Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China; School of Resource and Environment, Anhui Agricultural University, Hefei 230036, China.
Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China.
J Hazard Mater. 2021 Sep 5;417:125981. doi: 10.1016/j.jhazmat.2021.125981. Epub 2021 May 3.
Ferrous ion was added to the culture solution, followed by the introduction of tetracyclines (TCs), to explore the effect of iron plaque (IP) on the uptake and translocation of TCs by water spinach (Ipomoea aquatic Forsk.). The adsorption amount of TCs on the root surface positively correlated with the amount of IP, except for doxycycline and minocycline. The bioconcentration factor of TCs in roots increased and fitted well with the amount of IP. The concentration of TCs in acrial tissues was three to four orders of magnitude lower than that in roots, and the translocation factor of TCs also fitted well with the amount of IP in a negative linear relationship. Furthermore, IP significantly influenced the metabolism of TCs in water spinach. The accumulation of TC metabolites increased with the increment of IP in roots rather than in acrial tissues, which showed the significance of IP in the metabolism and accumulation of TCs in aquatic plants. Therefore, the metabolism of TCs should not be ignored if IP is induced on the root surface, and the distribution of metabolites should be taken into consideration for the risk assessment and antibiotic pollution control for aquatic plants.
向培养液中添加亚铁离子，随后引入四环素（TCs），以研究铁斑块（IP）对水蕹菜（Ipomoea aquatic Forsk.）吸收和转运 TCs 的影响。TCs 在根表面的吸附量与 IP 量呈正相关，除了强力霉素和美满环素。TCs 在根部的生物浓缩因子增加，并与 IP 量拟合良好。TCs 在地上组织中的浓度比根部低三到四个数量级，TCs 的转运因子也与 IP 量呈负线性关系拟合良好。此外，IP 显著影响水蕹菜中 TCs 的代谢。TC 代谢物的积累随根部 IP 的增加而增加，而不是随地上组织的增加而增加，这表明 IP 在水生植物中 TCs 的代谢和积累方面具有重要意义。因此，如果在根表面诱导形成 IP，则不应忽视 TCs 的代谢，并且在进行水生植物的风险评估和抗生素污染控制时，应考虑代谢物的分布。
