期刊
ELIFE
卷 11, 期 -, 页码 -出版社
eLIFE SCIENCES PUBL LTD
DOI: 10.7554/eLife.81703
关键词
Drosophila suzukii; sugar sensation; mechanosensation; egg-lying; ripe fruit; Other
类别
资金
- National Institutes of Health [K01 DC020145, 1F32DC019302, R35 GM128670, R01 DC02174, R01 DC04729, R01 DC011697]
This study explores the differences in sensation and taste between the agricultural pest Drosophila suzukii and other Drosophila species, and finds that D. suzukii has undergone various changes in sweet taste sensation and mechanosensation, which are likely to contribute to its differences in egg-laying preferences.
The agricultural pest Drosophila suzukii differs from most other Drosophila species in that it lays eggs in ripe, rather than overripe, fruit. Previously, we showed that changes in bitter taste sensation accompanied this adaptation (Dweck et al., 2021). Here, we show that D. suzukii has also undergone a variety of changes in sweet taste sensation. D. suzukii has a weaker preference than Drosophila melanogaster for laying eggs on substrates containing all three primary fruit sugars: sucrose, fructose, and glucose. Major subsets of D. suzukii taste sensilla have lost electrophysiological responses to sugars. Expression of several key sugar receptor genes is reduced in the taste organs of D. suzukii. By contrast, certain mechanosensory channel genes, including no mechanoreceptor potential C, are expressed at higher levels in the taste organs of D. suzukii, which has a higher preference for stiff substrates. Finally, we find that D. suzukii responds differently from D. melanogaster to combinations of sweet and mechanosensory cues. Thus, the two species differ in sweet sensation, mechanosensation, and their integration, which are all likely to contribute to the differences in their egg-laying preferences in nature.
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