Saturating light and not increased carbon dioxide under ocean acidification drives photosynthesis and growth in Ulva rigida (Chlorophyta)
Abstract Carbon physiology of a genetically identified Ulva rigida was investigated under different CO 2(aq) and light levels. The study was designed to answer whether (1) light or exogenous inorganic carbon (Ci) pool is driving growth; and (2) elevated CO 2(aq) concentration under ocean acidificati...
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Online Access: | http://dx.doi.org/10.1002/ece3.1382 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.1382 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.1382 |
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crwiley:10.1002/ece3.1382 2024-10-20T14:11:03+00:00 Saturating light and not increased carbon dioxide under ocean acidification drives photosynthesis and growth in Ulva rigida (Chlorophyta) Rautenberger, Ralf Fernández, Pamela A. Strittmatter, Martina Heesch, Svenja Cornwall, Christopher E. Hurd, Catriona L. Roleda, Michael Y. Deutsche Forschungsgemeinschaft Beaufort Marine Research Award Bioforsk Norwegian Institute for Agricultural and Environmental Research Royal Society of New Zealand Marsden Fund 2015 http://dx.doi.org/10.1002/ece3.1382 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.1382 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.1382 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Ecology and Evolution volume 5, issue 4, page 874-888 ISSN 2045-7758 2045-7758 journal-article 2015 crwiley https://doi.org/10.1002/ece3.1382 2024-09-23T04:35:31Z Abstract Carbon physiology of a genetically identified Ulva rigida was investigated under different CO 2(aq) and light levels. The study was designed to answer whether (1) light or exogenous inorganic carbon (Ci) pool is driving growth; and (2) elevated CO 2(aq) concentration under ocean acidification ( OA ) will downregulate CA ext ‐mediated dehydration and alter the stable carbon isotope ( δ 13 C) signatures toward more CO 2 use to support higher growth rate. At pH T 9.0 where CO 2(aq) is <1 μ mol L −1 , inhibition of the known use mechanisms, that is, direct uptake through the AE port and CA ext ‐mediated dehydration decreased net photosynthesis ( NPS ) by only 56–83%, leaving the carbon uptake mechanism for the remaining 17–44% of the NPS unaccounted. An in silico search for carbon‐concentrating mechanism elements in expressed sequence tag libraries of Ulva found putative light‐dependent transporters to which the remaining NPS can be attributed. The shift in δ 13 C signatures from –22‰ toward –10‰ under saturating light but not under elevated CO 2(aq) suggest preference and substantial use to support photosynthesis and growth. U. rigida is Ci saturated, and growth was primarily controlled by light. Therefore, increased levels of CO 2(aq) predicted for the future will not, in isolation, stimulate Ulva blooms. Article in Journal/Newspaper Ocean acidification Wiley Online Library Ecology and Evolution 5 4 874 888 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Carbon physiology of a genetically identified Ulva rigida was investigated under different CO 2(aq) and light levels. The study was designed to answer whether (1) light or exogenous inorganic carbon (Ci) pool is driving growth; and (2) elevated CO 2(aq) concentration under ocean acidification ( OA ) will downregulate CA ext ‐mediated dehydration and alter the stable carbon isotope ( δ 13 C) signatures toward more CO 2 use to support higher growth rate. At pH T 9.0 where CO 2(aq) is <1 μ mol L −1 , inhibition of the known use mechanisms, that is, direct uptake through the AE port and CA ext ‐mediated dehydration decreased net photosynthesis ( NPS ) by only 56–83%, leaving the carbon uptake mechanism for the remaining 17–44% of the NPS unaccounted. An in silico search for carbon‐concentrating mechanism elements in expressed sequence tag libraries of Ulva found putative light‐dependent transporters to which the remaining NPS can be attributed. The shift in δ 13 C signatures from –22‰ toward –10‰ under saturating light but not under elevated CO 2(aq) suggest preference and substantial use to support photosynthesis and growth. U. rigida is Ci saturated, and growth was primarily controlled by light. Therefore, increased levels of CO 2(aq) predicted for the future will not, in isolation, stimulate Ulva blooms. |
author2 |
Deutsche Forschungsgemeinschaft Beaufort Marine Research Award Bioforsk Norwegian Institute for Agricultural and Environmental Research Royal Society of New Zealand Marsden Fund |
format |
Article in Journal/Newspaper |
author |
Rautenberger, Ralf Fernández, Pamela A. Strittmatter, Martina Heesch, Svenja Cornwall, Christopher E. Hurd, Catriona L. Roleda, Michael Y. |
spellingShingle |
Rautenberger, Ralf Fernández, Pamela A. Strittmatter, Martina Heesch, Svenja Cornwall, Christopher E. Hurd, Catriona L. Roleda, Michael Y. Saturating light and not increased carbon dioxide under ocean acidification drives photosynthesis and growth in Ulva rigida (Chlorophyta) |
author_facet |
Rautenberger, Ralf Fernández, Pamela A. Strittmatter, Martina Heesch, Svenja Cornwall, Christopher E. Hurd, Catriona L. Roleda, Michael Y. |
author_sort |
Rautenberger, Ralf |
title |
Saturating light and not increased carbon dioxide under ocean acidification drives photosynthesis and growth in Ulva rigida (Chlorophyta) |
title_short |
Saturating light and not increased carbon dioxide under ocean acidification drives photosynthesis and growth in Ulva rigida (Chlorophyta) |
title_full |
Saturating light and not increased carbon dioxide under ocean acidification drives photosynthesis and growth in Ulva rigida (Chlorophyta) |
title_fullStr |
Saturating light and not increased carbon dioxide under ocean acidification drives photosynthesis and growth in Ulva rigida (Chlorophyta) |
title_full_unstemmed |
Saturating light and not increased carbon dioxide under ocean acidification drives photosynthesis and growth in Ulva rigida (Chlorophyta) |
title_sort |
saturating light and not increased carbon dioxide under ocean acidification drives photosynthesis and growth in ulva rigida (chlorophyta) |
publisher |
Wiley |
publishDate |
2015 |
url |
http://dx.doi.org/10.1002/ece3.1382 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.1382 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.1382 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Ecology and Evolution volume 5, issue 4, page 874-888 ISSN 2045-7758 2045-7758 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/ece3.1382 |
container_title |
Ecology and Evolution |
container_volume |
5 |
container_issue |
4 |
container_start_page |
874 |
op_container_end_page |
888 |
_version_ |
1813451190149578752 |