Intraspecific variability in Phaeocystis antarctica's response to iron and light stress
Phaeocystis antarctica is an abundant phytoplankton species in the Southern Ocean, where growth is frequently limited by iron and light. Being able to grow under low iron conditions is essential to the species’ success, but there have been hints that this ability differs among clones. Here, we compa...
Main Authors: | , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Public Library of Science
2017
|
Subjects: | |
Online Access: | https://authors.library.caltech.edu/79123/ https://authors.library.caltech.edu/79123/1/journal.pone.0179751.pdf https://authors.library.caltech.edu/79123/2/S1Table.docx https://authors.library.caltech.edu/79123/4/S2Table.docx https://authors.library.caltech.edu/79123/6/S3Table.docx https://authors.library.caltech.edu/79123/7/S4Table.docx https://authors.library.caltech.edu/79123/10/S5Table.docx https://resolver.caltech.edu/CaltechAUTHORS:20170717-092144983 |
id |
ftcaltechauth:oai:authors.library.caltech.edu:79123 |
---|---|
record_format |
openpolar |
spelling |
ftcaltechauth:oai:authors.library.caltech.edu:79123 2023-05-15T13:59:21+02:00 Intraspecific variability in Phaeocystis antarctica's response to iron and light stress Luxem, Katja E. Ellwood, Michael J. Strzepek, Robert F. 2017-07-10 application/pdf application/msword https://authors.library.caltech.edu/79123/ https://authors.library.caltech.edu/79123/1/journal.pone.0179751.pdf https://authors.library.caltech.edu/79123/2/S1Table.docx https://authors.library.caltech.edu/79123/4/S2Table.docx https://authors.library.caltech.edu/79123/6/S3Table.docx https://authors.library.caltech.edu/79123/7/S4Table.docx https://authors.library.caltech.edu/79123/10/S5Table.docx https://resolver.caltech.edu/CaltechAUTHORS:20170717-092144983 unknown Public Library of Science https://authors.library.caltech.edu/79123/1/journal.pone.0179751.pdf https://authors.library.caltech.edu/79123/2/S1Table.docx https://authors.library.caltech.edu/79123/4/S2Table.docx https://authors.library.caltech.edu/79123/6/S3Table.docx https://authors.library.caltech.edu/79123/7/S4Table.docx https://authors.library.caltech.edu/79123/10/S5Table.docx Luxem, Katja E. and Ellwood, Michael J. and Strzepek, Robert F. (2017) Intraspecific variability in Phaeocystis antarctica's response to iron and light stress. PLoS ONE, 12 (7). Art. No. e0179751. ISSN 1932-6203. PMCID PMC5503234. https://resolver.caltech.edu/CaltechAUTHORS:20170717-092144983 <https://resolver.caltech.edu/CaltechAUTHORS:20170717-092144983> Article PeerReviewed 2017 ftcaltechauth 2020-04-26T17:21:46Z Phaeocystis antarctica is an abundant phytoplankton species in the Southern Ocean, where growth is frequently limited by iron and light. Being able to grow under low iron conditions is essential to the species’ success, but there have been hints that this ability differs among clones. Here, we compare the growth, cell size and chlorophyll a concentrations of four P. antarctica clones cultured under different iron and light conditions. Iron was provided either as unchelated iron (Fe′) or bound to the bacterial siderophore desferrioxamine B, representing, respectively, the most and least bioavailable forms of iron which phytoplankton encounter in the marine environment. The growth rate data demonstrate that the clones vary in their ability to grow using organically bound iron, and that this ability is not related to their ability to grow at low inorganic iron concentrations. These results are consistent at low and high light. Physiologically, only three of the four clones shrink or decrease the concentration of chlorophyll a in response to iron limitation, and only one clone decreases colony formation. Together, our data show that P. antarctica clones 1) respond to the same degree of iron limitation using different acclimation strategies, and 2) vary in their ability to grow under the same external iron and light conditions. This physiological diversity is surprisingly large for isolates of a single phytoplankton species. Article in Journal/Newspaper Antarc* Antarctica Southern Ocean Caltech Authors (California Institute of Technology) Southern Ocean |
