| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Outline of Final Research Achievements |
The fruit fly species in the genus Bactrocera and Zeugodacus are highly destructive pests 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 identified the genes coding for chemosensory receptors of three fruit fly species, and succeeded to characterized olfactory receptors in the Oriental fruit fly Bactrocera dorsalis that respond to plant volatiles in a heterologous expression system comprising Xenopus oocytes. We further assessed the attraction of both female and male flies to four volatiles recognized as ligands for the two ORs, and found that when used in combination with visual cues, certain plant volatiles had a significant effect on the landing behavior of mated females.
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