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Synthetic DNA fragments as ultra-high-resolution multitracers to quantify transport behavior of micro- and nanoplastics in plant systems
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Scientists used a clever DNA-tagging trick to track exactly how tiny plastic particles move into lettuce plants, through water, air, and soil. They found that watering plants with plastic-contaminated water was the biggest source of contamination, and that smaller plastic particles (200 nanometers) traveled more easily into the edible leafy parts than larger ones, especially when plants "sweat" more (higher transpiration). This matters because it helps explain how microplastics end up in the food we eat, and suggests that both irrigation water quality and plant growing conditions could influence how much plastic ends up on our plates.
Although plant uptake of micro- and nanoplastics (MNPs) has been well documented, accurately identifying MNP sources and tracking their transport within plants remain major challenges, primarily due to the lack of effective multisource tracing technologies. To fill this gap, we established an ultra-high-resolution multisource tracing approach by encapsulating sequence-specific synthetic DNA fragments into MNPs, followed by quantification of their transport using quantitative real-time PCR (qPCR) in controlled lettuce cultivation experiments. This approach enables the quantification of source-specific MNP contributions in plants, while providing quantitative evidence for size-dependent transport behavior and the involvement of transpiration in MNP uptake. High transpiration (VPD = 2.12 kPa) resulted in 10-fold and 20-fold elevations in the MNP bioconcentration factor (BCF) and translocation factor (TF) of lettuce, respectively, compared with low transpiration (VPD = 0.34 kPa). Size-dependent accumulation of MNPs was observed: 200 nm particles exhibited higher BCF and greater TF than 700 nm particles. Smaller particles were preferentially translocated to shoots, while larger ones were retained in roots. Irrigation represented the predominant pathway of MNP uptake (BCF = 1.5 × 10 –2 ), showing higher accumulation than both the atmosphere (BCF = 2.2 × 10 –3 ) and the substrate (BCF = 4.9 × 10 –4 ). The observed patterns also support that atmospherically deposited MNPs penetrate plant tissues through leaf stomata. The findings validate the effectiveness of the synthetic DNA-based labeling approach, providing critical quantitative data to advance our understanding of interaction mechanisms between MNPs and plants.
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Dataset for Synthetic DNA Fragments as Ultra-High-Resolution Multitracers to Quantify Transport Behavior of Micro- and Nanoplastics in Plant Systems
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Scientists developed a clever tracking tool, tiny synthetic DNA tags attached to micro- and nanoplastic particles, to precisely follow how these tiny plastic bits move into and through plants, from roots to leaves. This matters because plants are a major entry point for plastics into our food supply, and better tracking tools like this one help researchers figure out exactly how much plastic ends up in the foods we eat, which is a key step toward understanding potential risks to human health.
Dataset for Synthetic DNA Fragments as Ultra-High-Resolution Multitracers to Quantify Transport Behavior of Micro- and Nanoplastics in Plant Systems
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Scientists developed a clever new tool that uses tiny, custom-made DNA tags to track exactly how microscopic plastic particles move through plants, from their roots up into stems and leaves. This matters because plants are a major pathway for plastic pollution to enter our food supply, and this precise tracking method could help researchers finally understand how much plastic ends up in the fruits and vegetables we eat. This dataset itself is mainly technical groundwork (testing the tool's accuracy and reliability), setting the stage for future studies on food safety and human exposure.
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Scientists used special glow-in-the-dark materials to track how microplastics move through lettuce plants, from roots up to stems and leaves. This matters because it confirms plants can absorb and transport microplastics internally, meaning these tiny plastic particles could end up in the produce we eat, though the researchers note their method can't yet tell whether it's tracking whole plastic particles or just fragments that broke off. This new tracking tool could help future studies better understand exactly how much plastic ends up in our food.
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Scientists have developed a better way to track how tiny plastic particles move through plants—from roots to leaves—by using special glowing chemical tags that don't get washed out by the plant's natural background glow, unlike older tracking methods. This matters because microplastics in our food supply are a growing concern, and understanding exactly how they get into the crops we eat (like wheat and lettuce) is a key step toward figuring out whether—and how much—they end up on our dinner plates.
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Researchers developed a new method using europium-tagged nanoplastics to precisely measure how 200-nanometer plastic particles are taken up by wheat and lettuce plants. The nanoplastics accumulated mainly in the roots, with a small but measurable amount transported to the shoots that people eat. This study confirms that food crops can absorb nanoplastics from contaminated soil, providing a direct pathway for these particles to enter the human diet.
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