Department of Entomology, University of California, Riverside, CA 92521, USA.
J Chem Ecol. 2012 Sep;38(9):1151-8. doi: 10.1007/s10886-012-0181-z. Epub 2012 Aug 26.
Recent work suggests that closely related cerambycid species often share pheromone components, or even produce pheromone blends of identical composition. However, little is known of the pheromones of species in the subfamily Prioninae. During field bioassays in California, males of three species in the prionine genus Tragosoma were attracted to 2,3-hexanediols, common components of male-produced aggregation pheromones of beetles in the subfamily Cerambycinae. We report here that the female-produced sex pheromone of Tragosoma depsarium "sp. nov. Laplante" is (2R,3R)-2,3-hexanediol, and provide evidence from field bioassays and electroantennography that the female-produced pheromone of both Tragosoma pilosicorne Casey and T. depsarium "harrisi" LeConte may be (2S,3R)-2,3-hexanediol. Sexual dimorphism in the sculpting of the prothorax suggests that the pheromone glands are located in the prothorax of females. This is the second sex attractant pheromone structure identified from the subfamily Prioninae, and our results provide further evidence of pheromonal parsimony within the Cerambycidae, in this case extending across both subfamily and gender lines.
最近的研究表明，亲缘关系密切的天牛物种通常具有相同的信息素成分，甚至会产生相同成分的信息素混合物。然而，对于 Prioninae 亚科物种的信息素知之甚少。在加利福尼亚的野外生物测定中，三种 Tragosoma 属天牛的雄性对 2,3-己二醇有吸引力，2,3-己二醇是 Cerambycinae 亚科雄性产生的聚集信息素的常见成分。我们在这里报告，Tragosoma depsarium“sp. nov. Laplante”的雌性产生的性信息素是（2R,3R）-2,3-己二醇，并提供了来自野外生物测定和触角电生理学的证据，表明 Tragosoma pilosicorne Casey 和 T. depsarium“harrisi”LeConte 的雌性产生的信息素可能是（2S,3R）-2,3-己二醇。前胸的形态发生的性别二态性表明信息素腺体位于雌性的前胸。这是从 Prioninae 亚科中鉴定出的第二种性引诱剂信息素结构，我们的结果为 Cerambycidae 中的信息素简约性提供了进一步的证据，在这种情况下，它扩展到了亚科和性别线。
