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Physiological Responses Induced by Ostrinia furnacalis (Lepidoptera: Crambidae) Feeding in Maize and Their Effects on O. furnacalis Performance

文献类型: 外文期刊

作者: Guo, Jingfei 1 ; Guo, Jianqing 1 ; He, Kanglai 1 ; Bai, Shuxiong 1 ; Zhang, Tiantao 1 ; Zhao, Jiuran 3 ; Wang, Zhenyin 1 ;

作者机构: 1.Chinese Acad Agr Sci, State Key Lab Biol Plant Dis & Insect Pests, MOA CABI Joint Lab Biosafety, Inst Plant Protect, Beijing 100193, Peoples R China

2.Univ Liege, Funct & Evolutionary Entomol, Gembloux Agrobio Tech, Gembloux, Belgium

3.Beijing Acad Agr & Forestry Sci, Maize R

关键词: Ostrinia furnacalis;life table;benzoxazinoid;defensive enzyme;induced resistance

期刊名称:JOURNAL OF ECONOMIC ENTOMOLOGY ( 影响因子:2.381; 五年影响因子:2.568 )

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收录情况: SCI

摘要: Plants damaged by herbivorous insects often respond by mounting a series of defense responses that can inhibit the insect's fitness. Ostrinia furnacalis (Guenee) (Lepidoptera: Crambidae) is a major insect pest in maize throughout much of Asia, Australia, and the western Pacific islands. We examined the effects of O. furnacalis-induced maize defenses on O. furnacalis fitness, and explained the effects from biochemical changes that occur in maize leaves in response to O. furnacalis feeding. The results of the age-stage, two-sex life table showed that significantly longer larval and pupal life spans, and total preoviposition period (TPOP) occurred. A decrease in the longevity and fecundity of female adults was observed in O. furnacalis fed on O. furnacalis-damaged leaves. The mean generation time (T), finite rate of increase (k), net reproductive rate (R-0), and intrinsic rate of increase (r) were also correspondingly affected. Biochemical assays indicated that 24h of O. furnacalis herbivory resulted in decreased levels of the benzoxazinoids, 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA), and 2-(2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one)-beta-D-glucopyranose (DIMBOA-Glc), and a corresponding increase in 2-(2-hydroxy-4,7-dimethoxy-1,4-benzoxazin-3-one)-beta-D-glucopyranose (HDMBOA-Glc). Maize also exhibited higher activities of the defensive enzymes-peroxidase (POD), superoxide dismutase (SOD), catalase (CAT), and polyphenol oxidase (PPO)-after 24h of herbivory. We concluded that exposure to O. furnacalis-damaged leaves had an inhibitory impact on the fitness of the neonate to pupa stages of O. furnacalis. The observed higher level of HDMBOA-Glc and higher enzymatic activities of POD, SOD, CAT, and PPO may account, in part, for the observed inhibitory effects on O. furnacalis fitness.

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