生物强化
生物修复
环境修复
生物刺激
微观世界
植物修复
总石油烃
微生物联合体
污染物
石油
环境化学
碳氢化合物
环境科学
柴油
土壤污染
微生物
生物
污染
化学
废物管理
细菌
生态学
工程类
重金属
遗传学
有机化学
古生物学
作者
Michael O. Eze,Volker Thiel,Grant C. Hose,Simon C. George,Rolf Daniel
出处
期刊:Chemosphere
[Elsevier]
日期:2022-02-01
卷期号:289: 133143-133143
被引量:18
标识
DOI:10.1016/j.chemosphere.2021.133143
摘要
The slow rate of natural attenuation of organic pollutants, together with unwanted environmental impacts of traditional remediation strategies, has necessitated the exploration of plant-microbe systems for enhanced bioremediation applications. The identification of microorganisms capable of promoting rhizoremediation through both plant growth-promoting and hydrocarbon-degrading processes is crucial to the success and adoption of plant-based remediation techniques. In this study, through successive enrichments of soil samples from a historic oil-contaminated site in Wietze, Germany, we isolated a plant growth-promoting and hydrocarbon-degrading bacterial consortium dominated by Alphaproteobacteria. In microcosm experiments involving Medicago sativa L. and the isolated bacterial consortium, we examined the ability of the consortium to enhance rhizoremediation of petroleum hydrocarbons. The inoculation of M. sativa with the consortium resulted in 66% increase in plant biomass, and achieved a 91% reduction in diesel fuel hydrocarbon concentrations in the soil within 60 days. Metagenome analysis led to the identification of genes and taxa putatively involved in these processes. The majority of the coding DNA sequences associated with plant growth promotion and hydrocarbon degradation in this study were affiliated to Acidocella aminolytica and Acidobacterium capsulatum indicating their potential for biotechnological applications in the rhizoremediation of sites contaminated by petroleum-derived organic pollutants.
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