Influence of rearing temperature on triacylglycerol storage in the pea aphid, Acyrthosiphon pisum

Archives of Insect Biochemistry and Physiology
Zhaorigetu HubhachenJack W Dillwith

Abstract

Total fatty acids in the pea aphid reared at low temperatures increased significantly compared to that at high rearing temperatures. This change is reflected in a large increase of myristic acid, which occurs exclusively in triacylglycerols. When aphids were moved from 25°C to a lower rearing temperature at 10°C, saturated fatty acids accumulated over time, reaching a maximum at 16th day. When aphids were moved to 4°C, a temperature below the developmental threshold, those aphids did not accumulate saturated fatty acids. Similar results were observed when aphids were exposed to sequential decrease in rearing temperature. However, both total fatty acids and myristic acid in the aphids from the treatments of sequential decreasing rearing temperature were significantly higher compared to those in the aphids from the treatments of sudden decreasing rearing temperature. This result, therefore, supports the hypothesis that cold-adapted aphids can survive under threshold temperature for a longer period of time than noncold-adapted aphids. Acetyl-CoA carboxylase activity in the aphids at 25°C was twofold higher than that in the aphids at 10°C, whereas fatty acid synthase activities in the aphids reared at 25 and 10°C are similar. Aphid...Continue Reading

References

Jan 1, 1992·Journal of Animal Science·S B SmithH J Mersmann
Jan 1, 1982·Archives of Biochemistry and Biophysics·R O RyanG J Blomquist
May 29, 2003·Journal of Insect Physiology·K ItoyamaJ Hardie
Aug 1, 1959·Canadian Journal of Biochemistry and Physiology·E G BLIGH, W J DYER
May 14, 2005·Journal of Insect Physiology·Zhaorigetu ChenJack W Dillwith

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Citations

Jan 1, 2021·Food and Energy Security·Temitope JekayinoluwaJames Dale
Jun 3, 2021·International Journal of Molecular Sciences·Xiaofei ZhouYucheng Sun

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