title: The impact of transgenic wheat expressing GNA (snowdrop lectin) on the aphids Sitobion avenae, Schizaphis graminum, and Rhopalosiphum padi.
abstract: This study investigated the impact of transgenic wheat expressing Galanthus nivalis agglutinin (GNA), commonly known as snowdrop lectin, on three wheat aphids: Sitobion avenae (F.), Schizaphis graminum (Rondani), and Rhopalosiphum padi (L.). We compared the feeding behavior and the  life-table parameters of aphids reared on GNA transgenic wheat (test group) and those aphids reared on untransformed wheat (control group). The results showed that the feeding behaviors of S. avenae and S. graminum on GNA transgenic wheat were affected. Compared with the control group, they  had shorter initial probing period, longer total nonprobing period, shorter initial and total phloem sap ingestion phase (waveform E2), shorter duration of sustained ingestion (E (pd) > 10 min), and lower percentage of phloem phase of the total observation time. Moreover, S. graminum made  more probes and had a longer total duration of extracellular stylet pathway (waveform C). The fecundity and intrinsic rate of natural increase (r(m)) of S. avenae and S. graminum on the transgenic wheat were lowered in the first and second generations, however, the survival and lifespan  were not affected. The effects of the GNA expressing wheat on S. graminum and S. avenae were not significant in the third generation, suggesting rapid adaptation by the two aphid species. Despite the impact we found on S. avenae and S. graminum, transgenic GNA expressing wheat did not have  any effects on R. padi.
authors.affiliation: Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, PR China.
authors.forename: Jin
authors.initials: J
authors.lastname: Miao
authors.forename: Yuqing
authors.initials: Y
authors.lastname: Wu
authors.forename: Weigang
authors.initials: W
authors.lastname: Xu
authors.forename: Lin
authors.initials: L
authors.lastname: Hu
authors.forename: Zhenxing
authors.initials: Z
authors.lastname: Yu
authors.forename: Qiongfang
authors.initials: Q
authors.lastname: Xu
mesh_terms: D000818:Animals; D001042:Aphids / Q000187:drug effects* / Q000254:growth & development; D005247:Feeding Behavior / Q000187:drug effects*; D005260:Female; D005298:Fertility / Q000187:drug effects; D037241:Mannose-Binding Lectins / Q000235:genetics / Q000494:pharmacology*; D037121:Plant Lectins / Q000235:genetics / Q000494:pharmacology*; D030821:Plants, Genetically Modified / Q000469:parasitology; D011158:Population Growth; D014908:Triticum / Q000235:genetics / Q000469:parasitology*
chemical_list: D037241:Mannose-Binding Lectins; D037121:Plant Lectins; C063117:snowdrop lectin