First evidence of chitin in calcified coralline algae: new insights into the calcification process of Clathromorphum compactum
Interest in calcifying coralline algae has been increasing over the past years due to the discovery of extensive coralline algal dominated ecosystems in Arctic and Subarctic latitudes, their projected sensitivity to ocean acidification and their utility as palaeoenvironmental proxies. Thus, it is cr...
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ftpubmed:oai:pubmedcentral.nih.gov:4141250 2023-05-15T14:57:40+02:00 First evidence of chitin in calcified coralline algae: new insights into the calcification process of Clathromorphum compactum Rahman, M. Azizur Halfar, Jochen 2014-08-22 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4141250 https://doi.org/10.1038/srep06162 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://dx.doi.org/10.1038/srep06162 Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-nd/4.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/ CC-BY-NC-ND Article Text 2014 ftpubmed https://doi.org/10.1038/srep06162 2014-08-24T01:05:04Z Interest in calcifying coralline algae has been increasing over the past years due to the discovery of extensive coralline algal dominated ecosystems in Arctic and Subarctic latitudes, their projected sensitivity to ocean acidification and their utility as palaeoenvironmental proxies. Thus, it is crucial to obtain a detailed understanding of their calcification process. We here extracted calcified skeletal organic matrix components including soluble and insoluble fractions from the widely-distributed Subarctic and Arctic coralline alga Clathromorphum compactum. The lyophilized skeletal organic matrix fractions showed comparatively high concentrations of soluble and insoluble organic matrices comprising 0.9% and 4.5% of skeletal weight, respectively. This is significantly higher than in other skeletal marine calcifiers. Attenuated Total Reflection-Fourier Transform Infrared Spectroscopy (ATR-FTIR) and X-Ray Diffraction (XRD) results indicate that chitin is present in the skeletal organic matrices of C. compactum. This polymer exhibits similar hierarchical structural organizations with collagen present in the matrix and serves as a template for nucleation and controls the location and orientation of mineral phases. Chitin contributes to significantly increasing skeletal strength, making C. compactum highly adapted for living in a shallow high-latitude benthic environment. Furthermore, chitin containing polysaccharides can increase resistance of calcifiers to negative effects of ocean acidification. Text Arctic Ocean acidification Subarctic PubMed Central (PMC) Arctic Scientific Reports 4 1 |
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Article Rahman, M. Azizur Halfar, Jochen First evidence of chitin in calcified coralline algae: new insights into the calcification process of Clathromorphum compactum |
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Article |
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Interest in calcifying coralline algae has been increasing over the past years due to the discovery of extensive coralline algal dominated ecosystems in Arctic and Subarctic latitudes, their projected sensitivity to ocean acidification and their utility as palaeoenvironmental proxies. Thus, it is crucial to obtain a detailed understanding of their calcification process. We here extracted calcified skeletal organic matrix components including soluble and insoluble fractions from the widely-distributed Subarctic and Arctic coralline alga Clathromorphum compactum. The lyophilized skeletal organic matrix fractions showed comparatively high concentrations of soluble and insoluble organic matrices comprising 0.9% and 4.5% of skeletal weight, respectively. This is significantly higher than in other skeletal marine calcifiers. Attenuated Total Reflection-Fourier Transform Infrared Spectroscopy (ATR-FTIR) and X-Ray Diffraction (XRD) results indicate that chitin is present in the skeletal organic matrices of C. compactum. This polymer exhibits similar hierarchical structural organizations with collagen present in the matrix and serves as a template for nucleation and controls the location and orientation of mineral phases. Chitin contributes to significantly increasing skeletal strength, making C. compactum highly adapted for living in a shallow high-latitude benthic environment. Furthermore, chitin containing polysaccharides can increase resistance of calcifiers to negative effects of ocean acidification. |
format |
Text |
author |
Rahman, M. Azizur Halfar, Jochen |
author_facet |
Rahman, M. Azizur Halfar, Jochen |
author_sort |
Rahman, M. Azizur |
title |
First evidence of chitin in calcified coralline algae: new insights into the calcification process of Clathromorphum compactum |
title_short |
First evidence of chitin in calcified coralline algae: new insights into the calcification process of Clathromorphum compactum |
title_full |
First evidence of chitin in calcified coralline algae: new insights into the calcification process of Clathromorphum compactum |
title_fullStr |
First evidence of chitin in calcified coralline algae: new insights into the calcification process of Clathromorphum compactum |
title_full_unstemmed |
First evidence of chitin in calcified coralline algae: new insights into the calcification process of Clathromorphum compactum |
title_sort |
first evidence of chitin in calcified coralline algae: new insights into the calcification process of clathromorphum compactum |
publisher |
Nature Publishing Group |
publishDate |
2014 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4141250 https://doi.org/10.1038/srep06162 |
geographic |
Arctic |
geographic_facet |
Arctic |
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Arctic Ocean acidification Subarctic |
genre_facet |
Arctic Ocean acidification Subarctic |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://dx.doi.org/10.1038/srep06162 |
op_rights |
Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-nd/4.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/ |
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CC-BY-NC-ND |
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https://doi.org/10.1038/srep06162 |
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Scientific Reports |
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