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Uptake of polystyrene nanospheres by wheat and Arabidopsis roots in agar, hydroponics, and soil
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Researchers studied the uptake of polystyrene nanoplastic particles by wheat and Arabidopsis roots across three growing systems: agar, hydroponics, and soil. The study found that plant roots can absorb nanoplastic particles, raising concerns about food chain contamination. The findings suggest that nanoplastics in agricultural soils may enter food crops and ultimately reach human consumers.
Plant uptake of micro- and nanoplastics can lead to contamination of food with plastic particles and subsequent human consumption of plastics.
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Polystyrene nano- and microplastic accumulation at Arabidopsis and wheat root cap cells, but no evidence for uptake into roots
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Researchers investigated whether polystyrene nano- and microplastics can be taken up by the roots of Arabidopsis and wheat plants. They found that plastic particles accumulated at root cap cells on the outer surface of roots but found no evidence that the particles were actually taken up into root tissues. The study suggests that while plastic particles associate with plant roots, they may not easily enter the plant itself through this pathway.
Uptake and translocation of polystyrene nanoplastics in edible plants via root and foliar exposure: A qualitative imaging-based study
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Researchers examined the uptake and movement of polystyrene nanoplastics in lettuce, carrot, and wheat following root and foliar exposure using confocal and electron microscopy. The study found that nanoplastics were internalized in root, stem, and leaf tissues of all three species, with lettuce showing the most extensive systemic transport including bidirectional movement, raising potential concerns for human exposure through crop consumption.
Uptake and translocation of nano/microplastics by rice seedlings: Evidence from a hydroponic experiment
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In a hydroponic experiment, researchers showed that both nano-sized (80 nm) and micro-sized (1 micrometer) polystyrene particles were absorbed by rice plant roots and transported up into stems and leaves. The particles traveled through the plant's vascular system and accumulated in cell walls and between cells. This finding is concerning because it demonstrates that microplastics in soil and water can enter food crops like rice and potentially reach people through their diet.
Uptake and distribution of microplastics of different particle sizes in maize (Zea mays) seedling roots
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Researchers studied how maize seedling roots take up polystyrene microplastic beads of different sizes and found that smaller particles were absorbed more readily than larger ones. Particles as small as 0.2 micrometers were detected in both roots and shoots, with the root tip being the primary uptake zone. The findings confirm that microplastics can enter food crops through their root systems, raising questions about food safety.
Accumulation of nanoplastics by wheat seedling roots: Both passive and energy-consuming processes
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This study investigated how wheat seedling roots absorb and transport polystyrene and PVC nanoplastics, finding that uptake occurred through both passive (energy-independent) and active (energy-consuming) processes. Root uptake efficiency varied by particle type and size, with implications for nanoplastic entry into the food chain via crop plants.
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