Chemical Ecology Unit, Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Box 102, SE-230 53, Alnarp, Sweden.
Department of Zoological Sciences, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia.
Ecol Lett. 2019 Jan;22(1):108-118. doi: 10.1111/ele.13172. Epub 2018 Oct 28.
Tephritid flies are serious fruit pests. Despite clear niche differences, many species show considerable overlap in fruit preferences, of which we here analysed the olfactory correlate. Using the volatiles of four unrelated fruit species, antennal responses were quantified to construct a fruit-odour response database for four tephritid species. Although responses were distinct with a significant niche-correlated bias, the analyses show that the probability of detection of a volatile strongly increased with its sharedness across fruits. This also held for the unrelated fruit fly Drosophila melanogaster (DoOR repository-based analyses). We conjectured that shared volatiles signify 'host' to the fly 'nose' and induce attraction. Indeed, blends of volatiles shared by fruit and detected by all four species were very attractive for tephritid species, more than fruits. Quantitative whole antennal recordings en lieu of, or complementing bottom-up molecular neurogenetic approaches, enables comparative olfactomics in non-model species, and facilitate interpretation of olfaction in evolutionary, ecological, and applied contexts.
实蝇是严重的水果害虫。尽管存在明显的生态位差异，但许多物种在水果偏好上表现出相当大的重叠，我们在此分析了其嗅觉相关性。我们使用四种不相关的水果的挥发物，量化了触角反应，为四种实蝇物种构建了一个水果气味反应数据库。尽管反应明显具有与生态位相关的显著偏向，但分析表明，挥发性物质的检测概率随着其在水果中的共享程度而强烈增加。这对于不相关的果蝇 Drosophila melanogaster（基于 DoOR 存储库的分析）也是如此。我们推测，共享的挥发物对蝇“鼻子”表示“宿主”，并诱导吸引力。事实上，四种物种都能检测到的、由水果共享的挥发物混合物对实蝇物种非常有吸引力，甚至超过了水果。定量全触角记录可以替代或补充自下而上的分子神经遗传学方法，使非模型物种的比较嗅觉组学成为可能，并有助于在进化、生态和应用背景下解释嗅觉。
