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Distribution and Succession Feature of Antibiotic Resistance Genes Along a Soil Development Chronosequence in Urumqi No. 1 Glacier of China

文献类型： 外文期刊

作者： Shen, Ju-Pei 1 ; Li, Zong-Ming 3 ; Hu, Hang-Wei 4 ; Zeng, Jun 6 ; Zhang, Li-Mei 1 ; Du, Shuai 1 ; He, Ji-Zheng 1 ;

作者机构： 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing, Peoples R China

2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China

3.Yangtze Univ, Coll Anim Sci, Jingzhou, Peoples R China

4.Univ Melbourne, Fac Vet & Agr Sci, Parkville, Vic, Australia

5.Fujian Normal Univ, Sch Geog Sci, Fuzhou, Fujian, Peoples R China

6.Xinjiang Acad Agr Sci, Inst Appl Microbiol, Urumqi, Peoples R China

关键词： antibiotic resistance gene; glacier retreating; primary succession; horizontal gene transfer; mobile genetic element

期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：5.64； 五年影响因子：6.32 ）

ISSN： 1664-302X

年卷期： 2019 年 10 卷

页码：

收录情况： SCI

摘要： Primary succession of plant and microbial communities in the glacier retreating foreland has been extensively studied, but shifts of antibiotic resistance genes (ARGs) with the glacier retreating due to global warming remain elusive. Unraveling the diversity and succession features of ARGs in pristine soil during glacier retreating could contribute to a mechanistic understanding of the evolution and development of soil resistome. In this study, we quantified the abundance and diversity of ARGs along a 50-year soil development chronosequence by using a high-throughput quantitative PCR (HT-qPCR) technique. A total of 24 ARGs and two mobile genetic elements (MGEs) were detected from all the glacier samples, and the numbers of detected ARGs showed a unimodal pattern with an increasing trend at the early stage (0 similar to 8 years) but no significant change at later stages (17 similar to 50 years). The oprJ and mexF genes encoding multidrug resistance were the only two ARGs that were detected across all the succession ages, and the mexF gene showed an increasing trend along the succession time. Structural equation models indicated the predominant role of the intl1 gene encoding the Class 1 integron-integrase in shaping the variation of ARG profiles. These findings suggested the presence of ARGs in pristine soils devoid of anthropogenic impacts, and horizontal gene transfer mediated by MGEs may contribute to the succession patterns of ARGs during the initial soil formation stage along the chronosequence.

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