Exposure of a Tropical Soil to mg/kg of Oxytetracycline Elicits Hormetic Responses in the Catabolic Activities of its Microbial Community
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| Autores: | , , , |
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| Formato: | artículo original |
| Data de Publicação: | 2011 |
| Descrição: | Many farmers in developing countries protect their crops with oxytetracycline and fertilize their farmlands with manure from animals that received this drug as growth promoter. In this study, a tropical soil was exposed to 0.1 mg kg−1, 1 mg kg−1, and 10 mg kg−1 of oxytetracycline for 22 days to evaluate whether this antibiotic alters the capacity of a soil microbial community to metabolize 31 carbon sources. The communities exposed to 1 and 10 mg kg−1 of oxytetracycline exhibited reduced catabolic activities for 3 and 6 substrates, respectively. In contrast, the communities exposed to 0.1 mg kg−1 of oxytetracycline showed higher catabolic activities than the controls and the other two treatments for 19 substrates. These data reveal a hormetic response at the community level not previously described for soil bacteria and oxytetracycline. |
| País: | Kérwá |
| Recursos: | Universidad de Costa Rica |
| Repositorio: | Kérwá |
| OAI Identifier: | oai:kerwa.ucr.ac.cr:10669/74904 |
| Acesso em linha: | http://journals.sagepub.com/doi/10.2203/dose-response.10-045.Rodriguez https://hdl.handle.net/10669/74904 |
| Palavra-chave: | Ecotoxicology Oxytetracycline CLPP Tropical soil Bacteria 631.4 Suelos |