数字农科院2.0

Foliar exposure to 6PPD-Q disturbs photosynthetic processes and induces oxidative stress in Eichhornia crassipes

文献类型： 外文期刊

作者： Yichen Ge;Ruiying Shi;Weitao Liu;Xiang Li;Xinwei Shi;Aurang Zeb;Yuexing Zhao;Jing An;Yuebing Sun

作者机构：

关键词： 6PPD-Q;Eichhornia crassipes;Foliar exposure;Phyllosphere;Phytotoxicity

期刊名称： Journal of Environmental Management

ISSN： 0301-4797

年卷期： 2025 年 395 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Air pollution is a currently common global concern issue. The widespread occurrence of N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine-quinone (6PPD-Q), a transformation product of tire additives detected on airborne particular matter, necessitates an urgent assessment of its environmental risks. This study investigated the phytotoxic effects of atmospheric 6PPD-Q deposition via foliar exposure on water hyacinth through integrated metabolomic, microbiomic, and spectroscopic analyses. 6PPD-Q exposure severely damaged chloroplast ultrastructure and suppressed Rubisco activity by 21.09 % at high concentrations, driving concentration-dependent reductions in net photosynthetic rate (28.95 %, 41.83 %, and 55.88 %). Concurrent oxidative stress and nutrient uptake limitations further impaired carbohydrate metabolism. Molecular docking and spectral analyses revealed structural perturbations in key functional proteins, while phyllosphere microbiome disruption manifested through simplified fungal-bacterial co-occurrence networks and depletion of beneficial taxa. These collective impacts exacerbated plant physiological dysfunction. Our findings demonstrate the systemic phytotoxic mechanisms of airborne 6PPD-Q, highlighting the urgent need to investigate its ecological risks in ecosystems.

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