Nitrogen starvation induces distinct photosynthetic responses and recovery dynamics in diatoms and prasinophytes.
Nitrogen stress is an important control on the growth of phytoplankton and varying responses to this common condition among taxa may affect their relative success within phytoplankton communities. We analyzed photosynthetic responses to nitrogen (N) stress in two classes of phytoplankton that often...
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ftdoajarticles:oai:doaj.org/article:a9e4446220374d50b4399566a0de0a13 2023-05-15T15:00:56+02:00 Nitrogen starvation induces distinct photosynthetic responses and recovery dynamics in diatoms and prasinophytes. Justin D Liefer Aneri Garg Douglas A Campbell Andrew J Irwin Zoe V Finkel 2018-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0195705 https://doaj.org/article/a9e4446220374d50b4399566a0de0a13 EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC5895044?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0195705 https://doaj.org/article/a9e4446220374d50b4399566a0de0a13 PLoS ONE, Vol 13, Iss 4, p e0195705 (2018) Medicine R Science Q article 2018 ftdoajarticles https://doi.org/10.1371/journal.pone.0195705 2022-12-30T22:05:33Z Nitrogen stress is an important control on the growth of phytoplankton and varying responses to this common condition among taxa may affect their relative success within phytoplankton communities. We analyzed photosynthetic responses to nitrogen (N) stress in two classes of phytoplankton that often dominate their respective size ranges, diatoms and prasinophytes, selecting species of distinct niches within each class. Changes in photosynthetic structures appeared similar within each class during N stress, but photophysiological and growth responses were more species- or niche-specific. In the coastal diatom Thalassiosira pseudonana and the oceanic diatom T. weissflogii, N starvation induced large declines in photosynthetic pigments and Photosystem II (PSII) quantity and activity as well as increases in the effective absorption cross-section of PSII photochemistry (σ'PSII). These diatoms also increased photoprotection through energy-dependent non-photochemical quenching (NPQ) during N starvation. Resupply of N in diatoms caused rapid recovery of growth and relaxation of NPQ, while recovery of PSII photochemistry was slower. In contrast, the prasinophytes Micromonas sp., an Arctic Ocean species, and Ostreococcus tauri, a temperate coastal eutrophile, showed little change in photosynthetic pigments and structures and a decline or no change, respectively, in σ'PSII with N starvation. Growth and PSII function recovered quickly in Micromonas sp. after resupply of N while O. tauri failed to recover N-replete levels of electron transfer from PSII and growth, possibly due to their distinct photoprotective strategies. O. tauri induced energy-dependent NPQ for photoprotection that may suit its variable and nutrient-rich habitat. Micromonas sp. relies upon both energy-dependent NPQ and a sustained, energy-independent NPQ mechanism. A strategy in Micromonas sp. that permits photoprotection with little change in photosynthetic structures is consistent with its Arctic niche, where low temperatures and thus low biosynthetic ... Article in Journal/Newspaper Arctic Arctic Ocean Phytoplankton Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean PLOS ONE 13 4 e0195705 |
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Directory of Open Access Journals: DOAJ Articles |
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language |
English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Justin D Liefer Aneri Garg Douglas A Campbell Andrew J Irwin Zoe V Finkel Nitrogen starvation induces distinct photosynthetic responses and recovery dynamics in diatoms and prasinophytes. |
topic_facet |
Medicine R Science Q |
description |
Nitrogen stress is an important control on the growth of phytoplankton and varying responses to this common condition among taxa may affect their relative success within phytoplankton communities. We analyzed photosynthetic responses to nitrogen (N) stress in two classes of phytoplankton that often dominate their respective size ranges, diatoms and prasinophytes, selecting species of distinct niches within each class. Changes in photosynthetic structures appeared similar within each class during N stress, but photophysiological and growth responses were more species- or niche-specific. In the coastal diatom Thalassiosira pseudonana and the oceanic diatom T. weissflogii, N starvation induced large declines in photosynthetic pigments and Photosystem II (PSII) quantity and activity as well as increases in the effective absorption cross-section of PSII photochemistry (σ'PSII). These diatoms also increased photoprotection through energy-dependent non-photochemical quenching (NPQ) during N starvation. Resupply of N in diatoms caused rapid recovery of growth and relaxation of NPQ, while recovery of PSII photochemistry was slower. In contrast, the prasinophytes Micromonas sp., an Arctic Ocean species, and Ostreococcus tauri, a temperate coastal eutrophile, showed little change in photosynthetic pigments and structures and a decline or no change, respectively, in σ'PSII with N starvation. Growth and PSII function recovered quickly in Micromonas sp. after resupply of N while O. tauri failed to recover N-replete levels of electron transfer from PSII and growth, possibly due to their distinct photoprotective strategies. O. tauri induced energy-dependent NPQ for photoprotection that may suit its variable and nutrient-rich habitat. Micromonas sp. relies upon both energy-dependent NPQ and a sustained, energy-independent NPQ mechanism. A strategy in Micromonas sp. that permits photoprotection with little change in photosynthetic structures is consistent with its Arctic niche, where low temperatures and thus low biosynthetic ... |
format |
Article in Journal/Newspaper |
author |
Justin D Liefer Aneri Garg Douglas A Campbell Andrew J Irwin Zoe V Finkel |
author_facet |
Justin D Liefer Aneri Garg Douglas A Campbell Andrew J Irwin Zoe V Finkel |
author_sort |
Justin D Liefer |
title |
Nitrogen starvation induces distinct photosynthetic responses and recovery dynamics in diatoms and prasinophytes. |
title_short |
Nitrogen starvation induces distinct photosynthetic responses and recovery dynamics in diatoms and prasinophytes. |
title_full |
Nitrogen starvation induces distinct photosynthetic responses and recovery dynamics in diatoms and prasinophytes. |
title_fullStr |
Nitrogen starvation induces distinct photosynthetic responses and recovery dynamics in diatoms and prasinophytes. |
title_full_unstemmed |
Nitrogen starvation induces distinct photosynthetic responses and recovery dynamics in diatoms and prasinophytes. |
title_sort |
nitrogen starvation induces distinct photosynthetic responses and recovery dynamics in diatoms and prasinophytes. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2018 |
url |
https://doi.org/10.1371/journal.pone.0195705 https://doaj.org/article/a9e4446220374d50b4399566a0de0a13 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Phytoplankton |
genre_facet |
Arctic Arctic Ocean Phytoplankton |
op_source |
PLoS ONE, Vol 13, Iss 4, p e0195705 (2018) |
op_relation |
http://europepmc.org/articles/PMC5895044?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0195705 https://doaj.org/article/a9e4446220374d50b4399566a0de0a13 |
op_doi |
https://doi.org/10.1371/journal.pone.0195705 |
container_title |
PLOS ONE |
container_volume |
13 |
container_issue |
4 |
container_start_page |
e0195705 |
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1766332983699046400 |