Article (Scientific journals)
Aphid-host plant interactions: Does aphid honeydew exactly reflect the host plant amino acid composition?
Leroy, Pascal; Wathelet, Bernard; Sabri, Ahmed et al.
2011In Arthropod-Plant Interactions, 5, p. 1-7
Peer reviewed
 

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Keywords :
amino acids; phloem sap; xylem sap; aphid; honeydew
Abstract :
[en] Plants provide aphids with unbalanced and low concentrations of amino acids. Likely, intracellular symbionts improve the aphid nutrition by participating to the synthesis of essential amino acids. To compare the aphid amino acid uptakes from the host plant and the aphids amino acid excretion into the honeydew, host plant exudates (phloem + xylem) from infested and uninfested Vicia faba L. plants were compared to the honeydew produced by two aphid species (Acyrthosiphon pisum Harris and Megoura viciae Buckton) feeding on V. faba. Our results show that an aphid infestation modifies the amino acid composition of the infested broad bean plant since the global concentration of amino acids significantly increased into the host plant in response to aphid infestations. Specifically, the concentrations of two amino acids glutamine and asparagine were strongly enhanced. The amino acid profiles from honeydews were similar for the two aphid species, but the concentrations found into the honeydews were generally lower than those measured in the exudates of infested plants (aphids uptakes). This work also highlights that aphids take large amounts of amino acids into the host plant, especially glutamine and asparagine which are converted into glutamic and aspartic acids but also into other essential amino acids. The amino acid profiles differed between the host plant exudates and the aphid excretion product. Finally, this study highlights that the pea aphid - a “specialist” for the V. faba host plant - induced more important modifications into the host plant amino acid composition than the “generalist” aphid M. viciae.
Disciplines :
Entomology & pest control
Author, co-author :
Leroy, Pascal ;  Université de Liège - ULiège > Sciences agronomiques > Entomologie fonctionnelle et évolutive
Wathelet, Bernard ;  Université de Liège - ULiège > Chimie et bio-industries > Chimie biologique industrielle
Sabri, Ahmed ;  Université de Liège - ULiège > Centre Wallon de biologie industrielle
Francis, Frédéric  ;  Université de Liège - ULiège > Sciences agronomiques > Entomologie fonctionnelle et évolutive
Verheggen, François  ;  Université de Liège - ULiège > Sciences agronomiques > Entomologie fonctionnelle et évolutive
Capella, Quentin
Thonart, Philippe ;  Université de Liège - ULiège > Département des sciences de la vie > Biochimie et microbiologie industrielles
Haubruge, Eric  ;  Université de Liège - ULiège > Services administratifs généraux > Vice-Recteur de Gembloux Agro Bio Tech
Language :
English
Title :
Aphid-host plant interactions: Does aphid honeydew exactly reflect the host plant amino acid composition?
Publication date :
28 February 2011
Journal title :
Arthropod-Plant Interactions
ISSN :
1872-8855
eISSN :
1872-8847
Publisher :
Springer
Volume :
5
Pages :
1-7
Peer reviewed :
Peer reviewed
Name of the research project :
Solaphid
Funders :
Région wallonne [BE]
Available on ORBi :
since 21 June 2011

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