. |
format |
Article in Journal/Newspaper |
author |
Fernandez, PA Roleda, MY Leal, PP Hepburn, CD Hurd, CL |
author_facet |
Fernandez, PA Roleda, MY Leal, PP Hepburn, CD Hurd, CL |
author_sort |
Fernandez, PA |
title |
Tissue nitrogen status does not alter the physiological responses of Macrocystis pyrifera to ocean acidification |
title_short |
Tissue nitrogen status does not alter the physiological responses of Macrocystis pyrifera to ocean acidification |
title_full |
Tissue nitrogen status does not alter the physiological responses of Macrocystis pyrifera to ocean acidification |
title_fullStr |
Tissue nitrogen status does not alter the physiological responses of Macrocystis pyrifera to ocean acidification |
title_full_unstemmed |
Tissue nitrogen status does not alter the physiological responses of Macrocystis pyrifera to ocean acidification |
title_sort |
tissue nitrogen status does not alter the physiological responses of macrocystis pyrifera to ocean acidification |
publisher |
Springer-Verlag |
publishDate |
2017 |
url |
https://eprints.utas.edu.au/40903/ https://doi.org/10.1007/s00227-017-3204-z |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
Fernandez, PA, Roleda, MY, Leal, PP, Hepburn, CD and Hurd, CL orcid:0000-0001-9965-4917 2017 , 'Tissue nitrogen status does not alter the physiological responses of Macrocystis pyrifera to ocean acidification' , Marine Biology, vol. 164 , pp. 1-14 , doi:10.1007/s00227-017-3204-z <http://dx.doi.org/10.1007/s00227-017-3204-z>. |
op_doi |
https://doi.org/10.1007/s00227-017-3204-z |
container_title |
Marine Biology |
container_volume |
164 |
container_issue |
9 |
_version_ |
1766156418638938112 |