Effects of environmentally relevant concentrations of oxytetracycline and sulfadiazine on the bacterial communities, antibiotic resistance genes, and functional genes are different between maize rhizosphere and bulk soil.

Autor: Zhang Z; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau/College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, Shaanxi, China., Zhao L; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau/College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, Shaanxi, China., Yang J; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau/College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, Shaanxi, China., Pang J; The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, 6009, Australia.; School of Agriculture and Environment, The University of Western Australia, Perth, WA, 6009, Australia., Lambers H; School of Agriculture and Environment, The University of Western Australia, Perth, WA, 6009, Australia.; School of Biological Sciences, The University of Western Australia, Perth, WA, 6009, Australia.; Department of Plant Nutrition, China Agricultural University, Beijing, 100193, China., He H; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau/College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, Shaanxi, China. honghuahe@ms.iswc.ac.cn.; School of Biological Sciences, The University of Western Australia, Perth, WA, 6009, Australia. honghuahe@ms.iswc.ac.cn.; Institute of Soil and Water Conservation, Northwest A&F University, Yangling, 712100, Shaanxi, China. honghuahe@ms.iswc.ac.cn.; Institute of Soil and Water Conservation, Yangling, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, 712100, Shaanxi, China. honghuahe@ms.iswc.ac.cn.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2024 Mar; Vol. 31 (15), pp. 22663-22678. Date of Electronic Publication: 2024 Feb 27.
DOI: 10.1007/s11356-024-32578-6
Abstrakt: Antibiotic contamination in soil has become a major concern worldwide. At present, it is not clear how two co-existed antibiotics with environmentally relevant concentrations would affect soil bacterial community structure, the abundances of antibiotic resistance genes (ARGs) and functional genes, and whether the effects of antibiotics would differ between rhizosphere and bulk soil. We conducted a greenhouse pot experiment to grow maize in a loess soil treated with oxytetracycline (OTC) or sulfadiazine (SDZ) or both at an environmentally relevant concentration (1 mg kg -1 ) to investigate the effects of OTC and SDZ on the rhizosphere and bulk soil bacterial communities, abundances of ARGs and carbon (C)-, nitrogen (N)-, and phosphorus (P)-cycling functional genes, and on plant growth and plant N and P nutrition. The results show that the effects of environmentally relevant concentrations of OTC and SDZ on bacterial communities and abundances of ARGs and functional genes differ between maize rhizosphere and bulk soil. The effects of two antibiotics resulted in a higher absolute abundances of accA, tet(34), tnpA-04, and sul2 in the rhizosphere soil than in the bulk soil and different bacterial community compositions and biomarkers in the rhizosphere soil and the bulk soil. However, OTC had a stronger inhibitory effect on the abundances of a few functional genes in the bulk soil than SDZ did, and their combination had no synergistic effect on plant growth, ARGs, and functional genes. The role of co-existed OTC and SDZ decreased shoot height and increased root N concentration. The results demonstrate that environmentally relevant concentrations of antibiotics shift soil microbial community structure, increase the abundances of ARGs, and reduce the abundances of functional genes. Furthermore, soil contamination with antibiotics can diminish agricultural production via phytotoxic effects on crops, and combined effects of antibiotics on plant growth and nutrient uptake should be considered.
(© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
Externí odkaz: