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Combined effects of microplastics and organic pollutants on crops: a meta-analysis
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Tiny plastic particles in soil don't just harm crops on their own, when combined with things like antibiotics or pesticides, they can shrink plant growth and cause crops to soak up nearly twice as much antibiotic residue in their edible parts. Since this study used lab experiments with higher-than-typical pollutant levels over short time periods, more real-world research is needed, but the findings raise a flag: microplastic pollution in farm soil could be making other chemical contaminants in our food worse, not just adding a separate problem.
Microplastics (MPs) and organic pollutants (OPs) are widespread environmental contaminants, yet their combined effects on agricultural systems remain poorly understood. This meta-analysis synthesizes 884 observations from 38 peer-reviewed studies to evaluate co-exposure impacts-specifically with antibiotics, pesticides, and polycyclic aromatic hydrocarbons (PAHs) -on crop biomass and pollutant accumulation. A systematic search of Web of Science and CNKI (up to September 30, 2025) identified controlled experiments comparing OPs-only with combined MPs-OPs treatments (≥ 3 replicates; extractable data). Publication bias was assessed via funnel plots and Egger’s test. Using random-effects models, MPs combined with antibiotics or pesticides significantly reduced aboveground biomass, whereas MPs-PAHs effects were neutral. Notably, antibiotic accumulation in aboveground tissues increased by 94.53%. Model selection based on summed Akaike weights indicated that, among the moderators examined, crop species received the highest relative importance for aboveground biomass and pollutant uptake, while MP particle size and cultivation duration showed strong associations with belowground biomass and belowground accumulation, respectively. Limitations include the overrepresentation of antibiotic studies, the predominance of short-term controlled-exposure experiments, and the use of relatively high exposure concentrations, which together constrain extrapolation to long-term field conditions. These findings should therefore be interpreted as patterns emerging from the current body of experimental evidence rather than as universal ecological responses, highlighting the need for further studies under environmentally relevant conditions and extended field observations.
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A study found that when soil is contaminated with both microplastics and antibiotics together, the damage to wheat and maize seedlings is worse than from either contaminant alone, with increased root oxidative stress and disrupted soil bacterial communities. This combined contamination, common in agricultural soils treated with plastic mulch and livestock manure, could affect crop health and food quality.
Coupling polyethylene microplastics with other pollutants: Exploring their combined effects on plant health and technologies for mitigating toxicity
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This review summarizes how polyethylene microplastics interact with other common soil pollutants like heavy metals and antibiotics in agricultural fields. Microplastics can absorb these pollutants and carry them into plants, making the combined exposure more harmful than either pollutant alone. The findings raise concerns about the safety of crops grown in microplastic-contaminated soil.
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Scientists found that when tiny plastic particles and a common antibiotic mix together in soil, they disrupt beneficial microbes around wheat roots more than either pollutant does alone. This matters because healthy soil microbes help crops grow and cycle nutrients, so this combined pollution could quietly affect food production as both microplastics and pharmaceuticals build up in farmland over time.
Polystyrene nanoplastics increase tetracycline residues while aggravating nutrient dysregulation and ultrastructural damage in the roots of Chrysanthemum coronarium L.
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Scientists found that when tiny plastic particles (nanoplastics) and a common antibiotic (tetracycline) show up together in soil, the plastic causes edible plants like garland chrysanthemum to absorb and hold onto more of the antibiotic residue in their roots. This combo also damaged the plant's root cells and reduced important nutrients like potassium, calcium, and iron. Since these pollutants often mix in real-world farming environments, this matters because it suggests microplastic pollution could make antibiotic contamination in our food worse while also making crops less nutritious.
Co-exposure to microplastics and soil pollutants significantly exacerbates toxicity to crops: Insights from a global meta and machine-learning analysis
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A large-scale analysis of 68 studies found that when microplastics combine with other soil pollutants, the harm to crops is significantly worse than from the other pollutants alone. Microplastics intensified damage to plant growth, increased oxidative stress, and reduced photosynthesis efficiency. Interestingly, microplastics did reduce the amount of other pollutants that accumulated in the crops, but the overall toxic effects on plant health were still greater.
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