Effects of Phytoremediation Treatment on Bacterial Community Structure and Diversity in Different Petroleum-Contaminated Soils

Increased exploitation and use of petroleum resources is leading to increased risk of petroleum contamination of soil and groundwater. Although phytoremediation is a widely-used and cost-effective method for rehabilitating soils polluted by petroleum, bacterial community structure and diversity in s...

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Bibliographic Details
Published in:International journal of environmental research and public health 2018-10, Vol.15 (10), p.2168
Main Authors: Shen, Yuanyuan, Ji, Yu, Li, Chunrong, Luo, Pingping, Wang, Wenke, Zhang, Yuan, Nover, Daniel
Format: Article
Language:English
Subjects:
Agropyron
Bacteria - genetics
Biodegradation, Environmental
China
Cynodon
High-Throughput Nucleotide Sequencing
Microbiota
Nitrogen
Petroleum
Petroleum Pollution
Plants
RNA, Ribosomal, 16S
Soil - chemistry
Soil Microbiology
Soil Pollutants
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Summary:Increased exploitation and use of petroleum resources is leading to increased risk of petroleum contamination of soil and groundwater. Although phytoremediation is a widely-used and cost-effective method for rehabilitating soils polluted by petroleum, bacterial community structure and diversity in soils undergoing phytoremediation is poorly understood. We investigate bacterial community response to phytoremediation in two distinct petroleum-contaminated soils (add prepared petroleum-contaminated soils) from northwest China, Weihe Terrace soil and silty loam from loess tableland. High-throughput sequencing technology was used to compare the bacterial communities in 24 different samples, yielding 18,670 operational taxonomic units (OTUs). The dominant bacterial groups, (31.92%), (16.67%), (13.29%) and (6.58%), increased with increasing petroleum concentration from 3000 mg/kg⁻10,000 mg/kg, while (13.58%) and (4.7%) decreased. At the order level, , and except , were dominant in Weihe Terrace soil. Bacterial community structure and diversity in the two soils were significantly different at similar petroleum concentrations. In addition, the dominant genera were affected by available nitrogen, which is strongly associated with the plants used for remediation. Overall, the bacterial community structure and diversity were markedly different in the two soils, depending on the species of plants used and the petroleum concentration.
ISSN:1660-4601
1661-7827
1660-4601
DOI:10.3390/ijerph15102168