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Sublethal Exposure to Cadmium Induces Chemosensory Dysfunction in Fire Ants

文献类型: 外文期刊

作者: Yang, Fuxiang 1 ; Zhang, Guoqing 1 ; Liu, Jinlong 1 ; Duan, Shuanggang 1 ; Li, Lei 2 ; Lu, Yongyue 3 ; Wang, Man-Qun 1 ; Zhou, Aiming 1 ;

作者机构: 1.Huazhong Agr Univ, Coll Plant Sci & Technol, Hubei Insect Resources Utilizat & Sustainable Pest, Wuhan 430070, Peoples R China

2.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Haikou 571101, Peoples R China

3.South China Agr Univ, Dept Entomol, Guangzhou 510642, Peoples R China

关键词: Cd exposure; odor binding protein expression; electrophysiological and behavioral response; chemosensory dysfunction; social behavior

期刊名称:ENVIRONMENTAL SCIENCE & TECHNOLOGY ( 影响因子:11.357; 五年影响因子:12.154 )

ISSN: 0013-936X

年卷期: 2022 年 56 卷 17 期

页码:

收录情况: SCI

摘要: Ants easily accumulate cadmium (Cd) from the food web in terrestrial ecosystems. Cd contamination may cause olfactory dysfunction and consequently disorders in the social behavior of ants. To explore the molecular mechanism underlying the effect of Cd exposure on the chemosensory process of ants, we characterized the Cd-induced variations in the expression of genes involved in chemoreception and electrophysiological and behav-ioral sensitivity to semiochemicals by using the red imported fire ant, Solenopsis invicta, as a model system. As a result, Cd exposure increased Cd accumulation and decreased the survival rate of S. invicta. Cd exposure altered the expression profiles of odor binding protein genes of S. invicta (SiOBPs). Specifically, SiOBP15 protein expression was upregulated upon Cd exposure. Both SiOBP7 and SiOBP15 exhibited high binding affinities to limonene, nonanal, and 2,4,6-trimethylpyridine. S. invicta exposed to Cd showed less sensitive electrophysiological and behavioral response to the three chemicals but exhibited sensitive perception to undecane. Silencing of SiOBP7 and SiOBP15 abolished the behavioral response of S. invicta to nonanal and undecane, respectively, suggesting that SiOBP7 and SiOBP15 play essential roles in the chemoreception of S. invicta. In general, our results suggest that Cd contamination may interfere with olfactory signal transduction by altering the expression of SiOBPs, consequently evoking chemosensory dysfunction in fire ants.

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