Temperature adaptation of lipids in diapausing Ostrinia nubilalis: an experimental study to distinguish environmental versus endogenous controls

Larvae of the European corn borer ( Ostrinia nubilalis Hubn.) were cold acclimated during different phases of diapause to determine if changes in the fatty acid composition lipids occur as part of a programmed diapause strategy, or as a response to low temperatures during winter. Cold acclimation of...

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Published in:Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology Biochemical, systemic, and environmental physiology, 2018, Vol.188 (1), p.27-36
Main Authors: Vukašinović, Elvira L., Pond, David W., Grubor-Lajšić, Gordana, Worland, M. Roger, Kojić, Danijela, Purać, Jelena, Popović, Željko D., Blagojević, Duško P.
Format: Article
Language:English
Subjects:
Acclimation
Acclimatization
Animal Physiology
Biochemistry
Biomedical and Life Sciences
Biomedicine
Calorimetry
Cold
Cold acclimation
Corn
Diapause
Differential scanning calorimetry
Fatty acid composition
Fatty acids
Human Physiology
Larvae
Life Sciences
Lipids
Low temperature
Original Paper
Ostrinia nubilalis
Phase transitions
Phospholipids
Thermal analysis
Transition temperatures
Triglycerides
Zoology
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container_title Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology
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creator Vukašinović, Elvira L.
Pond, David W.
Grubor-Lajšić, Gordana
Worland, M. Roger
Kojić, Danijela
Purać, Jelena
Popović, Željko D.
Blagojević, Duško P.
description Larvae of the European corn borer ( Ostrinia nubilalis Hubn.) were cold acclimated during different phases of diapause to determine if changes in the fatty acid composition lipids occur as part of a programmed diapause strategy, or as a response to low temperatures during winter. Cold acclimation of fifth instar larvae of O. nubilalis during diapause had modest effects further on the readjustments in fatty acid composition of triacylglycerols and phospholipids. Overall, FA unsaturation (UFAs/SFAs ratio) was stable, with the exception of the triacylglycerols fraction after exposure to −3 and −10 °C in mid-diapause (MD) when it significantly increased. Differential scanning calorimetry (DSC) was used to examine phase transitions of total body lipid of cold-acclimated larvae in diapause. Thermal analysis indicated that changes in the melt transition temperatures of whole body total lipids were subtle, but consistent with the modest changes in the level of FA unsaturation observed. We conclude that lipid rearrangements are a function of the endogenous “diapause program” rather than a direct effect of low temperatures, which proved to have limited impact on lipid changes in diapausing larvae of O. nubilalis .
doi_str_mv 10.1007/s00360-017-1110-9
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Differential scanning calorimetry (DSC) was used to examine phase transitions of total body lipid of cold-acclimated larvae in diapause. Thermal analysis indicated that changes in the melt transition temperatures of whole body total lipids were subtle, but consistent with the modest changes in the level of FA unsaturation observed. We conclude that lipid rearrangements are a function of the endogenous “diapause program” rather than a direct effect of low temperatures, which proved to have limited impact on lipid changes in diapausing larvae of O. nubilalis .</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><pmid>28573529</pmid><doi>10.1007/s00360-017-1110-9</doi><tpages>10</tpages></addata></record>
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1432-136X
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subjects Acclimation
Acclimatization
Animal Physiology
Biochemistry
Biomedical and Life Sciences
Biomedicine
Calorimetry
Cold
Cold acclimation
Corn
Diapause
Differential scanning calorimetry
Fatty acid composition
Fatty acids
Human Physiology
Larvae
Life Sciences
Lipids
Low temperature
Original Paper
Ostrinia nubilalis
Phase transitions
Phospholipids
Thermal analysis
Transition temperatures
Triglycerides
Zoology
title Temperature adaptation of lipids in diapausing Ostrinia nubilalis: an experimental study to distinguish environmental versus endogenous controls
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