Lozano Verónica Laura, Alvarez Dalinger Florencia Soledad, Moraña Liliana Beatriz
Consejo Nacional Investigaciones Científicas y Técnicas (CONICET), CCT Salta-Jujuy, Salta 4400, Argentina.
Laboratorio de Calidad de Aguas (LaCA), Facultad de Ciencias Naturales, Universidad Nacional de Salta, Salta 4400, Argentina.
J Xenobiot. 2025 Jun 10;15(3):90. doi: 10.3390/jox15030090.
Imidacloprid, a systemic neonicotinoid insecticide, exerts its neurotoxic effects by binding to nicotinic acetylcholine receptors in the central nervous system. In this study, we examined the effects of commercial imidacloprid formulations on the growth of and other algal species, comparing these responses with those induced by plant hormones. Our results demonstrate that formulated imidacloprid stimulates growth at concentrations as low as 7.82 μM, with a more pronounced effect than certain phytohormones. We observed similar growth-enhancing effects in other algal species exposed to imidacloprid. Notably, pure imidacloprid induced equivalent growth responses in , confirming that the observed stimulation results from the active ingredient itself rather than formulation adjuvants. Given its insecticidal mode of action, potential worst-case aquatic contamination scenarios with imidacloprid may lead to significant increases in algal biomass through both direct (growth stimulation) and indirect (reduction of zooplankton grazing pressure) mechanisms.
吡虫啉是一种内吸性新烟碱类杀虫剂，通过与中枢神经系统中的烟碱型乙酰胆碱受体结合发挥其神经毒性作用。在本研究中，我们检测了市售吡虫啉制剂对[具体藻类名称]及其他藻类生长的影响，并将这些反应与植物激素诱导的反应进行比较。我们的结果表明，配制的吡虫啉在低至7.82 μM的浓度下就能刺激[具体藻类名称]生长，其效果比某些植物激素更显著。我们在接触吡虫啉的其他藻类物种中也观察到了类似的生长促进作用。值得注意的是，纯吡虫啉在[具体藻类名称]中诱导了相同的生长反应，证实观察到的刺激作用是由活性成分本身而非制剂佐剂引起的。鉴于其杀虫作用方式，吡虫啉潜在的最坏情况的水生污染场景可能通过直接（生长刺激）和间接（降低浮游动物放牧压力）机制导致藻类生物量显著增加。
