Abstract
Atmospheric micro(nano)plastics (MNPs), including polyethylene terephthalate (PET), enter plants via leaves, accumulating in tissues. Foliar PET nanoplastic exposure alters Nicotiana benthamiana nicotine biosynthesis, favoring the more potent (S)-isomer even without growth inhibition. This accumulation reveals a contamination pathway for combustible consumer products, demonstrating that MNPs-induced alteration of a plant’s endogenous biochemistry represents a significant and previously uncharacterized risk to agricultural sustainability and human health.
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Tan, M. M., Sun, X. D., Wang, Y., Duan, J. L., Ma, J. Y., Liu, X. Y., … Yuan, X. Z. (2025). Airborne PET nanoplastics alter tobacco’s chemical risk. Proceedings of the National Academy of Sciences of the United States of America, 122(51). https://doi.org/10.1073/pnas.2519054122
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