Biphenyl-degrading Bacteria Isolation with Laser Induced Visualized Ejection Separation Technology and Traditional...

Area of Science:

• Environmental Microbiology
• Bioremediation
• Microbial Ecology

Background:

• Polychlorinated biphenyls (PCBs) are persistent organic pollutants.
• Soil contamination poses risks to ecosystems and human health.
• Microbial degradation offers a sustainable remediation strategy.

Purpose of the Study:

• To enrich and identify microorganisms capable of degrading biphenyl from contaminated paddy soil.
• To compare the efficiency of Laser Induced Visualized Ejection Separation Technology (LIVEST) with traditional methods for microbial isolation.
• To discover novel bacterial genera with biphenyl degradation capabilities.

Main Methods:

• Enrichment culture using biphenyl as a sole carbon source.
• High-throughput sequencing for microbial community analysis.
• Single-cell isolation using LIVEST and traditional colony sorting.
• 16S rRNA gene sequencing for genus identification.
• Biphenyl degradation assays for functional verification.

Main Results:

• Microbial community structure significantly shifted during enrichment.
• LIVEST demonstrated superior time-efficiency and target specificity compared to traditional sorting.
• Novel biphenyl-degrading strains were identified within the genera Macrococcus, Aerococcus, and Metabacillus.
• These genera represent previously unreported biphenyl degraders.

Conclusions:

• Microbial enrichment effectively selects for biphenyl-degrading microorganisms.
• LIVEST is a valuable tool for accelerating microbial resource exploration.
• The discovery of biphenyl-degrading Macrococcus, Aerococcus, and Metabacillus expands the known repertoire of bioremediation agents.