institution |
Open Polar |
collection |
Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
unknown |
description |
Phaeocystis antarctica is an abundant phytoplankton species in the Southern Ocean, where growth is frequently limited by iron and light. Being able to grow under low iron conditions is essential to the species’ success, but there have been hints that this ability differs among clones. Here, we compare the growth, cell size and chlorophyll a concentrations of four P. antarctica clones cultured under different iron and light conditions. Iron was provided either as unchelated iron (Fe′) or bound to the bacterial siderophore desferrioxamine B, representing, respectively, the most and least bioavailable forms of iron which phytoplankton encounter in the marine environment. The growth rate data demonstrate that the clones vary in their ability to grow using organically bound iron, and that this ability is not related to their ability to grow at low inorganic iron concentrations. These results are consistent at low and high light. Physiologically, only three of the four clones shrink or decrease the concentration of chlorophyll a in response to iron limitation, and only one clone decreases colony formation. Together, our data show that P. antarctica clones 1) respond to the same degree of iron limitation using different acclimation strategies, and 2) vary in their ability to grow under the same external iron and light conditions. This physiological diversity is surprisingly large for isolates of a single phytoplankton species. |
format |
Article in Journal/Newspaper |
author |
Luxem, Katja E. Ellwood, Michael J. Strzepek, Robert F. |
spellingShingle |
Luxem, Katja E. Ellwood, Michael J. Strzepek, Robert F. Intraspecific variability in Phaeocystis antarctica's response to iron and light stress |
author_facet |
Luxem, Katja E. Ellwood, Michael J. Strzepek, Robert F. |
author_sort |
Luxem, Katja E. |
title |
Intraspecific variability in Phaeocystis antarctica's response to iron and light stress |
title_short |
Intraspecific variability in Phaeocystis antarctica's response to iron and light stress |
title_full |
Intraspecific variability in Phaeocystis antarctica's response to iron and light stress |
title_fullStr |
Intraspecific variability in Phaeocystis antarctica's response to iron and light stress |
title_full_unstemmed |
Intraspecific variability in Phaeocystis antarctica's response to iron and light stress |
title_sort |
intraspecific variability in phaeocystis antarctica's response to iron and light stress |
publisher |
Public Library of Science |
publishDate |
2017 |
url |
https://authors.library.caltech.edu/79123/ https://authors.library.caltech.edu/79123/1/journal.pone.0179751.pdf https://authors.library.caltech.edu/79123/2/S1Table.docx https://authors.library.caltech.edu/79123/4/S2Table.docx https://authors.library.caltech.edu/79123/6/S3Table.docx https://authors.library.caltech.edu/79123/7/S4Table.docx https://authors.library.caltech.edu/79123/10/S5Table.docx https://resolver.caltech.edu/CaltechAUTHORS:20170717-092144983 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Antarc* Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctica Southern Ocean |
op_relation |
https://authors.library.caltech.edu/79123/1/journal.pone.0179751.pdf https://authors.library.caltech.edu/79123/2/S1Table.docx https://authors.library.caltech.edu/79123/4/S2Table.docx https://authors.library.caltech.edu/79123/6/S3Table.docx https://authors.library.caltech.edu/79123/7/S4Table.docx https://authors.library.caltech.edu/79123/10/S5Table.docx Luxem, Katja E. and Ellwood, Michael J. and Strzepek, Robert F. (2017) Intraspecific variability in Phaeocystis antarctica's response to iron and light stress. PLoS ONE, 12 (7). Art. No. e0179751. ISSN 1932-6203. PMCID PMC5503234. https://resolver.caltech.edu/CaltechAUTHORS:20170717-092144983 <https://resolver.caltech.edu/CaltechAUTHORS:20170717-092144983> |
_version_ |
1766267888908369920 |