Iron requirements of the pennate diatom Pseudo-nitzschia: Comparison of oceanic (high-nitrate, low-chlorophyll waters) and coastal species
We quantified and compared physiological parameters and iron requirements of several oceanic Pseudonitzschia spp., newly isolated from the high-nitrate, low-chlorophyll waters of the northeast subarctic Pacific, with coastal Pseudo-nitzschia spp. and the oceanic centric diatom Thalassiosira oceanica...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.419.1686 2023-05-15T18:28:32+02:00 Iron requirements of the pennate diatom Pseudo-nitzschia: Comparison of oceanic (high-nitrate, low-chlorophyll waters) and coastal species Adrian Marchetti Maria T. Maldonado Erin S. Lane Paul J. Harrison The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.419.1686 http://www.aslo.org/lo/toc/vol_51/issue_5/2092.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.419.1686 http://www.aslo.org/lo/toc/vol_51/issue_5/2092.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.aslo.org/lo/toc/vol_51/issue_5/2092.pdf text ftciteseerx 2016-01-08T03:51:38Z We quantified and compared physiological parameters and iron requirements of several oceanic Pseudonitzschia spp., newly isolated from the high-nitrate, low-chlorophyll waters of the northeast subarctic Pacific, with coastal Pseudo-nitzschia spp. and the oceanic centric diatom Thalassiosira oceanica at a range of iron concentrations. In iron-replete conditions, the iron (Fe) : carbon (C) ratios in the six Pseudo-nitzschia isolates ranged from 157 mmol Fe mol C 21 to 248 mmol Fe mol C 21, with no apparent differences between oceanic and coastal isolates. In low iron conditions, all Pseudo-nitzschia spp. exhibited marked reductions in photosynthetic efficiency, whereas the extent of the reductions in specific growth rates varied among species. When iron-limited, the Fe: C ratios decreased significantly in all oceanic Pseudo-nitzschia species, with the lowest ratios ranging from 2.8 mmol Fe mol C 21 to 3.7 mmol Fe mol C 21. Combined with faster growth rates, lower Fe: C ratios in oceanic isolates of Pseudo-nitzschia resulted in significantly higher iron-use efficiencies relative to their coastal congeners and T. oceanica. The wide range between iron-replete (Fe-Qhigh) and iron-limited (Fe-Qlow) quotas indicates that oceanic Pseudo-nitzschia spp. have an extensive plasticity in iron contents relative to other diatoms grown at similar iron concentrations reported in the literature; the Fe-Qhigh: Fe-Qlow ratios for oceanic species were 46 to 67, whereas for coastal Pseudo-nitzschia species they were 16 and 43. We suggest that the ability of oceanic Text Subarctic Unknown Pacific |
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ftciteseerx |
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English |
description |
We quantified and compared physiological parameters and iron requirements of several oceanic Pseudonitzschia spp., newly isolated from the high-nitrate, low-chlorophyll waters of the northeast subarctic Pacific, with coastal Pseudo-nitzschia spp. and the oceanic centric diatom Thalassiosira oceanica at a range of iron concentrations. In iron-replete conditions, the iron (Fe) : carbon (C) ratios in the six Pseudo-nitzschia isolates ranged from 157 mmol Fe mol C 21 to 248 mmol Fe mol C 21, with no apparent differences between oceanic and coastal isolates. In low iron conditions, all Pseudo-nitzschia spp. exhibited marked reductions in photosynthetic efficiency, whereas the extent of the reductions in specific growth rates varied among species. When iron-limited, the Fe: C ratios decreased significantly in all oceanic Pseudo-nitzschia species, with the lowest ratios ranging from 2.8 mmol Fe mol C 21 to 3.7 mmol Fe mol C 21. Combined with faster growth rates, lower Fe: C ratios in oceanic isolates of Pseudo-nitzschia resulted in significantly higher iron-use efficiencies relative to their coastal congeners and T. oceanica. The wide range between iron-replete (Fe-Qhigh) and iron-limited (Fe-Qlow) quotas indicates that oceanic Pseudo-nitzschia spp. have an extensive plasticity in iron contents relative to other diatoms grown at similar iron concentrations reported in the literature; the Fe-Qhigh: Fe-Qlow ratios for oceanic species were 46 to 67, whereas for coastal Pseudo-nitzschia species they were 16 and 43. We suggest that the ability of oceanic |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Adrian Marchetti Maria T. Maldonado Erin S. Lane Paul J. Harrison |
spellingShingle |
Adrian Marchetti Maria T. Maldonado Erin S. Lane Paul J. Harrison Iron requirements of the pennate diatom Pseudo-nitzschia: Comparison of oceanic (high-nitrate, low-chlorophyll waters) and coastal species |
author_facet |
Adrian Marchetti Maria T. Maldonado Erin S. Lane Paul J. Harrison |
author_sort |
Adrian Marchetti |
title |
Iron requirements of the pennate diatom Pseudo-nitzschia: Comparison of oceanic (high-nitrate, low-chlorophyll waters) and coastal species |
title_short |
Iron requirements of the pennate diatom Pseudo-nitzschia: Comparison of oceanic (high-nitrate, low-chlorophyll waters) and coastal species |
title_full |
Iron requirements of the pennate diatom Pseudo-nitzschia: Comparison of oceanic (high-nitrate, low-chlorophyll waters) and coastal species |
title_fullStr |
Iron requirements of the pennate diatom Pseudo-nitzschia: Comparison of oceanic (high-nitrate, low-chlorophyll waters) and coastal species |
title_full_unstemmed |
Iron requirements of the pennate diatom Pseudo-nitzschia: Comparison of oceanic (high-nitrate, low-chlorophyll waters) and coastal species |
title_sort |
iron requirements of the pennate diatom pseudo-nitzschia: comparison of oceanic (high-nitrate, low-chlorophyll waters) and coastal species |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.419.1686 http://www.aslo.org/lo/toc/vol_51/issue_5/2092.pdf |
geographic |
Pacific |
geographic_facet |
Pacific |
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Subarctic |
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Subarctic |
op_source |
http://www.aslo.org/lo/toc/vol_51/issue_5/2092.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.419.1686 http://www.aslo.org/lo/toc/vol_51/issue_5/2092.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766211053719388160 |