Does multigenerational exposure to hormetic concentrations of imidacloprid precondition aphids for increased insecticide tolerance?
| Autor: | G. Christopher Cutler, Rachel R. Rix |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine Aphid biology Offspring Hormesis food and beverages General Medicine biology.organism_classification 01 natural sciences Toxicology 010602 entomology 03 medical and health sciences Nicotinic acetylcholine receptor chemistry.chemical_compound 030104 developmental biology Nicotinic agonist chemistry Imidacloprid Insect Science parasitic diseases Myzus persicae Mode of action Agronomy and Crop Science |
| Zdroj: | Pest Management Science. 74:314-322 |
| ISSN: | 1526-498X |
| DOI: | 10.1002/ps.4731 |
| Popis: | BACKGROUND Hormetic preconditioning, whereby exposure to mild stress primes an organism to better tolerate subsequent stress, is well documented. It is unknown if exposure to hormetic concentrations of insecticide can trans-generationally prime insects to better tolerate insecticide exposure, or whether exposure to hormetic concentrations of insecticide can induce mutations in genes responsible for insecticide resistance. Using the aphid Myzus persicae (Sulzer) and insecticide imidacloprid as a model, we examined if exposure to mildly toxic and hormetic concentrations of imidacloprid reduced aphid susceptibility to insecticides across four generations, and whether such exposures induced mutations in the imidacloprid binding site in post-synaptic nicotinic acetylcholine receptors. RESULTS Chronic, multigenerational exposure of aphids to hormetic concentrations of imidacloprid primed offspring to better survive exposure to certain concentrations of imidacloprid, but not exposure to spirotetramat, an insecticide with a different mode of action. Exposure to hormetic and mildly toxic concentrations of imidacloprid did not result in mutations in any of the examined nicotinic acetylcholine receptor subunits. CONCLUSION Our findings demonstrate that exposure to hormetic concentrations of insecticide can prime insects to better withstand subsequent chemical stress, but this is dependent upon the insecticide exposure scenario, and may be subtle over generations. |
| Databáze: | OpenAIRE |
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