Surviving in a frozen desert: environmental stress physiology of terrestrial Antarctic arthropods
Abiotic stress is one of the primary constraints limiting the range and success of arthropods, and nowhere is this more apparent than Antarctica. Antarctic arthropods have evolved a suite of adaptations to cope with extremes in temperature and water availability. Here, we review the current state of...
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fthighwire:oai:open-archive.highwire.org:jexbio:217/1/84 2023-05-15T13:54:06+02:00 Surviving in a frozen desert: environmental stress physiology of terrestrial Antarctic arthropods Teets, Nicholas M. Denlinger, David L. 2014-01-01 00:00:00.0 text/html http://jeb.biologists.org/cgi/content/short/217/1/84 https://doi.org/10.1242/jeb.089490 en eng Company of Biologists http://jeb.biologists.org/cgi/content/short/217/1/84 http://dx.doi.org/10.1242/jeb.089490 Copyright (C) 2014, Company of Biologists ORGANISMAL STRESS TEXT 2014 fthighwire https://doi.org/10.1242/jeb.089490 2015-03-01T01:18:49Z Abiotic stress is one of the primary constraints limiting the range and success of arthropods, and nowhere is this more apparent than Antarctica. Antarctic arthropods have evolved a suite of adaptations to cope with extremes in temperature and water availability. Here, we review the current state of knowledge regarding the environmental physiology of terrestrial arthropods in Antarctica. To survive low temperatures, mites and Collembola are freeze-intolerant and rely on deep supercooling, in some cases supercooling below −30°C. Also, some of these microarthropods are capable of cryoprotective dehydration to extend their supercooling capacity and reduce the risk of freezing. In contrast, the two best-studied Antarctic insects, the midges Belgica antarctica and Eretmoptera murphyi , are freeze-tolerant year-round and rely on both seasonal and rapid cold-hardening to cope with decreases in temperature. A common theme among Antarctic arthropods is extreme tolerance of dehydration; some accomplish this by cuticular mechanisms to minimize water loss across their cuticle, while a majority have highly permeable cuticles but tolerate upwards of 50–70% loss of body water. Molecular studies of Antarctic arthropod stress physiology are still in their infancy, but several recent studies are beginning to shed light on the underlying mechanisms that govern extreme stress tolerance. Some common themes that are emerging include the importance of cuticular and cytoskeletal rearrangements, heat shock proteins, metabolic restructuring and cell recycling pathways as key mediators of cold and water stress in the Antarctic. Text Antarc* Antarctic Antarctica Belgica antarctica HighWire Press (Stanford University) Antarctic The Antarctic Journal of Experimental Biology 217 1 84 93 |
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HighWire Press (Stanford University) |
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English |
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ORGANISMAL STRESS |
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ORGANISMAL STRESS Teets, Nicholas M. Denlinger, David L. Surviving in a frozen desert: environmental stress physiology of terrestrial Antarctic arthropods |
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ORGANISMAL STRESS |
description |
Abiotic stress is one of the primary constraints limiting the range and success of arthropods, and nowhere is this more apparent than Antarctica. Antarctic arthropods have evolved a suite of adaptations to cope with extremes in temperature and water availability. Here, we review the current state of knowledge regarding the environmental physiology of terrestrial arthropods in Antarctica. To survive low temperatures, mites and Collembola are freeze-intolerant and rely on deep supercooling, in some cases supercooling below −30°C. Also, some of these microarthropods are capable of cryoprotective dehydration to extend their supercooling capacity and reduce the risk of freezing. In contrast, the two best-studied Antarctic insects, the midges Belgica antarctica and Eretmoptera murphyi , are freeze-tolerant year-round and rely on both seasonal and rapid cold-hardening to cope with decreases in temperature. A common theme among Antarctic arthropods is extreme tolerance of dehydration; some accomplish this by cuticular mechanisms to minimize water loss across their cuticle, while a majority have highly permeable cuticles but tolerate upwards of 50–70% loss of body water. Molecular studies of Antarctic arthropod stress physiology are still in their infancy, but several recent studies are beginning to shed light on the underlying mechanisms that govern extreme stress tolerance. Some common themes that are emerging include the importance of cuticular and cytoskeletal rearrangements, heat shock proteins, metabolic restructuring and cell recycling pathways as key mediators of cold and water stress in the Antarctic. |
format |
Text |
author |
Teets, Nicholas M. Denlinger, David L. |
author_facet |
Teets, Nicholas M. Denlinger, David L. |
author_sort |
Teets, Nicholas M. |
title |
Surviving in a frozen desert: environmental stress physiology of terrestrial Antarctic arthropods |
title_short |
Surviving in a frozen desert: environmental stress physiology of terrestrial Antarctic arthropods |
title_full |
Surviving in a frozen desert: environmental stress physiology of terrestrial Antarctic arthropods |
title_fullStr |
Surviving in a frozen desert: environmental stress physiology of terrestrial Antarctic arthropods |
title_full_unstemmed |
Surviving in a frozen desert: environmental stress physiology of terrestrial Antarctic arthropods |
title_sort |
surviving in a frozen desert: environmental stress physiology of terrestrial antarctic arthropods |
publisher |
Company of Biologists |
publishDate |
2014 |
url |
http://jeb.biologists.org/cgi/content/short/217/1/84 https://doi.org/10.1242/jeb.089490 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica Belgica antarctica |
genre_facet |
Antarc* Antarctic Antarctica Belgica antarctica |
op_relation |
http://jeb.biologists.org/cgi/content/short/217/1/84 http://dx.doi.org/10.1242/jeb.089490 |
op_rights |
Copyright (C) 2014, Company of Biologists |
op_doi |
https://doi.org/10.1242/jeb.089490 |
container_title |
Journal of Experimental Biology |
container_volume |
217 |
container_issue |
1 |
container_start_page |
84 |
op_container_end_page |
93 |
_version_ |
1766259756715999232 |