The role of seawater endocytosis in the biomineralization process in calcareous foraminifera
Foraminifera are unicellular organisms that inhabit the oceans in various ecosystems. The majority of the foraminifera precipitate calcitic shells and are among the major CaCO3 producers in the oceans. They comprise an important component of the global carbon cycle and also provide valuable paleocea...
Published in: | Proceedings of the National Academy of Sciences |
---|---|
Main Authors: | , , |
Format: | Text |
Language: | English |
Published: |
National Academy of Sciences
2009
|
Subjects: | |
Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2799886 http://www.ncbi.nlm.nih.gov/pubmed/20007770 https://doi.org/10.1073/pnas.0906636106 |
id |
ftpubmed:oai:pubmedcentral.nih.gov:2799886 |
---|---|
record_format |
openpolar |
spelling |
ftpubmed:oai:pubmedcentral.nih.gov:2799886 2023-05-15T17:50:25+02:00 The role of seawater endocytosis in the biomineralization process in calcareous foraminifera Bentov, Shmuel Brownlee, Colin Erez, Jonathan 2009-12-22 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2799886 http://www.ncbi.nlm.nih.gov/pubmed/20007770 https://doi.org/10.1073/pnas.0906636106 en eng National Academy of Sciences http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2799886 http://www.ncbi.nlm.nih.gov/pubmed/20007770 http://dx.doi.org/10.1073/pnas.0906636106 Physical Sciences Text 2009 ftpubmed https://doi.org/10.1073/pnas.0906636106 2013-09-02T20:12:34Z Foraminifera are unicellular organisms that inhabit the oceans in various ecosystems. The majority of the foraminifera precipitate calcitic shells and are among the major CaCO3 producers in the oceans. They comprise an important component of the global carbon cycle and also provide valuable paleoceanographic information based on the relative abundance of stable isotopes and trace elements (proxies) in their shells. Understanding the biomineralization processes in foraminifera is important for predicting their calcification response to ocean acidification and for reliable interpretation of the paleoceanographic proxies. Most models of biomineralization invoke the involvement of membrane ion transporters (channels and pumps) in the delivery of Ca2+ and other ions to the calcification site. Here we show, in contrast, that in the benthic foraminiferan Amphistegina lobifera, (a shallow water species), transport of seawater via fluid phase endocytosis may account for most of the ions supplied to the calcification site. During their intracellular passage the seawater vacuoles undergo alkalization that elevates the CO32− concentration and further enhances their calcifying potential. This mechanism of biomineralization may explain why many calcareous foraminifera can be good recorders of paleoceanographic conditions. It may also explain the sensitivity to ocean acidification that was observed in several planktonic and benthic species. Text Ocean acidification PubMed Central (PMC) Proceedings of the National Academy of Sciences 106 51 21500 21504 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Physical Sciences |
spellingShingle |
Physical Sciences Bentov, Shmuel Brownlee, Colin Erez, Jonathan The role of seawater endocytosis in the biomineralization process in calcareous foraminifera |
topic_facet |
Physical Sciences |
description |
Foraminifera are unicellular organisms that inhabit the oceans in various ecosystems. The majority of the foraminifera precipitate calcitic shells and are among the major CaCO3 producers in the oceans. They comprise an important component of the global carbon cycle and also provide valuable paleoceanographic information based on the relative abundance of stable isotopes and trace elements (proxies) in their shells. Understanding the biomineralization processes in foraminifera is important for predicting their calcification response to ocean acidification and for reliable interpretation of the paleoceanographic proxies. Most models of biomineralization invoke the involvement of membrane ion transporters (channels and pumps) in the delivery of Ca2+ and other ions to the calcification site. Here we show, in contrast, that in the benthic foraminiferan Amphistegina lobifera, (a shallow water species), transport of seawater via fluid phase endocytosis may account for most of the ions supplied to the calcification site. During their intracellular passage the seawater vacuoles undergo alkalization that elevates the CO32− concentration and further enhances their calcifying potential. This mechanism of biomineralization may explain why many calcareous foraminifera can be good recorders of paleoceanographic conditions. It may also explain the sensitivity to ocean acidification that was observed in several planktonic and benthic species. |
format |
Text |
author |
Bentov, Shmuel Brownlee, Colin Erez, Jonathan |
author_facet |
Bentov, Shmuel Brownlee, Colin Erez, Jonathan |
author_sort |
Bentov, Shmuel |
title |
The role of seawater endocytosis in the biomineralization process in calcareous foraminifera |
title_short |
The role of seawater endocytosis in the biomineralization process in calcareous foraminifera |
title_full |
The role of seawater endocytosis in the biomineralization process in calcareous foraminifera |
title_fullStr |
The role of seawater endocytosis in the biomineralization process in calcareous foraminifera |
title_full_unstemmed |
The role of seawater endocytosis in the biomineralization process in calcareous foraminifera |
title_sort |
role of seawater endocytosis in the biomineralization process in calcareous foraminifera |
publisher |
National Academy of Sciences |
publishDate |
2009 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2799886 http://www.ncbi.nlm.nih.gov/pubmed/20007770 https://doi.org/10.1073/pnas.0906636106 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2799886 http://www.ncbi.nlm.nih.gov/pubmed/20007770 http://dx.doi.org/10.1073/pnas.0906636106 |
op_doi |
https://doi.org/10.1073/pnas.0906636106 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
106 |
container_issue |
51 |
container_start_page |
21500 |
op_container_end_page |
21504 |
_version_ |
1766157150493605888 |