Ice-active substances associated with Antarctic freshwater and terrestrial photosynthetic organisms
Macromolecular substances that cause pitting and other modifications of growing ice crystals were found to be associated with cyanobacterial mats, eukaryotic algae and mosses from Ross Island and the McMurdo Dry Valleys, Antarctica. Ice-pitting activities were largely retained by dialysis membranes...
Published in: | Antarctic Science |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2000
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0954102000000493 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102000000493 |
id |
crcambridgeupr:10.1017/s0954102000000493 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0954102000000493 2024-03-03T08:37:49+00:00 Ice-active substances associated with Antarctic freshwater and terrestrial photosynthetic organisms Raymond, James A. Fritsen, Christian H. 2000 http://dx.doi.org/10.1017/s0954102000000493 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102000000493 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 12, issue 4, page 418-424 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2000 crcambridgeupr https://doi.org/10.1017/s0954102000000493 2024-02-08T08:48:29Z Macromolecular substances that cause pitting and other modifications of growing ice crystals were found to be associated with cyanobacterial mats, eukaryotic algae and mosses from Ross Island and the McMurdo Dry Valleys, Antarctica. Ice-pitting activities were largely retained by dialysis membranes with molecular weight cut-offs of up to 300 kDa. Unlike most aqueous solutes, the ice-active molecules were not excluded from the ice phase during freezing. The ice-pitting activities of each of the samples tested was destroyed by exposure to temperatures between 45 and 65°C, suggesting that they have a protein component. Ice-active substances were not found in cyanobacteria or mosses from temperate climates, but ice-activity was found to be associated with mosses from cold habitats in North America. Although the function of the ice-active substances is not known, their apparent confinement to cold environments suggests that they have a cryoprotective role. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Antarctica McMurdo Dry Valleys Ross Island Cambridge University Press Antarctic McMurdo Dry Valleys Ross Island Antarctic Science 12 4 418 424 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Raymond, James A. Fritsen, Christian H. Ice-active substances associated with Antarctic freshwater and terrestrial photosynthetic organisms |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Macromolecular substances that cause pitting and other modifications of growing ice crystals were found to be associated with cyanobacterial mats, eukaryotic algae and mosses from Ross Island and the McMurdo Dry Valleys, Antarctica. Ice-pitting activities were largely retained by dialysis membranes with molecular weight cut-offs of up to 300 kDa. Unlike most aqueous solutes, the ice-active molecules were not excluded from the ice phase during freezing. The ice-pitting activities of each of the samples tested was destroyed by exposure to temperatures between 45 and 65°C, suggesting that they have a protein component. Ice-active substances were not found in cyanobacteria or mosses from temperate climates, but ice-activity was found to be associated with mosses from cold habitats in North America. Although the function of the ice-active substances is not known, their apparent confinement to cold environments suggests that they have a cryoprotective role. |
format |
Article in Journal/Newspaper |
author |
Raymond, James A. Fritsen, Christian H. |
author_facet |
Raymond, James A. Fritsen, Christian H. |
author_sort |
Raymond, James A. |
title |
Ice-active substances associated with Antarctic freshwater and terrestrial photosynthetic organisms |
title_short |
Ice-active substances associated with Antarctic freshwater and terrestrial photosynthetic organisms |
title_full |
Ice-active substances associated with Antarctic freshwater and terrestrial photosynthetic organisms |
title_fullStr |
Ice-active substances associated with Antarctic freshwater and terrestrial photosynthetic organisms |
title_full_unstemmed |
Ice-active substances associated with Antarctic freshwater and terrestrial photosynthetic organisms |
title_sort |
ice-active substances associated with antarctic freshwater and terrestrial photosynthetic organisms |
publisher |
Cambridge University Press (CUP) |
publishDate |
2000 |
url |
http://dx.doi.org/10.1017/s0954102000000493 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102000000493 |
geographic |
Antarctic McMurdo Dry Valleys Ross Island |
geographic_facet |
Antarctic McMurdo Dry Valleys Ross Island |
genre |
Antarc* Antarctic Antarctic Science Antarctica McMurdo Dry Valleys Ross Island |
genre_facet |
Antarc* Antarctic Antarctic Science Antarctica McMurdo Dry Valleys Ross Island |
op_source |
Antarctic Science volume 12, issue 4, page 418-424 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102000000493 |
container_title |
Antarctic Science |
container_volume |
12 |
container_issue |
4 |
container_start_page |
418 |
op_container_end_page |
424 |
_version_ |
1792501877921808384 |