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Archives of Phytopathology and Plant Protection Volume 45, 2012 - Issue 6
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Articles

Tropical grasshopper glutathione-S-transferase and detoxification of plant allelochemicals in Calotropis procera

G. Elsayed Faculty of Science, Taif University, Kingdom of Saudi Arabia; Department of Entomology, Faculty of Agriculture, Cairo University, EgyptCorrespondence[email protected]
,
Mohamed M. Ahmed Faculty of Science, Taif University, Kingdom of Saudi Arabia; Faculty of Veterinary Medicine, Department of Biochemistry, Menofia University, Egypt
,
Samy M.H. Sayed Faculty of Science, Taif University, Kingdom of Saudi Arabia; Department of Entomology, Faculty of Agriculture, Cairo University, Egypt
&
Sayed A.M. Amer Faculty of Science, Taif University, Kingdom of Saudi Arabia; Faculty of Science, Department of Zoology, Cairo University, Egypt
Pages 707-711 | Received 19 Apr 2011, Accepted 03 May 2011, Published online: 10 Aug 2011
 
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Abstract

Poecilocerus bufonius inhabits Saudi Arabia and uses Calotropis procera as its main host plant. Cardenolids of this plant are used by this grasshopper as chemical defence against the natural enemies. The activity of enzyme detoxification in mid-gut wall for these allelochemicals has been determined in this study. Results indicate that the activity of glutathione-S-transferase (GST) was significantly higher after 24 hours of feeding on the main host plant but no difference has been found after one, two, four and five hours of feeding.

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