Seasonal changes in phospholipid class and class-specific fatty acid composition associated with the onset of freeze tolerance in third-instar larvae of Eurosta solidaginis

Physiological and Biochemical Zoology : PBZ
N L Pruitt, Changrui Lu

Abstract

Abstract Third-instar larvae of the goldenrod gall fly Eurosta solidaginis (Diptera: Tephritidae) are freeze tolerant in winter. During freezing, cell membranes must compensate for both low temperature and partial dehydration. Documented adaptations to low temperature include increased fatty acid unsaturation and enrichment of cone-shaped phosphatides, both of which inhibit formation of gel phase lipid domains. These changes appear inconsistent with adaptations known to prevent formation of the hexagonal II phospholipid phase at low water activities, namely, increased fatty acid saturation and increased proportions of cylindrical phosphatides. To address these inconsistencies, changes in E. solidaginis phospholipid composition and class-specific fatty acid composition were studied from August to November 2002. Cylindrical phosphatides, mostly phosphatidylcholine (PC), increased transiently and significantly, from 35% of the total to nearly 50%, during the transition from freeze susceptible to freeze tolerant. Monoenes in both PC and phosphatidylethanolamine (PE) represented 35% of total fatty acids in freeze-susceptible larvae but accumulated in PC to 48% and in PE to 42% in freeze-tolerant larvae. Moreover, PC accumulated the ...Continue Reading

References

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Citations

Jan 27, 2009·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Johannes OvergaardMartin Holmstrup
Feb 8, 2014·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Alice M ReynoldsJon P Costanzo
Feb 11, 2015·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Karina Vincents FiskerMartin Holmstrup
Jun 14, 2018·The Journal of Experimental Biology·Katie E Marshall, Brent J Sinclair
Nov 6, 2018·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Jon P Costanzo
Apr 4, 2019·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Thomas Enriquez, Hervé Colinet
Oct 8, 2020·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Yonggang NiuQiang Chen
May 3, 2014·The Journal of Experimental Biology·Katie E MarshallBrent J Sinclair

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