The investigation aimed to determine the cytogenotoxic effect of fifth-generation quaternary ammonium using three plant species as bioindicators. Bulbs of A. cepa and seeds of L. culinaris and P. sativum were exposed to different concentrations of fifth-generation quaternary ammonium and a control solution of distilled water for 72 h. The results showed that the A. cepa bioindicator presented the greatest reduction in root length at 50 mg L⁻¹ and no mitotic index at 40 and 50 mg L⁻¹, reaching 100% mitotic inhibition. Cell abnormalities were present among the three bioindicator species, where the highest index of micronuclei occurred at 50 mg L⁻¹, being A. cepa the bioindicator with the highest relative rate of abnormality (25.28%). It was concluded that fifth-generation quaternary ammonium, in all treatments, caused a cytogenotoxic effect on the apical meristematic cells of the three species, A. cepa was the most sensitive species.

该调查旨在使用三种植物作为生物指示剂来确定第五代季铵盐的细胞遗传学毒性作用。将洋葱球茎、L. culinaris和P. sativum种子暴露于不同浓度的第五代季铵盐和蒸馏水对照溶液中 72 h。结果表明，A. cepa生物指示剂在 50 mg L ^-1时根长减少最大，在 40 和 50 mg L -1 时没有有丝分裂指数^，达到 100% 有丝分裂抑制。三种生物指示物种类中存在细胞异常，其中微核的最高指数出现在 50 mg L ^-1处，即A. cepa是相对异常率最高的生物指标（25.28%）。得出的结论是，第五代季铵盐在所有处理中均对3个物种的顶端分生细胞产生了细胞毒性作用，其中最敏感的物种是洋葱洋葱。