Article (Scientific journals)
Spatial Expression Analysis of Odorant Binding Proteins in Both Sexes of the Aphid Parasitoid Aphidius gifuensis and Their Ligand Binding Properties
Jiang, Xin; Qin, Yaoguo; Jiang, Jun et al.
2022In Frontiers in Physiology, 13
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Keywords :
Aphidifus gifuensis; Transcriptome; odorant binding protein; spatial expression pattern; fluorescence binding assay
Abstract :
[en] 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 μΜ). 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)-β-farnesene (EBF) analog with an exceptionally high binding affinity (Ki = 1.07 ± 0.08 μΜ). 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.
Disciplines :
Entomology & pest control
Author, co-author :
Jiang, Xin ;  Université de Liège - ULiège > TERRA Research Centre
Qin, Yaoguo
Jiang, Jun
Xu, Yun
Francis, Frédéric  ;  Université de Liège - ULiège > GxABT : Services généraux du site > Site GxABT - Relations internationales
Fan, Jia
Chen, Julian
Language :
English
Title :
Spatial Expression Analysis of Odorant Binding Proteins in Both Sexes of the Aphid Parasitoid Aphidius gifuensis and Their Ligand Binding Properties
Publication date :
04 May 2022
Journal title :
Frontiers in Physiology
eISSN :
1664-042X
Publisher :
Frontiers Media SA
Volume :
13
Peer reviewed :
Peer Reviewed verified by ORBi
Development Goals :
17. Partnerships for the goals
Available on ORBi :
since 11 June 2022

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