Ocean acidification alleviates low-temperature effects on growth and photosynthesis of the red alga Neosiphonia harveyi (Rhodophyta)
This study aimed to examine interactive effects between ocean acidification and temperature on the photosynthetic and growth performance of Neosiphonia harveyi. N. harveyi was cultivated at 10 and 17.5 °C at present (~380 µatm), expected future (~800 µatm), and high (~1500 µatm) pCO2. Chlorophyll a...
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Oxford University Press
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Online Access: | https://oceanrep.geomar.de/id/eprint/25313/ https://oceanrep.geomar.de/id/eprint/25313/1/Olischlaeger.pdf https://doi.org/10.1093/jxb/ert329 |
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ftoceanrep:oai:oceanrep.geomar.de:25313 2023-05-15T17:49:47+02:00 Ocean acidification alleviates low-temperature effects on growth and photosynthesis of the red alga Neosiphonia harveyi (Rhodophyta) Olischläger, Mark Wiencke, Christian 2013-12 text https://oceanrep.geomar.de/id/eprint/25313/ https://oceanrep.geomar.de/id/eprint/25313/1/Olischlaeger.pdf https://doi.org/10.1093/jxb/ert329 en eng Oxford University Press https://oceanrep.geomar.de/id/eprint/25313/1/Olischlaeger.pdf Olischläger, M. and Wiencke, C. (2013) Ocean acidification alleviates low-temperature effects on growth and photosynthesis of the red alga Neosiphonia harveyi (Rhodophyta). Open Access Journal of Experimental Botany, 64 (18). pp. 5587-5597. DOI 10.1093/jxb/ert329 <https://doi.org/10.1093/jxb%2Fert329>. doi:10.1093/jxb/ert329 info:eu-repo/semantics/openAccess Article PeerReviewed 2013 ftoceanrep https://doi.org/10.1093/jxb/ert329 2023-04-07T15:13:51Z This study aimed to examine interactive effects between ocean acidification and temperature on the photosynthetic and growth performance of Neosiphonia harveyi. N. harveyi was cultivated at 10 and 17.5 °C at present (~380 µatm), expected future (~800 µatm), and high (~1500 µatm) pCO2. Chlorophyll a fluorescence, net photosynthesis, and growth were measured. The state of the carbon-concentrating mechanism (CCM) was examined by pH-drift experiments (with algae cultivated at 10 °C only) using ethoxyzolamide, an inhibitor of external and internal carbonic anhydrases (exCA and intCA, respectively). Furthermore, the inhibitory effect of acetazolamide (an inhibitor of exCA) and Tris (an inhibitor of the acidification of the diffusive boundary layer) on net photosynthesis was measured at both temperatures. Temperature affected photosynthesis (in terms of photosynthetic efficiency, light saturation point, and net photosynthesis) and growth at present pCO2, but these effects decreased with increasing pCO2. The relevance of the CCM decreased at 10 °C. A pCO2 effect on the CCM could only be shown if intCA and exCA were inhibited. The experiments demonstrate for the first time interactions between ocean acidification and temperature on the performance of a non-calcifying macroalga and show that the effects of low temperature on photosynthesis can be alleviated by increasing pCO2. The findings indicate that the carbon acquisition mediated by exCA and acidification of the diffusive boundary layer decrease at low temperatures but are not affected by the cultivation level of pCO2, whereas the activity of intCA is affected by pCO2. Ecologically, the findings suggest that ocean acidification might affect the biogeographical distribution of N. harveyi. Article in Journal/Newspaper Ocean acidification OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Journal of Experimental Botany 64 18 5587 5597 |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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English |
description |
This study aimed to examine interactive effects between ocean acidification and temperature on the photosynthetic and growth performance of Neosiphonia harveyi. N. harveyi was cultivated at 10 and 17.5 °C at present (~380 µatm), expected future (~800 µatm), and high (~1500 µatm) pCO2. Chlorophyll a fluorescence, net photosynthesis, and growth were measured. The state of the carbon-concentrating mechanism (CCM) was examined by pH-drift experiments (with algae cultivated at 10 °C only) using ethoxyzolamide, an inhibitor of external and internal carbonic anhydrases (exCA and intCA, respectively). Furthermore, the inhibitory effect of acetazolamide (an inhibitor of exCA) and Tris (an inhibitor of the acidification of the diffusive boundary layer) on net photosynthesis was measured at both temperatures. Temperature affected photosynthesis (in terms of photosynthetic efficiency, light saturation point, and net photosynthesis) and growth at present pCO2, but these effects decreased with increasing pCO2. The relevance of the CCM decreased at 10 °C. A pCO2 effect on the CCM could only be shown if intCA and exCA were inhibited. The experiments demonstrate for the first time interactions between ocean acidification and temperature on the performance of a non-calcifying macroalga and show that the effects of low temperature on photosynthesis can be alleviated by increasing pCO2. The findings indicate that the carbon acquisition mediated by exCA and acidification of the diffusive boundary layer decrease at low temperatures but are not affected by the cultivation level of pCO2, whereas the activity of intCA is affected by pCO2. Ecologically, the findings suggest that ocean acidification might affect the biogeographical distribution of N. harveyi. |
format |
Article in Journal/Newspaper |
author |
Olischläger, Mark Wiencke, Christian |
spellingShingle |
Olischläger, Mark Wiencke, Christian Ocean acidification alleviates low-temperature effects on growth and photosynthesis of the red alga Neosiphonia harveyi (Rhodophyta) |
author_facet |
Olischläger, Mark Wiencke, Christian |
author_sort |
Olischläger, Mark |
title |
Ocean acidification alleviates low-temperature effects on growth and photosynthesis of the red alga Neosiphonia harveyi (Rhodophyta) |
title_short |
Ocean acidification alleviates low-temperature effects on growth and photosynthesis of the red alga Neosiphonia harveyi (Rhodophyta) |
title_full |
Ocean acidification alleviates low-temperature effects on growth and photosynthesis of the red alga Neosiphonia harveyi (Rhodophyta) |
title_fullStr |
Ocean acidification alleviates low-temperature effects on growth and photosynthesis of the red alga Neosiphonia harveyi (Rhodophyta) |
title_full_unstemmed |
Ocean acidification alleviates low-temperature effects on growth and photosynthesis of the red alga Neosiphonia harveyi (Rhodophyta) |
title_sort |
ocean acidification alleviates low-temperature effects on growth and photosynthesis of the red alga neosiphonia harveyi (rhodophyta) |
publisher |
Oxford University Press |
publishDate |
2013 |
url |
https://oceanrep.geomar.de/id/eprint/25313/ https://oceanrep.geomar.de/id/eprint/25313/1/Olischlaeger.pdf https://doi.org/10.1093/jxb/ert329 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
https://oceanrep.geomar.de/id/eprint/25313/1/Olischlaeger.pdf Olischläger, M. and Wiencke, C. (2013) Ocean acidification alleviates low-temperature effects on growth and photosynthesis of the red alga Neosiphonia harveyi (Rhodophyta). Open Access Journal of Experimental Botany, 64 (18). pp. 5587-5597. DOI 10.1093/jxb/ert329 <https://doi.org/10.1093/jxb%2Fert329>. doi:10.1093/jxb/ert329 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1093/jxb/ert329 |
container_title |
Journal of Experimental Botany |
container_volume |
64 |
container_issue |
18 |
container_start_page |
5587 |
op_container_end_page |
5597 |
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1766156257278820352 |