Department of Environmental Health Science, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029, Republic of Korea.
Department of Environmental Health Science, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029, Republic of Korea.
Environ Pollut. 2020 Dec;267:115650. doi: 10.1016/j.envpol.2020.115650. Epub 2020 Sep 18.
Although macrophytes are known to play vital roles in aquatic ecosystems, most quantitative aquatic toxicity data focus on fishes, water fleas, or algae, with limited ecotoxicity data published on macrophytes. Salvinia natans is a fast-growing plant commonly found in freshwater habitats. In this study, we verified a suitable disinfectant for preventing foreign contamination and formulated a culture medium for ensuring high productivity of S. natans. Finally, we established methodology for S. natans to be used in ecotoxicity testing of heavy metals and pesticides. As global regulations are being developed to harmonize guidelines and laboratory test species, S. natans is emerging as a potential candidate. The toxicity data publicly available for S. natans are very limited; hence, this study reports an advantageous culturing technique to optimize healthy growth of this species in the laboratory and presents optimal toxicity results, achieved by modifying the currently available test guidelines for Lemna. Our findings expand the currently limited range of test species for aquatic toxicity assays. We conclude that S. natans could serve as a valuable test species for aquatic toxicity assays.
虽然大型水生植物在水生生态系统中起着至关重要的作用，但大多数定量水生毒性数据都集中在鱼类、水蚤或藻类上，有关大型水生植物的生态毒性数据有限。水鳖是一种在淡水生境中生长迅速的植物。在这项研究中，我们验证了一种合适的消毒剂来防止外来污染，并制定了一种培养基，以确保水鳖的高产量。最后，我们建立了水鳖用于重金属和农药生态毒性测试的方法。随着全球法规的制定以协调指导方针和实验室测试物种，水鳖作为一种潜在的候选物种正在出现。目前可获得的有关水鳖的毒性数据非常有限；因此，本研究报告了一种有利的培养技术，可优化该物种在实验室中的健康生长，并通过修改目前可用的浮萍测试指南来提供最佳的毒性结果。我们的研究结果扩展了目前水生毒性测定的测试物种范围有限的现状。我们的结论是，水鳖可以作为水生毒性测定的有价值的测试物种。
