Bioavailability of Soil-Sorbed Tetracycline to Escherichia coli under   Unsaturated Conditions

doi:10.1021/acs.est.7b00590

CORC > 北京大学 > 城市与环境学院

	Bioavailability of Soil-Sorbed Tetracycline to Escherichia coli under Unsaturated Conditions
	Chen, Zeyou ; Zhang, Wei ; Wang, Gang ; Zhang, Yingjie ; Gao, Yanzhen ; Boyd, Stephen A. ; Teppen, Brian J. ; Tiedje, James M. ; Zhu, Dongqiang ; Li, Hui
刊名	ENVIRONMENTAL SCIENCE & TECHNOLOGY
	2017
关键词	ANTIMICROBIAL RESISTANCE GENES NON-XEROPHILIC FUNGI ANTIBIOTIC-RESISTANCE VADOSE ZONE AGRICULTURAL SOILS ORGANIC POLLUTANTS AGAR MEDIA WATER TRANSPORT SORPTION
DOI	10.1021/acs.est.7b00590
英文摘要	Increasing concentrations of anthropogenic, antibiotics in soils [GRAPHIC] are partly responsible for the proliferation of bacterial antibiotic resistance. However, little is known about how soil-sorbed antibiotics exert selective pressure on bacteria in unsaturated soils. This study investigated the bioavailability of tetracycline,sorbed on three soils (Webster clay loam, Capac sandy clay loam, and OShtetim loarny sand) to a fluorescent Escherichia coli biorepoter under unsaturated conditions using agar diffusion assay, microscopic Visualization, and model simulation. Tetracycline sorbed on the soils could be desorbed and become bioavailable to the E. coli cells at matric Water potentials of -2.95 to -13.75 kPa. Bright fluorescent. rings were formed around the tetracycline-loaded soils on the unsaturated agar surfaces, likely due to radial diffusion of tetracycline desorbed from the soils, tetracycline uptake by the E. coli cells, and its inhibition oil E. coli growth, which was supported by the model simulation. :The bioavailability of soil-sorbed tetracycline was Much higher for the Oshtemo soil, probably due to faster diffusion of tetracycline in coarse-textured soils. Decreased bioavailability of soil-sorbed tetracycline at lower soil water potential likely resulted from reduced tetracycline diffusion in soil pore water at smaller matric potential and/or suppressed tetracycline uptake by E. coli at lower osmotic potential. Therefore, soil-sorbed tetracycline could still exert selective pressure gum the exposed bacteria, which was influenced by soil physical processes controlled by soil texture and soil water potential.; National Science Foundation [CBET-1438105]; National Natural Science Foundation of China [21428701, 21225729, 21024093]; National They R&D Program of China [2016YFD0200306]; Chinese Scholarship Council [201306850037]; SCI(E); ARTICLE; 11; 6165-6173; 51
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/472882]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Chen, Zeyou,Zhang, Wei,Wang, Gang,et al. Bioavailability of Soil-Sorbed Tetracycline to Escherichia coli under Unsaturated Conditions[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2017.
APA	Chen, Zeyou.,Zhang, Wei.,Wang, Gang.,Zhang, Yingjie.,Gao, Yanzhen.,...&Li, Hui.(2017).Bioavailability of Soil-Sorbed Tetracycline to Escherichia coli under Unsaturated Conditions.ENVIRONMENTAL SCIENCE & TECHNOLOGY.
MLA	Chen, Zeyou,et al."Bioavailability of Soil-Sorbed Tetracycline to Escherichia coli under Unsaturated Conditions".ENVIRONMENTAL SCIENCE & TECHNOLOGY (2017).