Laboratório de Fisiologia de Plantas sob Estresse, Departamento de Botânica, Setor de Ciências Biológicas, Universidade Federal do Paraná, Centro Politécnico, Avenida Coronel Francisco H. dos Santos, 100, Jardim das Américas, C.P. 19031, 81531-980 Curitiba, Paraná, Brazil.
Laboratório de Anatomia e Biomecânica Vegetal, Departamento de Botânica, Setor de Ciências Biológicas, Universidade Federal do Paraná, Centro Politécnico, Avenida Coronel Francisco H. dos Santos, 100, Jardim das Américas, C.P. 19031, 81531-980 Curitiba, Paraná, Brazil.
J Hazard Mater. 2021 Sep 5;417:125694. doi: 10.1016/j.jhazmat.2021.125694. Epub 2021 Mar 20.
We evaluate the isolated and combined effects of glyphosate and its by-product aminomethylphosphonic acid (AMPA) and the potential of the aquatic macrophyte Salvinia molesta to remove these chemicals from contaminated water. Plants were exposed to environmentally relevant concentrations of glyphosate (0, 20, 40, 60, 80 and 100 µg l) or AMPA (0, 10, 20, 30, 40 and 50 µg l) for seven days. Then, based on the effective concentrations of glyphosate found to reduce photosynthetic rates by 10% (EC) and 50% (EC), the plants were exposed to combinations of 0, 16 and 63.5 µg glyphosate l and 0, 5, 15, 25 µg AMPA l. The EC and EC were lower for AMPA (6.1 µg l and 28.4 µg l respectively) than for glyphosate (16 and 63.5 µg glyphosate l respectively). When occurring together, the deleterious effects of those chemicals to plants increased. S. molesta plants removed up to 74.15% of glyphosate and 71.34% of AMPA from culture water. Due to its high removal efficiency, S. molesta can be used in phytoremediation programs. It will be important to evaluate the combined effects of glyphosate and AMPA in any toxicological studies of the herbicide.
我们评估了草甘膦及其副产物氨甲基膦酸（AMPA）的单独和联合效应，以及水培植物满江红去除受污染水中这些化学物质的潜力。植物在环境相关浓度的草甘膦（0、20、40、60、80 和 100μg/L）或 AMPA（0、10、20、30、40 和 50μg/L）中暴露七天。然后，基于发现降低光合作用率 10%（EC）和 50%（EC）的草甘膦有效浓度，植物暴露于 0、16 和 63.5μg/L 草甘膦和 0、5、15、25μg/L AMPA 的组合中。与草甘膦（分别为 6.1μg/L 和 28.4μg/L）相比，AMPA 的 EC 和 EC 较低（分别为 6.1μg/L 和 28.4μg/L）。当它们一起发生时，这些化学物质对植物的有害影响增加。满江红植物从培养液中去除了高达 74.15%的草甘膦和 71.34%的 AMPA。由于其高效的去除效率，满江红可以用于植物修复计划。在任何关于除草剂的毒理学研究中，评估草甘膦和 AMPA 的联合效应将非常重要。
