On the Relationship between a Novel Prorocentrum sp. and Colonial Phaeocystis antarctica under Iron and Vitamin B12 Limitation: Ecological Implications for Antarctic Waters
We collected live mixed natural samples from the northeastern Ross Sea during the austral summer of 2017 and isolated a novel Prorocentrum sp. (Dinophyceae) associated with mucilaginous Phaeocystis antarctica (Coccolithophyceae) colonies. The haptophyte P. antarctica is a key species of the phytopla...
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Online Access: | https://www.openaccessrepository.it/record/146790 https://doi.org/10.3390/app10196965 |
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ftopenaccessrep:oai:zenodo.org:146790 2024-05-12T07:56:38+00:00 On the Relationship between a Novel Prorocentrum sp. and Colonial Phaeocystis antarctica under Iron and Vitamin B12 Limitation: Ecological Implications for Antarctic Waters Bolinesi, Francesco Saggiomo, Maria Aceto, Serena Cordone, Angelina Serino, Emanuela Valoroso, Maria Carmen Mangoni, Olga 2020-10-05 https://www.openaccessrepository.it/record/146790 https://doi.org/10.3390/app10196965 eng eng url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/146790 doi:10.3390/app10196965 info:eu-repo/semantics/openAccess http://www.opendefinition.org/licenses/cc-by Fluid Flow and Transfer Processes Computer Science Applications Process Chemistry and Technology General Engineering Instrumentation General Materials Science info:eu-repo/semantics/article publication-article 2020 ftopenaccessrep https://doi.org/10.3390/app10196965 2024-04-17T14:47:25Z We collected live mixed natural samples from the northeastern Ross Sea during the austral summer of 2017 and isolated a novel Prorocentrum sp. (Dinophyceae) associated with mucilaginous Phaeocystis antarctica (Coccolithophyceae) colonies. The haptophyte P. antarctica is a key species of the phytoplankton community in the Ross Sea, where blooms are subjected to iron limitation and/or co-limitation with other micronutrients (e.g., vitamin B12) during the summer. We first performed preliminary genetic analyses to determine the specific identity of the novel Prorocentrum sp., which indicated that it represented a previously undescribed species. The formal description of this new species is in process. To further assess its relationship with P. antarctica, we obtained their monospecific and mixed cultures and evaluated their responses to different irradiance levels and iron and vitamin B12 limitation. Our results indicated differential susceptibility of the two species to iron limitation and differential photosynthetic plasticity under high irradiance. Iron limitation reduced colony formation in P. antarctica and decreased the chlorophyll-a content in Prorocentrum sp., whereas B12 limitation did not affect growth or photosynthetic efficiency in either species. In addition, P. antarctica could photosynthesize efficiently under different irradiance levels, due to its ability to modulate the light adsorption cross-section of PSII, whereas Prorocentrum sp. exhibited lower photosynthetic plasticity and an inability to modulate both the maximum photochemical efficiency and effective adsorption cross-section of PSII under high irradiance. The trophic interaction between Prorocentrum sp. and P. antarctica could present ecological implications for the food webs and biogeochemical cycles of the Antarctic ecosystem. Considering the predicted climate-driven shifts in global ocean surface light regimes and changes in iron or vitamin B12 transfer, which are most likely to impact changes in the phytoplankton community structure, ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Ross Sea Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository Antarctic Austral Ross Sea The Antarctic Applied Sciences 10 19 6965 |
institution |
Open Polar |
collection |
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
op_collection_id |
ftopenaccessrep |
language |
English |
topic |
Fluid Flow and Transfer Processes Computer Science Applications Process Chemistry and Technology General Engineering Instrumentation General Materials Science |
spellingShingle |
Fluid Flow and Transfer Processes Computer Science Applications Process Chemistry and Technology General Engineering Instrumentation General Materials Science Bolinesi, Francesco Saggiomo, Maria Aceto, Serena Cordone, Angelina Serino, Emanuela Valoroso, Maria Carmen Mangoni, Olga On the Relationship between a Novel Prorocentrum sp. and Colonial Phaeocystis antarctica under Iron and Vitamin B12 Limitation: Ecological Implications for Antarctic Waters |
