Inducibility of metabolic insecticide defenses in boll weevils and tobacco budworm caterpillars |
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| Institution: | 1. Department of Natural Compounds and Analytical Chemistry, Migal – Galilee Research Institute, Kiryat Shmona, Israel;2. Analytical Chemistry Laboratory, Tel-Hai College, Upper Galilee, Israel;1. State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, China;2. Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization (MOA), Guangdong Province Key Laboratory of Tropical and Subtropical Fruit Tree Research, Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong 510640, China;3. Agricultural Biological Gene Research Center, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong 510640, China;1. Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou, 510650, China;2. University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, China;3. College of Food, South China Agricultural University, Wushan Road, Tianhe District, Guangzhou, 510642, China;4. Juxiangyuan Health Food (Zhongshan) Co., Ltd., No. 13, Yandong Second Road, Torch Development Zone, Zhongshan, 528400, China;5. Graduate School of Science and Technology, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu, 432-8561, Japan;1. Department of Plant Protection, Faculty of Agriculture, Shahid Bahonar University, Iran;2. Department of Plant Protection, Faculty of Agricultural Sciences, University of Mohaghegh Ardabili, Iran;1. Centre d’étude de la forêt (CEF), Département des sciences du bois et de la forêt Faculté de foresterie, de géographie et de géomatique, Université Laval, QC G1V 0A6, Canada;2. Department of Biology, Concordia University, 7141 Sherbrooke W., Montreal, QC H4B 1R6, Canada |
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| Abstract: | Of five cotton allelochemicals, (+)-α-pinene, β-caryophyllene, gossypol, umbelliferone, and scopoletin, all except gossypol induced cytochrome P-450 content, N-demethylation, and epoxidation activities more in tobacco budworm larval midguts than in adult or larval boll weevils. All except gossypol also induced glutathione transferase activity in tobacco budworm larval midguts and adult boll weevils. Microsomal esterase activity was unaffected or suppressed by all five allelochemicals. Soluble esterase activities were unaffected, or induced only in boll weevil larvae. The contrast in insecticide resistance development between the tobacco budworm and the boll weevil may be, in part, related to superior inducibility of cytochrome P-450 and associated activities in the former species in addition to overall higher uninduced activities (26). |
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