Functional characterization of olfactory receptors in the Oriental fruit fly Bactrocera dorsalis that respond to plant volatiles

Insect Biochemistry and Molecular Biology
Hitomi MiyazakiHajime Ono

Abstract

The Oriental fruit fly, Bactrocera dorsalis, is a highly destructive pest of various fruits. The reproductive and host-finding behaviors of this species are affected by several plant semiochemicals that are perceived through chemosensory receptors. However, the chemosensory mechanisms by which this perception occurs have not been fully elucidated. We conducted RNA sequencing analysis of the chemosensory organs of B. dorsalis to identify the genes coding for chemosensory receptors. We identified 60 olfactory receptors (ORs), 17 gustatory receptors and 23 ionotropic receptors-including their homologs and variants-from the transcriptome of male antennae and proboscises. We functionally analyzed ten ORs co-expressed with the obligatory co-receptor ORCO in Xenopus oocytes to identify their ligands. We tested 24 compounds including attractants for several Bactrocera species and volatiles from the host fruits of B. dorsalis. We found that BdorOR13a co-expressed with ORCO responded robustly to 1-octen-3-ol. BdorOR82a co-expressed with ORCO responded significantly to geranyl acetate, but responded weakly to farnesenes (a mixture of isomers) and linalyl acetate. These four compounds were subsequently subjected to behavioral bioassays. Wh...Continue Reading

Associated Datasets

Citations

Aug 6, 2019·Insect Molecular Biology·R F MitchellD D McKenna
Feb 14, 2021·Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics·Yong XiaoYong-Jun Zhang
May 6, 2021·Insects·Francesca ScolariLucie Vaníčková
Oct 27, 2020·Journal of Agricultural and Food Chemistry·Hui-Min LiBing Wang

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