Response of Nodularia spumigena to pCO2 - Part 3: Turnover of phosphorus compounds
Diazotrophic cyanobacteria often form extensive summer blooms in the Baltic Sea driving their environment into phosphate limitation. One of the main species is the heterocystous cyanobacterium Nodularia spumigena. N. spumigena exhibits accelerated uptake of phosphate through the release of the exoen...
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Copernicus Publications (EGU)
2013
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Online Access: | https://oceanrep.geomar.de/id/eprint/19260/ https://oceanrep.geomar.de/id/eprint/19260/9/bg-10-1483-2013.pdf https://oceanrep.geomar.de/id/eprint/19260/10/bg-10-1483-2013-supplement.pdf https://doi.org/10.5194/bgd-9-14709-2012 https://doi.org/10.5194/bg-10-1483-2013 |
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ftoceanrep:oai:oceanrep.geomar.de:19260 2023-05-15T17:51:48+02:00 Response of Nodularia spumigena to pCO2 - Part 3: Turnover of phosphorus compounds Unger, J. Endres, Sonja Wannicke, N. Engel, Anja Voss, M. Nausch, G. Nausch, M. 2013 text https://oceanrep.geomar.de/id/eprint/19260/ https://oceanrep.geomar.de/id/eprint/19260/9/bg-10-1483-2013.pdf https://oceanrep.geomar.de/id/eprint/19260/10/bg-10-1483-2013-supplement.pdf https://doi.org/10.5194/bgd-9-14709-2012 https://doi.org/10.5194/bg-10-1483-2013 en eng Copernicus Publications (EGU) https://oceanrep.geomar.de/id/eprint/19260/9/bg-10-1483-2013.pdf https://oceanrep.geomar.de/id/eprint/19260/10/bg-10-1483-2013-supplement.pdf Unger, J., Endres, S. , Wannicke, N., Engel, A. , Voss, M., Nausch, G. and Nausch, M. (2013) Response of Nodularia spumigena to pCO2 - Part 3: Turnover of phosphorus compounds. Open Access Biogeosciences (BG), 10 . pp. 1483-1499. DOI 10.5194/bg-10-1483-2013 <https://doi.org/10.5194/bg-10-1483-2013>. doi:10.5194/bg-10-1483-2013 cc_by info:eu-repo/semantics/openAccess Article PeerReviewed 2013 ftoceanrep https://doi.org/10.5194/bgd-9-14709-201210.5194/bg-10-1483-2013 2023-04-07T15:06:13Z Diazotrophic cyanobacteria often form extensive summer blooms in the Baltic Sea driving their environment into phosphate limitation. One of the main species is the heterocystous cyanobacterium Nodularia spumigena. N. spumigena exhibits accelerated uptake of phosphate through the release of the exoenzyme alkaline phosphatase that also serves as an indicator of the hydrolysis of dissolved organic phosphorus (DOP). The present study investigated the utilization of DOP and its compounds (e.g. ATP) by N. spumigena during growth under varying CO2 concentrations, in order to estimate potential consequences of ocean acidification on the cell's supply with phosphorus. Cell growth, phosphorus pool fractions, and four DOP-compounds (ATP, DNA, RNA, and phospholipids) were determined in three set-ups with different CO2 concentrations (341, 399, and 508 μatm) during a 15-day batch experiment. The results showed rapid depletion of dissolved inorganic phosphorus (DIP) in all pCO2 treatments while DOP utilization increased with elevated pCO2, in parallel with the growth stimulation of N. spumigena. During the growth phase, DOP uptake was enhanced by a factor of 1.32 at 399 μatm and of 2.25 at 508 μatm compared to the lowest pCO2 concentration. Among the measured DOP compounds, none was found to accumulate preferentially during the incubation or in response to a specific pCO2 treatment. However, at the beginning 61.9 ± 4.3% of the DOP were not characterized but comprised the most highly utilized fraction. This is demonstrated by the decrement of this fraction to 27.4 ± 9.9% of total DOP during the growth phase, especially in response to the medium and high pCO2 treatment. Our results indicate a stimulated growth of diazotrophic cyanobacteria at increasing CO2 concentrations that is accompanied by increasing utilization of DOP as an alternative P source. Article in Journal/Newspaper Ocean acidification OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Diazotrophic cyanobacteria often form extensive summer blooms in the Baltic Sea driving their environment into phosphate limitation. One of the main species is the heterocystous cyanobacterium Nodularia spumigena. N. spumigena exhibits accelerated uptake of phosphate through the release of the exoenzyme alkaline phosphatase that also serves as an indicator of the hydrolysis of dissolved organic phosphorus (DOP). The present study investigated the utilization of DOP and its compounds (e.g. ATP) by N. spumigena during growth under varying CO2 concentrations, in order to estimate potential consequences of ocean acidification on the cell's supply with phosphorus. Cell growth, phosphorus pool fractions, and four DOP-compounds (ATP, DNA, RNA, and phospholipids) were determined in three set-ups with different CO2 concentrations (341, 399, and 508 μatm) during a 15-day batch experiment. The results showed rapid depletion of dissolved inorganic phosphorus (DIP) in all pCO2 treatments while DOP utilization increased with elevated pCO2, in parallel with the growth stimulation of N. spumigena. During the growth phase, DOP uptake was enhanced by a factor of 1.32 at 399 μatm and of 2.25 at 508 μatm compared to the lowest pCO2 concentration. Among the measured DOP compounds, none was found to accumulate preferentially during the incubation or in response to a specific pCO2 treatment. However, at the beginning 61.9 ± 4.3% of the DOP were not characterized but comprised the most highly utilized fraction. This is demonstrated by the decrement of this fraction to 27.4 ± 9.9% of total DOP during the growth phase, especially in response to the medium and high pCO2 treatment. Our results indicate a stimulated growth of diazotrophic cyanobacteria at increasing CO2 concentrations that is accompanied by increasing utilization of DOP as an alternative P source. |
format |
Article in Journal/Newspaper |
author |
Unger, J. Endres, Sonja Wannicke, N. Engel, Anja Voss, M. Nausch, G. Nausch, M. |
spellingShingle |
Unger, J. Endres, Sonja Wannicke, N. Engel, Anja Voss, M. Nausch, G. Nausch, M. Response of Nodularia spumigena to pCO2 - Part 3: Turnover of phosphorus compounds |
author_facet |
Unger, J. Endres, Sonja Wannicke, N. Engel, Anja Voss, M. Nausch, G. Nausch, M. |
author_sort |
Unger, J. |
title |
Response of Nodularia spumigena to pCO2 - Part 3: Turnover of phosphorus compounds |
title_short |
Response of Nodularia spumigena to pCO2 - Part 3: Turnover of phosphorus compounds |
title_full |
Response of Nodularia spumigena to pCO2 - Part 3: Turnover of phosphorus compounds |
title_fullStr |
Response of Nodularia spumigena to pCO2 - Part 3: Turnover of phosphorus compounds |
title_full_unstemmed |
Response of Nodularia spumigena to pCO2 - Part 3: Turnover of phosphorus compounds |
title_sort |
response of nodularia spumigena to pco2 - part 3: turnover of phosphorus compounds |
publisher |
Copernicus Publications (EGU) |
publishDate |
2013 |
url |
https://oceanrep.geomar.de/id/eprint/19260/ https://oceanrep.geomar.de/id/eprint/19260/9/bg-10-1483-2013.pdf https://oceanrep.geomar.de/id/eprint/19260/10/bg-10-1483-2013-supplement.pdf https://doi.org/10.5194/bgd-9-14709-2012 https://doi.org/10.5194/bg-10-1483-2013 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
https://oceanrep.geomar.de/id/eprint/19260/9/bg-10-1483-2013.pdf https://oceanrep.geomar.de/id/eprint/19260/10/bg-10-1483-2013-supplement.pdf Unger, J., Endres, S. , Wannicke, N., Engel, A. , Voss, M., Nausch, G. and Nausch, M. (2013) Response of Nodularia spumigena to pCO2 - Part 3: Turnover of phosphorus compounds. Open Access Biogeosciences (BG), 10 . pp. 1483-1499. DOI 10.5194/bg-10-1483-2013 <https://doi.org/10.5194/bg-10-1483-2013>. doi:10.5194/bg-10-1483-2013 |
op_rights |
cc_by info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bgd-9-14709-201210.5194/bg-10-1483-2013 |
_version_ |
1766159053242761216 |