topic_facet |
Fluid Flow and Transfer Processes Computer Science Applications Process Chemistry and Technology General Engineering Instrumentation General Materials Science |
description |
We collected live mixed natural samples from the northeastern Ross Sea during the austral summer of 2017 and isolated a novel Prorocentrum sp. (Dinophyceae) associated with mucilaginous Phaeocystis antarctica (Coccolithophyceae) colonies. The haptophyte P. antarctica is a key species of the phytoplankton community in the Ross Sea, where blooms are subjected to iron limitation and/or co-limitation with other micronutrients (e.g., vitamin B12) during the summer. We first performed preliminary genetic analyses to determine the specific identity of the novel Prorocentrum sp., which indicated that it represented a previously undescribed species. The formal description of this new species is in process. To further assess its relationship with P. antarctica, we obtained their monospecific and mixed cultures and evaluated their responses to different irradiance levels and iron and vitamin B12 limitation. Our results indicated differential susceptibility of the two species to iron limitation and differential photosynthetic plasticity under high irradiance. Iron limitation reduced colony formation in P. antarctica and decreased the chlorophyll-a content in Prorocentrum sp., whereas B12 limitation did not affect growth or photosynthetic efficiency in either species. In addition, P. antarctica could photosynthesize efficiently under different irradiance levels, due to its ability to modulate the light adsorption cross-section of PSII, whereas Prorocentrum sp. exhibited lower photosynthetic plasticity and an inability to modulate both the maximum photochemical efficiency and effective adsorption cross-section of PSII under high irradiance. The trophic interaction between Prorocentrum sp. and P. antarctica could present ecological implications for the food webs and biogeochemical cycles of the Antarctic ecosystem. Considering the predicted climate-driven shifts in global ocean surface light regimes and changes in iron or vitamin B12 transfer, which are most likely to impact changes in the phytoplankton community structure, ... |
format |
Article in Journal/Newspaper |
author |
Bolinesi, Francesco Saggiomo, Maria Aceto, Serena Cordone, Angelina Serino, Emanuela Valoroso, Maria Carmen Mangoni, Olga |
author_facet |
Bolinesi, Francesco Saggiomo, Maria Aceto, Serena Cordone, Angelina Serino, Emanuela Valoroso, Maria Carmen Mangoni, Olga |
author_sort |
Bolinesi, Francesco |
title |
On the Relationship between a Novel Prorocentrum sp. and Colonial Phaeocystis antarctica under Iron and Vitamin B12 Limitation: Ecological Implications for Antarctic Waters |
title_short |
On the Relationship between a Novel Prorocentrum sp. and Colonial Phaeocystis antarctica under Iron and Vitamin B12 Limitation: Ecological Implications for Antarctic Waters |
title_full |
On the Relationship between a Novel Prorocentrum sp. and Colonial Phaeocystis antarctica under Iron and Vitamin B12 Limitation: Ecological Implications for Antarctic Waters |
title_fullStr |
On the Relationship between a Novel Prorocentrum sp. and Colonial Phaeocystis antarctica under Iron and Vitamin B12 Limitation: Ecological Implications for Antarctic Waters |
title_full_unstemmed |
On the Relationship between a Novel Prorocentrum sp. and Colonial Phaeocystis antarctica under Iron and Vitamin B12 Limitation: Ecological Implications for Antarctic Waters |
title_sort |
on the relationship between a novel prorocentrum sp. and colonial phaeocystis antarctica under iron and vitamin b12 limitation: ecological implications for antarctic waters |
publishDate |
2020 |
url |
https://www.openaccessrepository.it/record/146790 https://doi.org/10.3390/app10196965 |
geographic |
Antarctic Austral Ross Sea The Antarctic |
geographic_facet |
Antarctic Austral Ross Sea The Antarctic |
genre |
Antarc* Antarctic Antarctica Ross Sea |
genre_facet |
Antarc* Antarctic Antarctica Ross Sea |
op_relation |
url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/146790 doi:10.3390/app10196965 |
op_rights |
info:eu-repo/semantics/openAccess http://www.opendefinition.org/licenses/cc-by |
op_doi |
https://doi.org/10.3390/app10196965 |
container_title |
Applied Sciences |
container_volume |
10 |
container_issue |
19 |
container_start_page |
6965 |
_version_ |
1798836820261208064 |