Rice paddy bacteria fully digest toxic petroleum pollutants in days
Ananthalekshmi LP, Unnikrishnan B, Theresa M, Varghese RR, Rosario LLD
Phytoremediation
Old industrial lots, gas station runoff, and even some garden soil near roads can carry these same carcinogenic hydrocarbons, so a microbe that eats them without needing harsh chemical treatment matters for anyone trying to reclaim contaminated ground into growing space.
Scientists found a bacterium living in rice paddy soil that can eat three nasty pollution compounds found in oil and coal tar, breaking them down almost completely in three to five days. They figured out exactly which genes and chemical steps the microbe uses to pull apart these tough ring-shaped molecules. That roadmap could help engineer better cleanup tools for contaminated soil and water in the future.
Key Findings
Priestia aryabhattai strain BMRS3B tolerated and degraded naphthalene, phenanthrene, and fluorene at concentrations up to 100 mg/mL, completely breaking them down within 72-120 hours.
GC-MS analysis identified key breakdown intermediates including dibutyl phthalate and several phthalate esters, mapping the degradation pathway.
Whole genome sequencing revealed genes for ring-cleaving dioxygenases, catechol 2,3-dioxygenase, and cytochrome P450 monooxygenases that drive aromatic ring breakdown.
chevron_right Technical Summary
A soil bacterium found in rice paddies can fully break down toxic petroleum pollutants called PAHs within a few days, turning them into harmless byproducts. Researchers mapped its genes and chemical pathways, showing it's a strong candidate for cleaning up oil-contaminated soil and water.
Abstract Preview
Original paper
Integrated metabolomic and whole genomic profiling for unravelling the biodegradation mechanism of polycyclic aromatic hydrocarbons by the paddy rhizobacteria: Priestia aryabhattai BMRS3B.
Polycyclic Aromatic Hydrocarbons (PAHs) are hazardous organic pollutants known for their extreme toxic implications to living beings. Their potential carcinogenicity is the major problem related to...
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