Functional, genomic, and transcriptomic insights into linear low-density polyethylene (LLDPE) biodegradation by landfill-derived Brucella intermedia.
Zaman I, Moosa MM, Hossain MM
Plastic Degradation
The plastic mulch film blanketing millions of garden beds and farm fields every season doesn't disappear — it fragments into microplastics that persist in soil for decades, and these bacteria hint at a future where biology, not landfills, handles the cleanup.
Researchers scooped soil from a landfill in Bangladesh and found bacteria that can actually eat the type of plastic used in grocery bags, cling wrap, and agricultural films. The bacteria leave visible scratches and chemical changes on the plastic surface — signs they're breaking it down for food. By reading the bacteria's full genetic blueprint, scientists found the specific tools these microbes use to attack and digest plastic.
Key Findings
Two distinct Brucella intermedia strains survived and grew using LLDPE plastic as their sole carbon source under nutrient-limited lab conditions.
FTIR spectroscopy and electron microscopy confirmed physical and chemical degradation of the plastic surface, including new oxidation products, surface roughening, and crack formation.
Whole-genome and transcriptomic analysis identified active expression of genes linked to oxidative activation, polymer breakdown, and biofilm formation during plastic exposure.
chevron_right Technical Summary
Scientists discovered two strains of bacteria found in a Bangladesh landfill that can break down a common plastic used in packaging and agricultural films. The bacteria chemically attack and physically degrade the plastic surface, offering a potential biological route to reducing plastic pollution.
Abstract Preview
The global accumulation of linear low-density polyethylene (LLDPE) waste has created an urgent need for sustainable biodegradation strategies. Here, we report the identification and characterizatio...
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