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Xing J, Sun S, Wang H, Brookes PC, Xu J. Response of soil native microbial community to Eschericia coli O157:H7 invasion. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 261:114225. [PMID: 32220754 DOI: 10.1016/j.envpol.2020.114225] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 01/31/2020] [Accepted: 02/16/2020] [Indexed: 06/10/2023]
Abstract
The presence of Eschericia coli O157:H7 in the natural environment is a serious threat to human health. The native microbial community in soil plays an important role in resisting E. coli O157:H7 invasion. This study examined the responses of soil microbial community to E. coli O157:H7 invasion during a 32-day incubation. The E. coli O157:H7 persisted longer in γ-irradiated soil than non-irradiated soil while glucose addition decreased its persistence in the irradiated soil which was associated with an increasing recovery of the native community. The invasion of E. coli O157:H7 increased soil organic carbon mineralization, an indicator of microbial activity, in both non-irradiated and irradiated soils, while glucose addition significantly promoted the carbon mineralization process. The 16S rRNA sequencing data showed the gradual recovery of the native bacterial population including specific taxa such as proteobacteria and actinobacteria following irradiation. It is concluded that soil microbial function and structure can affect persistence of E. coli O157:H7 and that lower biodiversity of the native community favors its persistence.
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Affiliation(s)
- Jiajia Xing
- Institute of Soil and Water Resources and Environmental Science, College of Environment and Resource Sciences, Zhejiang University, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Substrates and Environment, Zhejiang University, Hangzhou, 310058, China
| | - Shanshan Sun
- Institute of Soil and Water Resources and Environmental Science, College of Environment and Resource Sciences, Zhejiang University, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Substrates and Environment, Zhejiang University, Hangzhou, 310058, China
| | - Haizhen Wang
- Institute of Soil and Water Resources and Environmental Science, College of Environment and Resource Sciences, Zhejiang University, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Substrates and Environment, Zhejiang University, Hangzhou, 310058, China
| | - Philip C Brookes
- Institute of Soil and Water Resources and Environmental Science, College of Environment and Resource Sciences, Zhejiang University, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Substrates and Environment, Zhejiang University, Hangzhou, 310058, China
| | - Jianming Xu
- Institute of Soil and Water Resources and Environmental Science, College of Environment and Resource Sciences, Zhejiang University, Hangzhou, 310058, China; Zhejiang Provincial Key Laboratory of Agricultural Substrates and Environment, Zhejiang University, Hangzhou, 310058, China.
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