Copper requirements for iron acquisition and growth of coastal and oceanic diatoms
Centric diatoms isolated from open ocean environments require higher concentrations of Cu for growth than their coastal counterparts. In artificial seawater medium containing,1 nmol L21 Cu, three coastal species maintained near maximum rates of growth, but the oceanic clones were unable to survive....
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.540.9010 2023-05-15T15:43:52+02:00 Copper requirements for iron acquisition and growth of coastal and oceanic diatoms Graham Peers Sarah-ann Quesnel Neil M. Price The Pennsylvania State University CiteSeerX Archives 2005 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.540.9010 http://www.aslo.org/lo/toc/vol_50/issue_4/1149.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.540.9010 http://www.aslo.org/lo/toc/vol_50/issue_4/1149.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.aslo.org/lo/toc/vol_50/issue_4/1149.pdf text 2005 ftciteseerx 2016-01-08T11:03:59Z Centric diatoms isolated from open ocean environments require higher concentrations of Cu for growth than their coastal counterparts. In artificial seawater medium containing,1 nmol L21 Cu, three coastal species maintained near maximum rates of growth, but the oceanic clones were unable to survive. Copper limitation was more severe in the diatoms grown in low- than in high-Fe seawater, suggesting that Cu and Fe were interacting essential resources. The interactive effect was in part the result of a Cu requirement for Fe transport. Thalassiosira weissflogii and Thalassiosira oceanica had lower Fe quotas and slower rates of Fe uptake when [Cu] was reduced in the medium. Brief exposure of Cu-limited cells to 10 nmol L21 Cu increased the instantaneous Fe uptake rate by 1.5 times in T. oceanica. Steady-state uptake rates of both species at high, growth-saturating concentrations of Fe were also Cu dependent. Oceanic species appeared to have an additional Cu requirement that was independent of Fe acquisition and likely responsible for their higher requirements compared to coastal species. Evidence for the importance of Cu in natural communities of phytoplankton was obtained from an incubation experiment performed in the Fe-limited basin of the Bering Sea. Addition of 2 nmol L21 Cu doubled the phytoplankton net growth rate compared to the untreated controls and, in the presence of extra Fe, increased the growth rate compared to the samples amended with Fe alone. The results suggest that Cu may be an important micronutrient for phytoplankton Text Bering Sea Unknown Bering Sea |
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Centric diatoms isolated from open ocean environments require higher concentrations of Cu for growth than their coastal counterparts. In artificial seawater medium containing,1 nmol L21 Cu, three coastal species maintained near maximum rates of growth, but the oceanic clones were unable to survive. Copper limitation was more severe in the diatoms grown in low- than in high-Fe seawater, suggesting that Cu and Fe were interacting essential resources. The interactive effect was in part the result of a Cu requirement for Fe transport. Thalassiosira weissflogii and Thalassiosira oceanica had lower Fe quotas and slower rates of Fe uptake when [Cu] was reduced in the medium. Brief exposure of Cu-limited cells to 10 nmol L21 Cu increased the instantaneous Fe uptake rate by 1.5 times in T. oceanica. Steady-state uptake rates of both species at high, growth-saturating concentrations of Fe were also Cu dependent. Oceanic species appeared to have an additional Cu requirement that was independent of Fe acquisition and likely responsible for their higher requirements compared to coastal species. Evidence for the importance of Cu in natural communities of phytoplankton was obtained from an incubation experiment performed in the Fe-limited basin of the Bering Sea. Addition of 2 nmol L21 Cu doubled the phytoplankton net growth rate compared to the untreated controls and, in the presence of extra Fe, increased the growth rate compared to the samples amended with Fe alone. The results suggest that Cu may be an important micronutrient for phytoplankton |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Graham Peers Sarah-ann Quesnel Neil M. Price |
spellingShingle |
Graham Peers Sarah-ann Quesnel Neil M. Price Copper requirements for iron acquisition and growth of coastal and oceanic diatoms |
author_facet |
Graham Peers Sarah-ann Quesnel Neil M. Price |
author_sort |
Graham Peers |
title |
Copper requirements for iron acquisition and growth of coastal and oceanic diatoms |
title_short |
Copper requirements for iron acquisition and growth of coastal and oceanic diatoms |
title_full |
Copper requirements for iron acquisition and growth of coastal and oceanic diatoms |
title_fullStr |
Copper requirements for iron acquisition and growth of coastal and oceanic diatoms |
title_full_unstemmed |
Copper requirements for iron acquisition and growth of coastal and oceanic diatoms |
title_sort |
copper requirements for iron acquisition and growth of coastal and oceanic diatoms |
publishDate |
2005 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.540.9010 http://www.aslo.org/lo/toc/vol_50/issue_4/1149.pdf |
geographic |
Bering Sea |
geographic_facet |
Bering Sea |
genre |
Bering Sea |
genre_facet |
Bering Sea |
op_source |
http://www.aslo.org/lo/toc/vol_50/issue_4/1149.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.540.9010 http://www.aslo.org/lo/toc/vol_50/issue_4/1149.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766378077999333376 |