Phytoremediation is an effective and environmentally friendly approach to treat antibiotic contaminated water, however, the mechanisms of migration and transformation of antibiotics in plant tissues are still far from clear. In this study, the floating macrophyte Eichhornia crassipes was exposed to a series of antibiotic ciprofloxacin (CIP) concentrations. The results showed that the CIP was taken up and accumulated in the roots, which were the major accumulative tissue. CIP content increased with lipid content. During cultivation, the root bioconcentration factor (RCF) gradually increased. The average CIP content detected in aerial parts was 12.80 μg g-1, an order of magnitude lower than in the roots. At low CIP concentrations, the highest leaf bioconcentration factor (LCF) and transfer factor (TF) indicated highly efficient translocation from roots to aerial parts. The soluble protein growth rate of leaves, which is associated with metabolic activity, increased following CIP exposure. Overall, eight major transformation products in E. crassipes tissues were identified, and three possible transformation pathways were proposed involving the processes of desethylation, dehydroxylation, oxidation, hydroxylation and cleavage of the piperazine and quinoline rings. These findings could prove beneficial for improving the management or amelioration methods used for treating water contaminated with antibiotics.

中文翻译：

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抗生素环丙沙星在受污染水的植物修复过程中的迁移和转化产物的鉴定。

植物修复是一种处理抗生素污染水的有效且环保的方法，但是，植物组织中抗生素的迁移和转化机制仍很不清楚。在这项研究中，漂浮的大型植物凤眼兰暴露于一系列抗生素环丙沙星（CIP）浓度。结果表明，CIP被吸收并积累在根中，而根是主要的积累组织。CIP含量随脂质含量增加而增加。在耕种过程中，根部生物富集因子（RCF）逐渐增加。在地上部分检测到的平均CIP含量为12.80μgg-1，比​​根部低一个数量级。在低CIP浓度下，最高的叶片生物富集因子（LCF）和转移因子（TF）表明从根到空中部分的高效转运。CIP暴露后，与代谢活性相关的叶片可溶性蛋白质生长速率增加。总体上，鉴定了八种在大肠杆菌中的主要转化产物，并提出了三种可能的转化途径，涉及哌嗪和喹啉环的脱乙基，脱羟基，氧化，羟基化和裂解过程。这些发现可能证明对改善用于处理被抗生素污染的水的管理或改善方法是有益的。鉴定了十字花孢杆菌组织中的八种主要转化产物，并提出了三种可能的转化途径，涉及哌嗪和喹啉环的脱乙基，脱羟基，氧化，羟基化和裂解过程。这些发现可能证明对改善用于处理被抗生素污染的水的管理或改善方法是有益的。鉴定了十字花孢杆菌组织中的八种主要转化产物，并提出了三种可能的转化途径，涉及哌嗪和喹啉环的脱乙基，脱羟基，氧化，羟基化和裂解过程。这些发现可能证明对改善用于处理被抗生素污染的水的管理或改善方法是有益的。