title: Insulin receptors and wing dimorphism in rice planthoppers.
abstract: Wing polymorphism contributes significantly to the success of a wide variety of insects. However, its underlying molecular mechanism is less well understood. The migratory planthopper (BPH), Nilaparvata lugens, is one of the most extensively studied insects for wing polymorphism, due to its natural features of short- and long-winged morphs. Using the BPH as an example, we first surveyed the environmental cues that possibly influence wing developmental plasticity. Second, we explained the molecular basis by which two insulin receptors (InR1 and InR2) act as switches to determine alternative wing morphs in the BPH. This finding provides an additional layer of regulatory mechanism underlying wing polymorphism in insects in addition to juvenile hormones. Further, based on a discrete domain structure between InR1 and InR2 across insect species, we discussed the potential roles by which they might contribute to insect polymorphism. Last, we concluded with future directions of disentangling the insulin signalling pathway in the BPH, which serves as an ideal model for studying wing developmental plasticity in insects.This article is part of the themed issue 'Evo-devo in the genomics era, and the origins of morphological diversity'.
authors.affiliation: State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Agricultural Entomology, Institute of Insect Sciences, Zhejiang University, Hangzhou 310058, People's Republic of China haijunxu@zju.edu.cn.
authors.forename: Hai-Jun
authors.identifier: 0000-0002-7314-377X
authors.initials: HJ
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Agricultural Entomology, Institute of Insect Sciences, Zhejiang University, Hangzhou 310058, People's Republic of China chxzhang@zju.edu.cn.
authors.forename: Chuan-Xi
authors.identifier: 0000-0002-7784-1188
authors.initials: CX
authors.lastname: Zhang
mesh_terms: D000818:Animals; D006430:Hemiptera / Q000235:genetics / Q000254:growth & development / Q000502:physiology*; D019476:Insect Proteins / Q000235:genetics*; D011110:Polymorphism, Genetic; D011972:Receptor, Insulin / Q000235:genetics*; D015398:Signal Transduction; D014921:Wings, Animal / Q000254:growth & development*
chemical_list: D019476:Insect Proteins; D011972:Receptor, Insulin
keywords: insulin receptors; phenotypic plasticity; planthoppers; wing polymorphism