Rapid responses to high temperature and desiccation but not to low temperature in the freeze tolerant sub-Antarctic caterpillar Pringleophaga marioni (Lepidoptera, Tineidae)
A broad definition of rapid cold hardening (RCH) is that it is the process whereby insects increase their survival of a sub-zero temperature after a brief (h) pre-exposure to a less severe low temperature. The effects of various pre-treatments on survival of two h at -7.9°C were investigated in the...
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Online Access: | http://hdl.handle.net/10019.1/11291 https://doi.org/10.1016/S0022-1910(02)00225-1 |
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ftunstellenbosch:oai:scholar.sun.ac.za:10019.1/11291 2023-11-12T04:03:07+01:00 Rapid responses to high temperature and desiccation but not to low temperature in the freeze tolerant sub-Antarctic caterpillar Pringleophaga marioni (Lepidoptera, Tineidae) Sinclair B.J. Chown S.L. 2003 http://hdl.handle.net/10019.1/11291 https://doi.org/10.1016/S0022-1910(02)00225-1 unknown Journal of Insect Physiology 49 1 221910 doi:10.1016/S0022-1910(02)00225-1 http://hdl.handle.net/10019.1/11291 acclimation cold tolerance desiccation freezing heat shock survival acclimatization animal Arctic article environment growth development and aging Lepidoptera physiology temperature Animals Arctic Regions Arthropoda Hexapoda Phacelia congesta Tineidae Article 2003 ftunstellenbosch https://doi.org/10.1016/S0022-1910(02)00225-1 2023-10-22T07:41:56Z A broad definition of rapid cold hardening (RCH) is that it is the process whereby insects increase their survival of a sub-zero temperature after a brief (h) pre-exposure to a less severe low temperature. The effects of various pre-treatments on survival of two h at -7.9°C were investigated in the freeze tolerant sub-Antarctic caterpillar Pringleophaga marioni (Lepidoptera: Tineidae), the first time RCH has been investigated in a freeze tolerant arthropod. All caterpillars froze when exposed to -7.9°C, and none of the low temperature pre-treatments (-5, 0, 5 and 15°C, as well as -5°C and 0°C with a delay before freezing) nor slow cooling (0.1°C/min) elicited any improvement in survival of -7.9°C as compared to controls. However, high temperature treatments (25, 30 and 35°C), desiccation and acclimation for 5 days at 0°C did result in significant increases in survival of the test temperature, possibly as a result of heat shock protein production. Haemolymph osmolality was elevated only by the 35°C pre-treatment. It is suggested that the unpredictable environment of Marion Island means that P. marioni must always be physiologically prepared to survive cold snaps, and that this year-round cold hardiness therefore supersedes a rapid cold hardening response. © 2003 Elsevier Science Ltd. All rights reserved. Article Article in Journal/Newspaper Antarc* Antarctic Arctic Marion Island Stellenbosch University: SUNScholar Research Repository Antarctic Arctic Journal of Insect Physiology 49 1 45 52 |
institution |
Open Polar |
collection |
Stellenbosch University: SUNScholar Research Repository |
op_collection_id |
ftunstellenbosch |
language |
unknown |
topic |
acclimation cold tolerance desiccation freezing heat shock survival acclimatization animal Arctic article environment growth development and aging Lepidoptera physiology temperature Animals Arctic Regions Arthropoda Hexapoda Phacelia congesta Tineidae |
spellingShingle |
acclimation cold tolerance desiccation freezing heat shock survival acclimatization animal Arctic article environment growth development and aging Lepidoptera physiology temperature Animals Arctic Regions Arthropoda Hexapoda Phacelia congesta Tineidae Sinclair B.J. Chown S.L. Rapid responses to high temperature and desiccation but not to low temperature in the freeze tolerant sub-Antarctic caterpillar Pringleophaga marioni (Lepidoptera, Tineidae) |
topic_facet |
acclimation cold tolerance desiccation freezing heat shock survival acclimatization animal Arctic article environment growth development and aging Lepidoptera physiology temperature Animals Arctic Regions Arthropoda Hexapoda Phacelia congesta Tineidae |
description |
A broad definition of rapid cold hardening (RCH) is that it is the process whereby insects increase their survival of a sub-zero temperature after a brief (h) pre-exposure to a less severe low temperature. The effects of various pre-treatments on survival of two h at -7.9°C were investigated in the freeze tolerant sub-Antarctic caterpillar Pringleophaga marioni (Lepidoptera: Tineidae), the first time RCH has been investigated in a freeze tolerant arthropod. All caterpillars froze when exposed to -7.9°C, and none of the low temperature pre-treatments (-5, 0, 5 and 15°C, as well as -5°C and 0°C with a delay before freezing) nor slow cooling (0.1°C/min) elicited any improvement in survival of -7.9°C as compared to controls. However, high temperature treatments (25, 30 and 35°C), desiccation and acclimation for 5 days at 0°C did result in significant increases in survival of the test temperature, possibly as a result of heat shock protein production. Haemolymph osmolality was elevated only by the 35°C pre-treatment. It is suggested that the unpredictable environment of Marion Island means that P. marioni must always be physiologically prepared to survive cold snaps, and that this year-round cold hardiness therefore supersedes a rapid cold hardening response. © 2003 Elsevier Science Ltd. All rights reserved. Article |
format |
Article in Journal/Newspaper |
author |
Sinclair B.J. Chown S.L. |
author_facet |
Sinclair B.J. Chown S.L. |
author_sort |
Sinclair B.J. |
title |
Rapid responses to high temperature and desiccation but not to low temperature in the freeze tolerant sub-Antarctic caterpillar Pringleophaga marioni (Lepidoptera, Tineidae) |
title_short |
Rapid responses to high temperature and desiccation but not to low temperature in the freeze tolerant sub-Antarctic caterpillar Pringleophaga marioni (Lepidoptera, Tineidae) |
title_full |
Rapid responses to high temperature and desiccation but not to low temperature in the freeze tolerant sub-Antarctic caterpillar Pringleophaga marioni (Lepidoptera, Tineidae) |
title_fullStr |
Rapid responses to high temperature and desiccation but not to low temperature in the freeze tolerant sub-Antarctic caterpillar Pringleophaga marioni (Lepidoptera, Tineidae) |
title_full_unstemmed |
Rapid responses to high temperature and desiccation but not to low temperature in the freeze tolerant sub-Antarctic caterpillar Pringleophaga marioni (Lepidoptera, Tineidae) |
title_sort |
rapid responses to high temperature and desiccation but not to low temperature in the freeze tolerant sub-antarctic caterpillar pringleophaga marioni (lepidoptera, tineidae) |
publishDate |
2003 |
url |
http://hdl.handle.net/10019.1/11291 https://doi.org/10.1016/S0022-1910(02)00225-1 |
geographic |
Antarctic Arctic |
geographic_facet |
Antarctic Arctic |
genre |
Antarc* Antarctic Arctic Marion Island |
genre_facet |
Antarc* Antarctic Arctic Marion Island |
op_relation |
Journal of Insect Physiology 49 1 221910 doi:10.1016/S0022-1910(02)00225-1 http://hdl.handle.net/10019.1/11291 |
op_doi |
https://doi.org/10.1016/S0022-1910(02)00225-1 |
container_title |
Journal of Insect Physiology |
container_volume |
49 |
container_issue |
1 |
container_start_page |
45 |
op_container_end_page |
52 |
_version_ |
1782336199316209664 |