噬菌体在土壤污染修复中的作用研究进展

Research Progress on the Role of Bacteriophages in Soil Pollution Remediation

  • 摘要: 噬菌体作为土壤微生物群落中丰度最高的类群,既能通过靶向裂解细菌宿主塑造微生物的群落结构,又能通过自身携带的辅助代谢基因调节群落功能。基于噬菌体的生物修复技术因其高度特异性和生态安全性,展现出强化污染土壤修复的独特潜力。然而,目前对于噬菌体在污染土壤修复中的作用机制和应用途径尚未得到系统论述。因此,本论文系统综述了噬菌体强化污染土壤修复的研究进展,并探讨了该技术面临的主要挑战与未来展望。目前,国内外围绕噬菌体在重金属污染、有机物污染及生物污染土壤中的生态功能开展相关研究,揭示了噬菌体增强宿主的污染耐受性、介导关键降解基因水平转移、靶向裂解致病细菌等核心机制。在应用方面,已有研究通过噬菌体展示技术和噬菌体阵列实现重金属和有机污染物的吸附和检测,通过噬菌体移植技术提升有机污染物的降解效率,并通过噬菌体疗法靶向杀灭土壤病原微生物,为土壤污染治理提供了重要的生物修复策略。未来研究应进一步深化噬菌体-微生物-土壤环境互作机制研究,研发高效抗逆的工程噬菌体制剂,构建多技术协同的一体化修复体系,并建立健全相应的生态安全评价系统,以提升噬菌体修复技术在污染土壤修复中的靶向性、有效性与长效性。

     

    Abstract: : Bacteriophages (phages), as the most abundant group in soil microbial communities, could not only shape the microbial community structure by targeted lysis of bacterial hosts, but also regulate community function via phage-encoded auxiliary metabolic genes (AMGs). Phage-based technologies hold great promise for bioremediation of polluted soils because of their high specificity and ecological safety. However, the mechanisms and application pathways of phages in polluted soil remediation have not been comprehensively discussed. Here, we systematically reviewed the research progress on phage-enhanced bioremediation of polluted soils and discussed the major challenges and future perspectives. At present, studies worldwide have investigated the ecological roles of phages in soils contaminated by heavy metals, organic pollutants and soil-borne pathogens, revealing key mechanisms including enhanced host tolerance to pollutants, phage-mediated horizontal transfer of critical degradation genes, and targeted lysis of pathogenic bacteria. In practice, phage display and phage arrays have been developed for adsorption and detection of heavy metals and organic contaminants, phage transplant strategies have been explored to improve the biodegradation of organic pollutants, and phage therapy has been applied to target and eliminate soil-borne pathogens, providing promising bioremediation options for soil pollution control. Future research should further deepen the understanding of the interaction mechanisms among phages, microorganisms, and the soil environment, develop highly stress-resistant engineered phage formulations, construct integrated remediation systems that synergize multiple technologies, and establish comprehensive ecological safety assessment systems. These efforts will enhance the targeting, effectiveness and long-term efficacy of phage-based remediation in polluted soils.

     

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