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Tracking the translocation of nanoplastics from soil to plant: Comparison of different analytical techniques
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This study compared different lab techniques for tracking nanoplastics as they move from soil into wheat plants. Researchers found that wheat seedlings absorbed enormous quantities of nanoplastics through their roots in just five days, leading to a 77% drop in plant growth. The findings matter for food safety because they show nanoplastics in contaminated soil can be taken up by food crops.
Nanoplastics (NPs) are increasingly prevalent in the environment, posing potential risks to agricultural systems and the food web. Despite this, currently it lacks comprehensive evaluation on NPs detection and quantification techniques, which is critical for quantitatively understanding the fate and transport of NPs. To address this gap, our study systematically assesses and compares advanced analytical tools for tracking different types of NPs (derived from both top-down and bottom-up approaches) from soil to plants. For identifying and quantifying NPs from environmental samples, pyrolysis - gas chromatography - mass spectrometry (Py-GC-MS) and confocal-Raman spectroscopy demonstrate promise. For laboratory study, inductively coupled plasma mass spectrometry (ICP-MS) along with metal doped NPs enables good sensitivity for tracking NPs in plant system. Our results demonstrated a substantial NPs internalization, 1.09 × 10 ¹ ¹ NPs per gram in shoots and 1.52 × 10 ¹ ¹ NPs per gram in roots, by wheat seedlings after five days of exposure, leading to a notable 77.26 % reduction in biomass. This study highlights the importance of integrating multiple techniques to overcome the limitations of each individual technique and provides quantitative insight into the detection of NPs within plant systems, contributing to the improvement of methodology for NPs related research in environmental and agricultural fields.
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This review examines how nanoplastics are detected, analyzed, taken up by plants, and migrate through plant tissues from roots to edible parts. As nanoplastics are found in agricultural soils, understanding how they enter food crops is critical for assessing human dietary exposure.
Visual tracking of label-free microplastics in wheat seedlings and their effects on crop growth and physiology
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Researchers used advanced microscopy to visually track label-free polystyrene microplastics as they moved through wheat seedlings from roots to shoots via the plant's water-transport system. At lower concentrations, the microplastics actually increased water uptake in roots, but at higher concentrations they significantly reduced chlorophyll and carotenoid levels. The study provides direct visual evidence that crop plants can absorb and transport microplastics, with potential consequences for plant health and food safety.
Vertical movement of microplastics by roots of wheat plant (Triticum aestivum) and the plant response in sandy soil
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This study investigated how wheat plant roots affect the movement of microplastics deeper into soil. The researchers found that root growth physically pushed microplastic fibers and fragments downward in the soil profile, potentially contaminating deeper soil layers and groundwater. The findings matter because they show that farming itself can spread microplastic pollution deeper into agricultural land, where it becomes harder to remove and more likely to affect water sources.
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