Long-term organic fertilization increased antibiotic resistome in phyllosphere of maize

文献类型： 外文期刊

第一作者： Chen, Qing-Lin

作者： Chen, Qing-Lin;An, Xin-Li;Zheng, Bang-Xiao;Su, Jian-Qiang;Zheng, Bang-Xiao;Ma, Yi-Bing

作者机构：

关键词： Antibiotic resistance; Phyllosphere; Sludge; Chicken manure; Leaf-microbiome

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）

ISSN： 0048-9697

年卷期： 2018 年 645 卷

页码：

收录情况： SCI

摘要： Phyllosphere contains various microorganisms that may harbor diverse antibiotic resistance genes (ARGs). However, we know little about the composition of antibiotic resistome and the factors influencing the diversity and abundance of ARGs in the phyllosphere. In this study, 16S rRNA gene amplicon sequencing and high-throughput quantitative PCR approaches were employed to investigate the effects of long-term (over 10 years) organic fertilization on the phyllosphere bacterial communities and antibiotic resistome. Proteobacteria, Bacteroidetes, Actinobacteria and Firmicutes dominated in the phyllosphere bacterial communities. Long-term application of sewage sludge and chicken manure altered the phyllosphere bacterial community composition, with a remarkable decrease in bacterial alpha-diversity. A total of 124 unique ARGs were detected in the phyllosphere. The application of sewage sludge and chicken manure significantly increased the abundance of ARGs, with a maximum 2638-fold enrichment. Variation partitioning analysis (VPA) together with network analysis indicated that the profile of ARGs is strongly correlated with bacterial community compositions. These results improve the knowledge about the diversity of plant-associated antibiotic resistome and factors influencing the profile of ARGs in the phyllosphere. (C) 2018 Elsevier B.V. All rights reserved.

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