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Polystyrene microplastic-derived dissolved organic matter mitigates arsenic phytotoxicity in Tibetan hulless barley seedlings: Phenotypic and transcriptomic evidence
Plant Diversity
2026
Yicai Huang,
Yating Du,
Zhuang Zhang,
Xue Zhang,
Tantan Wang,
Kaihua Yang,
Xin Li,
Chang Zhang,
Chi Ma
Summary
Researchers found that dissolved organic matter released from UV-aged polystyrene microplastics actually reduced arsenic toxicity in Tibetan hulless barley seedlings, increasing biomass by roughly 18-20% compared to arsenic exposure alone. The protective effect worked through two mechanisms: arsenic-DOM complexation that blocked plant uptake and enhanced cellular detoxification pathways that sequestered arsenic in vacuoles.
Polymers