Phytotoxicity of veterinary antibiotics to seed germination and root elongation of crops
Publication in refereed journal

香港中文大學研究人員

引用次數
替代計量分析
.

其它資訊
摘要Large quantities of veterinary antibiotics (VAs) are being used worldwide in agricultural fields through wastewater irrigation and manure application. They cause damages to the ecosystem when discharged into the environment, but there is a lack of information on their toxicity to plants and animals. This study evaluated the phytotoxic effects of five major VAs, namely tetracycline (TC), sulfamethazine (SMZ), norfloxacin (NOR), erythromycin (ERY) and chloramphenicol (CAP), on seed germination and root elongation in lettuce, tomato, carrot and cucumber, and investigated the relationship between their physicochemical properties and phytotoxicities. Results show that these compounds significantly inhibited root elongation (p < 0.05), the most sensitive endpoint for the phytotoxicity test. TC was associated with the highest level of toxicity, followed by NOR, ERY, SMZ and CAP. Regarding crop species, lettuce was found to be sensitive to most of the VAs. The median effect concentration (EC50) of TC, SMZ, NOR, ERY and CAP to lettuce was 14.4,157, 49.4, 68.8 and 204 mg/L, respectively. A quantitative structure activity relationship (QSAR) model has been established based on the measured data. It is evident that hydrophobicity was the most important factor governing the phytotoxicity of these compounds to seeds, which could be explained by the polar narcosis mechanism. Lettuce is considered a good biomarker for VAs in the environment. According to the derived equation, phytotoxicities of selected VA compounds on different crops can be calculated, which could be applicable to other.VAs. Environmental risks of VAs were summarized based on the phytotoxicity results and other persistent factors. (C) 2015 Elsevier Inc. All rights reserved.
著者Pan M, Chu LM
期刊名稱Ecotoxicology and Environmental Safety
出版年份2016
月份4
日期1
卷號126
出版社ACADEMIC PRESS INC ELSEVIER SCIENCE
頁次228 - 237
國際標準期刊號0147-6513
電子國際標準期刊號1090-2414
語言英式英語
關鍵詞Edible crops; Phytotoxicity; Root elongation; Seed germination; Veterinary antibiotics
Web of Science 學科類別Environmental Sciences; Environmental Sciences & Ecology; Toxicology

上次更新時間 2021-21-02 於 01:14