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J Econ Entomol

Title:		Physiological Responses Induced by Ostrinia furnacalis (Lepidoptera: Crambidae) Feeding in Maize and Their Effects on O. furnacalis Performance
Author(s):		Guo J; Guo J; He K; Bai S; Zhang T; Zhao J; Wang Z;
Address:		"State Key Laboratory for Biology of Plant Diseases and Insect Pests, MOA-CABI Joint Laboratory for Bio-safety, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China (guojingfei1989@126.com; gjq558@163.com; klhe@ippcaas.cn; sxbai@ippcaas.cn; zhtiantao@163.com; zywang@ippcaas.cn). State Key Laboratory for Biology of Plant Diseases and Insect Pests, MOA-CABI Joint Laboratory for Bio-safety, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China ( guojingfei1989@126.com ; gjq558@163.com ; klhe@ippcaas.cn ; sxbai@ippcaas.cn ; zhtiantao@163.com ; zywang@ippcaas.cn ). Functional and Evolutionary Entomology, Gembloux Agro-Bio Tech, University of Liege, Gembloux, Belgium. Maize Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China (maizezhao@126.com)"
Journal Title:		J Econ Entomol
Year:		2017
Volume:		110
Issue:		2
Page Number:		739 - 747
DOI:		10.1093/jee/tox060
ISSN/ISBN:		1938-291X (Electronic) 0022-0493 (Linking)
Abstract:		"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 ( ), net reproductive rate ( R 0 ), and intrinsic rate of increase ( r ) were also correspondingly affected. Biochemical assays indicated that 24 h 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 24 h 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"
Keywords:		Animals *Antibiosis Antioxidants/metabolism Benzoxazines/metabolism Food Chain Glucosides/metabolism *Herbivory Larva/growth & development/physiology Moths/growth & development/*physiology Plant Leaves/chemistry Zea mays/*physiology *Ostrinia furnacalis *;
Notes:		"MedlineGuo, Jingfei Guo, Jianqing He, Kanglai Bai, Shuxiong Zhang, Tiantao Zhao, Jiuran Wang, Zhenying eng Research Support, Non-U.S. Gov't England 2017/03/24 J Econ Entomol. 2017 Apr 1; 110(2):739-747. doi: 10.1093/jee/tox060"