Article (Scientific journals)
Differences in glucosinolate degradation products related to aphid and Brassicaceae host plant myrosinases
Francis, Frédéric; Wathelet, Jean-Paul; Lognay, Georges
2001In GCIRC Bulletin
 

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Keywords :
glucosinolate; myrosinase; aphid
Abstract :
[en] Studies on chemical ecology of host plant selection by herbivores were largely carried out to orplain the diversity of secondary plant chemicals and host specialisation of herbivores. The glucosinolate - isothiocyanate system in Brassicaceae plants was considered as a plant defence and was known to influence the feeding behaviour of phytophagous insects such as the cabbage aphid, Brevicoryre brassicae. Purified m5nosinases from the latter and from white mustard, Sinqis alba, were used to hydrolyse two glucosinolate compounds. Identification of the degradation products, mainly isothiocyanates, was perficrmed by gas chromatography - mass spectromeûy. While sinigdn hydrolysis gave identical isothiocyanates for insect and plant enzymes, B. brassicae myrosinase showed a particular activity toward sinalbin A lost of an hydrory group was obsen'red for the two latter substrates related products when compared to the S. alba enzymatic specificity. Aphid and plant myrosinases have different properties and specificities which can be discussed in relation to a co-evolution approach.
Disciplines :
Entomology & pest control
Author, co-author :
Francis, Frédéric  ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech
Wathelet, Jean-Paul ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech
Lognay, Georges ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech
Language :
English
Title :
Differences in glucosinolate degradation products related to aphid and Brassicaceae host plant myrosinases
Publication date :
2001
Journal title :
GCIRC Bulletin
ISSN :
0765-9466
Publisher :
Groupe Consultatif International de Recherche sur le Colza, Paris, France
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