Heme b in marine phytoplankton and particulate material from the North Atlantic Ocean
Concentrations of heme b, the ironcontaining prosthetic group of many hemoproteins, were measured in 6 species of marine phytoplankton (Dunaliella tertiolecta, Emiliania huxleyi, Thalassio - sira weissflogii, T. oceanica, Phaeodactylum tricor - nutum and Synechococcus sp. WH7803) that were subjected...
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Online Access: | https://oceanrep.geomar.de/id/eprint/23073/ https://oceanrep.geomar.de/id/eprint/23073/1/m483p001.pdf https://doi.org/10.3354/meps10367 |
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ftoceanrep:oai:oceanrep.geomar.de:23073 2023-05-15T17:28:24+02:00 Heme b in marine phytoplankton and particulate material from the North Atlantic Ocean Honey, DJ Gledhill, Martha Bibby, TS Legiret, FE Pratt, NJ Hickman, AE Lawson, T Achterberg, Eric P. 2013 text https://oceanrep.geomar.de/id/eprint/23073/ https://oceanrep.geomar.de/id/eprint/23073/1/m483p001.pdf https://doi.org/10.3354/meps10367 en eng Inter Research https://oceanrep.geomar.de/id/eprint/23073/1/m483p001.pdf Honey, D., Gledhill, M. , Bibby, T., Legiret, F., Pratt, N., Hickman, A., Lawson, T. and Achterberg, E. P. (2013) Heme b in marine phytoplankton and particulate material from the North Atlantic Ocean. Open Access Marine Ecology Progress Series, 483 . pp. 1-17. DOI 10.3354/meps10367 <https://doi.org/10.3354/meps10367>. doi:10.3354/meps10367 info:eu-repo/semantics/openAccess Article PeerReviewed 2013 ftoceanrep https://doi.org/10.3354/meps10367 2023-04-07T15:11:48Z Concentrations of heme b, the ironcontaining prosthetic group of many hemoproteins, were measured in 6 species of marine phytoplankton (Dunaliella tertiolecta, Emiliania huxleyi, Thalassio - sira weissflogii, T. oceanica, Phaeodactylum tricor - nutum and Synechococcus sp. WH7803) that were subjected to variations in iron concentration. Changes in heme b in response to reduced light and nitrate were also ex amined for E. huxleyi and T. oceanica. Results from laboratory cultures were compared with heme b determined in particulate material in the North Atlantic. In cultures, heme b made up 18 ± 14% (SE) of the total iron pool. Reduced iron and nitrate concentrations resulted in a decreased intracellular heme b concentration, expressed as per mole carbon. Chlorophyll a (chl a) to heme b ratios in E. huxleyi and D. tertiolecta in creased in response to limited light and nutrient availability, but slightly decreased or did not change in the diatoms and the cyanophyte Synechococcus sp. WH7803. The heme b:particulate organic carbon (POC) and chl a:heme b ratios in the North Atlantic were within the range observed in phytoplankton cultures. In the surface mixed layer, decreases in heme b:POC ratios were linked to decreases in nutrient concentrations. Chl a:heme b ratios increased with depth and were thus primarily affected by light availability. Relative relationships between heme b, chl a and POC in the North Atlantic likely represented a change in the ability of cells to undertake cellular processes driven by chl a (light harvesting) and heme b (e.g. electron transport) according to ambient light and nutrient conditions. Article in Journal/Newspaper North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Sira ENVELOPE(8.107,8.107,62.667,62.667) Marine Ecology Progress Series 483 1 17 |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Concentrations of heme b, the ironcontaining prosthetic group of many hemoproteins, were measured in 6 species of marine phytoplankton (Dunaliella tertiolecta, Emiliania huxleyi, Thalassio - sira weissflogii, T. oceanica, Phaeodactylum tricor - nutum and Synechococcus sp. WH7803) that were subjected to variations in iron concentration. Changes in heme b in response to reduced light and nitrate were also ex amined for E. huxleyi and T. oceanica. Results from laboratory cultures were compared with heme b determined in particulate material in the North Atlantic. In cultures, heme b made up 18 ± 14% (SE) of the total iron pool. Reduced iron and nitrate concentrations resulted in a decreased intracellular heme b concentration, expressed as per mole carbon. Chlorophyll a (chl a) to heme b ratios in E. huxleyi and D. tertiolecta in creased in response to limited light and nutrient availability, but slightly decreased or did not change in the diatoms and the cyanophyte Synechococcus sp. WH7803. The heme b:particulate organic carbon (POC) and chl a:heme b ratios in the North Atlantic were within the range observed in phytoplankton cultures. In the surface mixed layer, decreases in heme b:POC ratios were linked to decreases in nutrient concentrations. Chl a:heme b ratios increased with depth and were thus primarily affected by light availability. Relative relationships between heme b, chl a and POC in the North Atlantic likely represented a change in the ability of cells to undertake cellular processes driven by chl a (light harvesting) and heme b (e.g. electron transport) according to ambient light and nutrient conditions. |
format |
Article in Journal/Newspaper |
author |
Honey, DJ Gledhill, Martha Bibby, TS Legiret, FE Pratt, NJ Hickman, AE Lawson, T Achterberg, Eric P. |
spellingShingle |
Honey, DJ Gledhill, Martha Bibby, TS Legiret, FE Pratt, NJ Hickman, AE Lawson, T Achterberg, Eric P. Heme b in marine phytoplankton and particulate material from the North Atlantic Ocean |
author_facet |
Honey, DJ Gledhill, Martha Bibby, TS Legiret, FE Pratt, NJ Hickman, AE Lawson, T Achterberg, Eric P. |
author_sort |
Honey, DJ |
title |
Heme b in marine phytoplankton and particulate material from the North Atlantic Ocean |
title_short |
Heme b in marine phytoplankton and particulate material from the North Atlantic Ocean |
title_full |
Heme b in marine phytoplankton and particulate material from the North Atlantic Ocean |
title_fullStr |
Heme b in marine phytoplankton and particulate material from the North Atlantic Ocean |
title_full_unstemmed |
Heme b in marine phytoplankton and particulate material from the North Atlantic Ocean |
title_sort |
heme b in marine phytoplankton and particulate material from the north atlantic ocean |
publisher |
Inter Research |
publishDate |
2013 |
url |
https://oceanrep.geomar.de/id/eprint/23073/ https://oceanrep.geomar.de/id/eprint/23073/1/m483p001.pdf https://doi.org/10.3354/meps10367 |
long_lat |
ENVELOPE(8.107,8.107,62.667,62.667) |
geographic |
Sira |
geographic_facet |
Sira |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/23073/1/m483p001.pdf Honey, D., Gledhill, M. , Bibby, T., Legiret, F., Pratt, N., Hickman, A., Lawson, T. and Achterberg, E. P. (2013) Heme b in marine phytoplankton and particulate material from the North Atlantic Ocean. Open Access Marine Ecology Progress Series, 483 . pp. 1-17. DOI 10.3354/meps10367 <https://doi.org/10.3354/meps10367>. doi:10.3354/meps10367 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3354/meps10367 |
container_title |
Marine Ecology Progress Series |
container_volume |
483 |
container_start_page |
1 |
op_container_end_page |
17 |
_version_ |
1766121063916240896 |