PMID: 12770238May 29, 2003Paper

Living on a high sugar diet: the fate of sucrose ingested by a phloem-feeding insect, the pea aphid Acyrthosiphon pisum

Journal of Insect Physiology
D A AshfordA E Douglas

Abstract

The natural diet of aphids, plant phloem sap, generally contains high concentrations of sucrose. When pea aphids (Acyrthosiphon pisum) were fed on chemically defined diets containing sucrose radiolabelled in the glucose or fructose moiety, 2 to 12-fold and 87 to 110-fold more radioactivity was recovered from the tissues and honeydew, respectively, of aphids that ingested [U-(14)C-glucose]-sucrose than from those ingesting [U-(14)C-fructose]-sucrose. The total radioactivity recovered was 70% of the ingested [U-(14)C-glucose]-sucrose and <5% of ingested [U-(14)C-fructose]-sucrose. The dominant honeydew sugars produced by aphids feeding on 0.75 M sucrose diets were oligosaccharides comprising glucose. In vitro the guts of pea aphids had high sucrase activity, 1-5 U mg(-1) protein, generating equimolar glucose and fructose except at high sucrose concentrations where glucose production was inhibited (K(si)=0.1 M). These data suggest that the fructose moiety of ingested sucrose is assimilated very efficiently and may be preferentially respired by the aphid, and that the glucose moiety of sucrose is incorporated into oligosaccharides by the transglucosidase activity of the gut sucrase at high sucrose concentrations. These differences ...Continue Reading

References

May 29, 2003·Journal of Insect Physiology·M E. SalvucciG R. Wolfe

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Citations

Feb 12, 2013·Journal of Molecular Evolution·Marek Gabriško
May 25, 2012·The Protein Journal·Santosh K Upadhyay, Pradhyumna K Singh
Feb 13, 2001·Journal of Insect Physiology·D L Hendrix, M E Salvucci
May 29, 2003·Journal of Insect Physiology·Plinio T CristofolettiWalter R Terra
Dec 15, 2010·Insect Biochemistry and Molecular Biology·Lolita G MathewJeffrey A Fabrick
May 20, 2015·Insect Biochemistry and Molecular Biology·Jia-Hsin HuangAngela E Douglas
Oct 30, 2013·Insect Science·Lucy C CooperSimon R Leather
Jul 6, 2011·Journal of Insect Physiology·Julien PomponYvan Pelletier
Sep 20, 2005·Journal of Insect Physiology·A J KarleyA E Douglas
Nov 6, 2008·Insect Biochemistry and Molecular Biology·A J ShakesbyA E Douglas
Feb 17, 2017·Genome Biology and Evolution·Charlotte M SmithBryan J Cassone
Sep 2, 2016·The Journal of Experimental Biology·Klaus W Beyenbach
Feb 6, 2004·Assistive Technology : the Official Journal of RESNA·Frances Harris, Stephen Sprigle
Jan 17, 2014·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Amit VashishthaSuman Lakhanpaul
Feb 2, 2006·Journal of Experimental Botany·A E Douglas
Sep 12, 2018·Insect Biochemistry and Molecular Biology·Yulica Santos-Ortega, Nabil Killiny
Feb 3, 2019·Plant Science : an International Journal of Experimental Plant Biology·Vamsi NalamJyoti Shah
Aug 12, 2003·The Journal of Experimental Biology·L F Whitehead, A E Douglas
Mar 21, 2007·Insect Biochemistry and Molecular Biology·D R G PriceA E Douglas
Sep 16, 2017·Journal of Agricultural and Food Chemistry·Yong ZhangJulian Chen
Sep 22, 2009·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·Fábio V FonsecaCarlos P Silva
Dec 29, 2009·Journal of Insect Physiology·Julien PomponYvan Pelletier

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