文献类型： 外文期刊

作者： Jiang, Xin ¹ ; Qin, Yaoguo ¹ ; Jiang, Jun ¹ ; Xu, Yun ⁴ ; Francis, Frederic ³ ; Fan, Jia ¹ ; Chen, Julian ¹ ;

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

2.Univ Lie

3.ge, Funct & Evolutionary Entomol, Gembloux Agro Bio Tech, Gembloux, Belgium

4.China Agr Univ, Coll Plant Protect, Dept Entomol, Beijing, Peoples R China

5.YAAS, Agr Environm & Resources Inst, Kunming, Peoples R China; China Agr Univ, Coll Plant Protect, MOA Key Lab Monitoring & Environm Friendly Control, Beijing, Peoples R China

关键词： Aphidifus gifuensis; transcriptome; odorant binding protein; spatial expression pattern; fluorescence binding assay

期刊名称：FRONTIERS IN PHYSIOLOGY （ 影响因子：4.755； 五年影响因子：5.316 ）

ISSN：

年卷期： 2022 年 13 卷

页码：

收录情况： SCI

摘要： In China, Aphidius gifuensis is one of the most common endoparasitoids of the green peach aphid Myzus persicae and grain aphid Sitobion miscanthi in the field. Insect odorant-binding proteins (OBPs) play vital roles in odor perception during feeding, host searching, mating and oviposition. In addition, some OBPs are involved in other physiological processes such as gustation and reproduction. In the present study, a comparative antennal transcriptomic analysis was applied between male and female A. gifuensis. The spatial expression patterns among antennae, heads, thoraxes, abdomens and legs of OBPs in both sexes were further profiled. Fifteen AgifOBPs were predicted, and 14 of them were identified by gene cloning, including 12 classic OBPs and 2 min-C OBPs. As expected, all OBPs were mainly expressed at high levels in antennae, heads or legs which are sensory organs and tissues. Finally, ligand binding properties of 2 OBPs (AgifOBP7 and AgifOBP9) were further evaluated. Female leg specifically expressed AgifOBP9 displays a broad and high binding property to aphid alarm pheromones, plant green volatiles and aphid sex pheromones (Ki < 10 mu M). However, female leg specifically expressed AgifOBP7 displays poor affinity for all tested ligands except CAU-II-11 ((E)-3,7-dimethylocta-2,6-dien-1-yl-2-hydroxy-3-methoxybenzoate), a reported (E)-beta-farnesene (EBF) analog with an exceptionally high binding affinity (Ki = 1.07 +/- 0.08 mu M). In summary, we reported the spatial expression pattern of the OBP repertoire in A. gifuensis, and further studied the binding properties of OBP7 and OBP9, which are mainly expressed in female legs, laying the foundation for the dissection of the contribution of OBPs to chemosensation in A. gifuensis.