Peroxidative Responses of Leaves in Two Soybean Genotypes Injured by Twospotted Spider Mites (Acari: Tetranychidae)

Authors: Hildebrand, D. F.; Rodriguez, J. G.; Brown, G. C.; Luu, K. T.; Volden, C. S.

Source: Journal of Economic Entomology, Volume 79, Number 6, December 1986 , pp. 1459-1465(7)

Publisher: Entomological Society of America

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Levels of resistance in soybean genotypes to the twospotted spider mite, Tetranychus urticae Koch, and cumulative lipid peroxidation of the tissues were strongly related. Both were also correlated with loss of carotenoids and chlorophyll. Activity of the prooxidant enzyme lipoxygenase (LOX) and of peroxidase increased in parallel with T. urticae population levels and lipid peroxidation. Antioxidant enzymes catalase and superoxide dismutase did not change with increasing T. urticae population levels and lipid peroxidation. The mite-resistant soybean cultivar showed greater loss of carotenoids and chlorophyll and greater lipid peroxidation with initial T. urticae infestation than the mite-susceptible soybean cultivar. Increased resistance could be induced in remote tissues of the mite-resistant soybean cultivar by brief exposure to T. urticae feeding. Possible direct and indirect roles of lipid oxidation and LOX in pest resistance are discussed.

Document Type: Research Article

Publication date: December 1, 1986

More about this publication?
  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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