土霉素
毒性
孵化
化学
金霉素
土壤水分
抗生素
环境化学
细菌生长
动物科学
潜伏期
食品科学
细菌
生物
生物化学
生态学
遗传学
有机化学
作者
Vanesa Santás-Miguel,Manuel Arias‐Estévez,Montserrat Díaz-Raviña,María J. Fernández‐Sanjurjo,Esperanza Álvarez‐Rodríguez,Avelino Núñez‐Delgado,David Fernández‐Calviño
出处
期刊:Agronomy
[Multidisciplinary Digital Publishing Institute]
日期:2020-07-14
卷期号:10 (7): 1011-1011
被引量:26
标识
DOI:10.3390/agronomy10071011
摘要
Toxicity on soil bacterial community growth caused by the antibiotics oxytetracycline (OTC) and chlortetracycline (CTC) was studied in 22 agricultural soils after 1, 8 and 42 incubation days. The leucine incorporation method was used with this aim, estimating the concentration of each antibiotic which caused an inhibition of 50% in bacterial community growth (log IC50). For OTC, the mean log IC50 was 2.70, 2.81, 2.84 for each of the three incubation times, while the values were 2.05, 2.22 and 2.47 for CTC, meaning that the magnitude of OTC toxicity was similar over time, whereas it decreased significantly for CTC with incubation time. In addition, results showed that the toxicity on bacterial community growth due to CTC is significantly higher than when due to OTC. Moreover, the toxicity on bacterial community growth due to both antibiotics is dependent on soil properties. Specifically, an increase in soil pH and silt content resulted in higher toxicity of both antibiotics, while increases in total organic carbon and clay contents caused decreases in OTC and CTC toxicities. The results also show that OTC toxicity can be well predicted by means of specific equations, using the values of pH measured in KCl and those of effective cation exchange capacity as input variables. CTC toxicity may be predicted (but with low precision) using pH measured in KCl and total organic carbon. These equations may help to predict the negative effects caused by OTC and CTC on soil bacteria using easily measurable soil parameters.
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