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J Chem Ecol

Title:		Potential role of lipoxygenases in defense against insect herbivory
Author(s):		Felton GW; Bi JL; Summers CB; Mueller AJ; Duffey SS;
Address:		"Department of Entomology, University of Arkansas, 72701, Fayetteville, Arkansas"
Journal Title:		J Chem Ecol
Year:		1994
Volume:		20
Issue:		3
Page Number:		651 - 666
DOI:		10.1007/BF02059605
ISSN/ISBN:		0098-0331 (Print) 0098-0331 (Linking)
Abstract:		"The potential role of the plant enzyme lipoxygenase in host resistance against the corn earwormHelicoverpa zea was examined. Lipoxygenase is present in most of the common host plants ofH. zea, with highest activity in the leguminous hosts such as soybean and redbean. Treatment of dietary proteins with linoleic acid and lipoxygenase significantly reduced the nutritive quality of soybean protein and soy foliar protein. Larval growth was reduced from 24 to 63% depending upon treatment. Feeding byH. zea on soybean plants caused damage-induced increases in foliar lipoxygenase and lipid peroxidation products. Larvae feeding on previously wounded plant tissue demonstrated decreased growth rates compared to larvae feeding on unwounded tissue. Midgut epithelium from larvae feeding on wounded tissues showed evidence of oxidative damage as indicated by significant increases in lipid peroxidation products and losses in free primary amines. The potential role of oxidative and nutritional stress as a plant defensive response to herbivory is discussed"
Keywords:
Notes:		"PubMed-not-MEDLINEFelton, G W Bi, J L Summers, C B Mueller, A J Duffey, S S eng 1994/03/01 J Chem Ecol. 1994 Mar; 20(3):651-66. doi: 10.1007/BF02059605"