Potential translocation process and effects of polystyrene microplastics on strawberry seedlings

文献类型： 外文期刊

第一作者： Zhang, Chen

作者： Zhang, Chen;Yue, Ning;Li, Xiaohui;Shao, Hua;Wang, Jing;Jin, Fen;An, Lihui

作者机构：

关键词： Microplastics; Strawberry seedlings; Hydroponic experiment; Uptake; Physiobiochemical effects

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：13.6； 五年影响因子：12.7 ）

ISSN： 0304-3894

年卷期： 2023 年 449 卷

页码：

收录情况： SCI

摘要： A growing body of concerns focuses on microplastics as an emerging threat to terrestrial soil-plant ecosystems, but few previous studies have concentrated on asexual plants. To fill this knowledge gap, we carried out a biodistribution study of polystyrene microplastics (PS-MPs) of different particle sizes in strawberry (Fragaria x ananassa Duch. cv. "Akihime") seedlings via the hydroponic cultivation method. Confocal laser scanning mi-croscopy (CLSM) results indicated that both 100 and 200 nm PS-MPs entered the roots and were further translocated to the vascular bundle through the apoplastic pathway. Both PS-MP sizes were detected in the vascular bundles of the petioles after 7 d of exposure, indicating a xylem-based upward translocation pathway. After 14 d, continuous upward translocation of 100 nm PS-MPs was observed above the petiole, while 200 nm PS-MPs could not be directly observed in the strawberry seedlings. This means that the uptake and translocation of PS-MPs depended on the size of PS-MPs and appropriate timing. The significant influence of strawberry seedling's antioxidant, osmoregulation, and photosynthetic systems(p < 0.05)was presented at 200 nm PS -MPs than 100 nm PS-MPs. Our findings provide scientific evidence and valuable data for the risk assessment of PS-MP exposure in asexual plant systems such as strawberry seedlings.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序