RT Journal Article
T1 Time-course evolution of bacterial community tolerance to tetracycline antibiotics in agricultural soils: A laboratory experiment
A1 Santás Miguel, Vanesa
A1 Rodríguez González, Laura
A1 Núñez Delgado, Avelino
A1 Álvarez Rodríguez, Esperanza
A1 Díaz Raviña, Montserrat
A1 Arias Estévez, Manuel
A1 Fernández Calviño, David
K1 Bacterial growth
K1 Bacterial tolerance
K1 Chlortetracycline
K1 Oxytetracycline
K1 PICT
K1 Tetracycline
AB The presence of antibiotics in soils may increase the selection pressure on soil bacterial communities and cause tolerance to these pollutants. The temporal evolution of bacterial community tolerance to different concentrations of tetracycline (TC), oxytetracycline (OTC) and chlortetracycline (CTC) was evaluated in two soils. The results showed an increase of soil bacterial community tolerance to TC, CTC and OTC only in samples polluted with the highest antibiotic concentrations tested (2000 mg kg−1). The magnitude of those increases was higher in the soil with the lower organic carbon content (1.6%) than in the soil with an organic carbon content reaching 3.4%. In the soil with low organic carbon content, the time-course evolution showed a maximum increase in the tolerance of bacterial communities to tetracycline antibiotics between 45 and 100 incubation days, while for longer incubation times (360 days) the tolerance decreased. In the soil with high organic carbon content, a similar behavior was found for OTC. However, for CTC and TC, slightly increases and decreases (respectively) were found in the bacterial community tolerance at intermediate incubation times, followed by values close to zero for TC after 360 days of incubation, while for CTC they remained higher than in the control. In conclusion, soil pollution due to tetracyclines may cause bacterial community tolerance to these antibiotics when present at high concentrations. In addition, the risk is higher in soils with low organic matter content, and it decreases with time.
PB Elsevier
SN 0045-6535
YR 2022
FD 2022
LK https://hdl.handle.net/10347/38498
UL https://hdl.handle.net/10347/38498
LA eng
NO Santás-Miguel, V., Rodríguez-González, L., Núñez-Delgado, A., Álvarez-Rodríguez, E., Díaz-Raviña, M., Arias-Estévez, M., & Fernández-Calviño, D. (2022). Time-course evolution of bacterial community tolerance to tetracycline antibiotics in agricultural soils: A laboratory experiment. Chemosphere (Oxford), 291(Pt 1), 13-9. https://doi.org/10.1016/j.chemosphere.2021.132758
NO This study has been funded by the Spanish Ministry of Economy and Competitiveness through the projects CGL 2015-67333-C2-1-R and -2-R (FEDER Funds) and by Xunta de Galicia via BV1 research group (ED431C 2017/62-GRC). David Fernández Calviño holds a Ramón y Cajal contract (RYC-2016-20411) financed by the Spanish Ministry of Economy, Industry and Competitiveness. Vanesa Santás-Miguel and Laura Rodríguez González holds a pre-doctoral fellowship (ED481A- 2020/089 and ED481A-2021/309, respectively) financed by Xunta de Galicia.
DS Minerva
RD 28 abr 2026