Document Detail

Effect of precocene II on fatty acid metabolism in the pea aphid, Acyrthosiphon pisum, under cold stress.
MedLine Citation:
PMID:  15890184     Owner:  NLM     Status:  MEDLINE    
Pea aphids, Acyrthosiphon pisum (Harris), reared at 10 degrees C contain higher levels of fatty acids than those reared at 25 degrees C. This is primarily the result of an accumulation of triacylglycerols containing myristic acid. When aphids reared at 25 degrees C were transferred to 10 degrees C there was a gradual increase in triacylglycerol content that reached a maximum at 16 days post-transfer. Treatment of aphids with precocene II prior to transfer to 10 degrees C blocked the accumulation of fatty acids including myristic acid. A single application of 2 microg precocene II/aphid or two applications of 0.5 microg precocene II/ aphid administered on consecutive days resulted in aphids moved to 10 degrees C maintaining the same fatty acid profile as aphids maintained at 25 degrees C. Aphids that were treated with precocene II and maintained at 25 degrees C did not show changes in fatty acid profiles. Rearing aphids at 10 degrees C resulted in lower rates of reproduction and lower total numbers of progeny with longer longevity. Treatment with precocene II significantly decreased the total number of progeny produced at both temperatures. Precocene II did not reduce life span of aphids reared at 25 degrees C, however, the life span of treated aphids reared at 10 degrees C was decreased. The mechanism by which precocene II prevents the accumulation of myristic acid in aphids reared at 10 degrees C remains to be determined.
Zhaorigetu Chen; Robin D Madden; Jack W Dillwith
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of insect physiology     Volume:  51     ISSN:  0022-1910     ISO Abbreviation:  J. Insect Physiol.     Publication Date:  2005 Apr 
Date Detail:
Created Date:  2005-05-13     Completed Date:  2005-08-04     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  2985080R     Medline TA:  J Insect Physiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  411-6     Citation Subset:  IM    
Department of Entomology and Plant Pathology, Oklahoma State University, Stillwater, 74078, USA.
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MeSH Terms
Aphids / drug effects*,  metabolism*
Benzopyrans / pharmacology*
Cold Temperature*
Fatty Acids / metabolism*
Insecticides / pharmacology
Reproduction / drug effects
Reg. No./Substance:
0/Benzopyrans; 0/Fatty Acids; 0/Insecticides; 644-06-4/precocene II

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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