02/12/2025
Every day, trillions of microscopic plastic particles infiltrate our soil, water, and even our bodies. These silent invaders disrupt ecosystems, harm wildlife, and pose mounting health risks for humans. The truth? Once they’re in the environment, they’re nearly impossible to remove, unless we take bold, science-backed action now.
A study explored how a combination of lemongrass (C. flexuosus) and the plant growth-promoting rhizobacterium M. luteus WN01 clean up soil contaminated with both crude oil and low-density polyethylene (LDPE) microplastics. Over 90 days, the researchers observed that M. luteus significantly enhanced lemongrass plant growth and total petroleum hydrocarbon degradation—by up to 79%—while simultaneously stimulating the partial oxidation and co-metabolic breakdown of LDPE microplastics in the rhizosphere. Despite the presence of microplastics altering root structure and reducing hydrocarbon bioavailability, the lemongrass–M. luteus partnership maintained robust bioremediation performance and clearly benefited lemongrass plant growth and EO production.
Overall, this study demonstrates synergy between lemongrass plants and M. luteus as a highly effective strategy to remove both petroleum hydrocarbons and microplastics from soil. The combination not only detoxifies petroleum pollutants but also initiates biodegradation of persistent plastics—an inspiring model for restoring co-contaminated soils through nature-based, economically valuable solutions.
https://pubmed.ncbi.nlm.nih.gov/41030065/