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Gene expression during imidacloprid-induced hormesis in green peach aphid

机译：吡虫啉诱导桃蚜中毒作用的基因表达

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摘要

Imidacloprid-induced hormesis in the form of stimulated reproduction has previously been reported in green peach aphid, Myzus persicae. Changes in gene expression accompanying this hormetic response have not been previously investigated. In this study, expression of stress response (Hsp60), dispersal (OSD, TOL and ANT), and developmental (FPPS I) genes were examined for two generations during imidacloprid-induced reproductive stimulation in M. persicae. Global DNA methylation was also measured to test the hypothesis that changes in gene expression are heritable. At hormetic concentrations, down-regulation of Hsp60was followed by up-regulation of this gene in the subsequent generation. Likewise, expression of dispersal-related genes and FPPS I varied with concentration, life stage, and generation. These results indicate that reproductive hormesis in M. persicae is accompanied by a complex transgenerational pattern of up- and down-regulation of genes that likely reflects trade-offs in gene expression and related physiological processes during the phenotypic dose-response. Moreover, DNA methylation in second generation M. persicae occurred at higher doses than in first-generation aphids, suggesting that heritable adaptability to low doses of the stressor might have occurred.
机译：吡虫啉以刺激繁殖的形式引起的兴奋作用，以前在绿色桃蚜Myzus persicae中有报道。此前尚未研究过伴随这种令人发指的反应的基因表达变化。在这项研究中，检查了吡虫啉诱导的吡虫啉诱导的生殖刺激过程中的应激反应（Hsp60），分散（OSD，TOL和ANT）和发育（FPPS I）基因的表达有两个世代。还测量了总体DNA甲基化以检验基因表达变化可遗传的假说。在钟点浓度下，在随后的世代中，Hsp60被下调，随后该基因被上调。同样，与分散有关的基因和FPPS I的表达随浓度，生命阶段和世代而变化。这些结果表明，桃蚜的生殖兴奋伴随着基因上调和下调的复杂的跨代模式，这可能反映了表型剂量反应中基因表达和相关生理过程之间的权衡。此外，与第一代蚜虫相比，第二代桃蚜的DNA甲基化剂量更高，这表明可发生对低剂量应激源的遗传适应性。

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