An unrecognized entry pathway of submicrometre plastics into crop root: The split of hole in protective layer
文献类型： 外文期刊
作者： Wang, Luya 1 ; Liu, Beibei 1 ; Zhang, Wen 1 ; Li, Qinfen 1 ; Lin, Bigui 1 ; Wei, Chaoxian 1 ;
作者机构： 1.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Haikou 571101, Peoples R China
2.Minist Agr & Rural Affairs, Key Lab Low Carbon Green Agr Trop Reg China, Haikou 571101, Peoples R China
3.Natl Long Term Expt Stn Agr Green Dev, Danzhou 571737, Peoples R China
4.Natl Agr Expt Stn Agr Environm, Danzhou 571737, Peoples R China
5.Hainan Key Lab Trop Ecocircular Agr, Haikou 571101, Peoples R China
关键词： Submicrometre plastics; Crop root; Protective layer; Entry pathway; Holes
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 457 卷
页码：
收录情况： SCI
摘要： Threats to food safety caused by the continuous accumulation of plastic particles in the terrestrial environment is currently a worldwide concern. To date, descriptions of how plastic particles pass the external biological barrier of crop root have been vague. Here, we demonstrated that submicrometre polystyrene particles passed unimpededly the external biological barrier of maize through the split of holes in the protective layer. We identified plastic particles induced the apical epidermal cells of root tips become round, thereby expanding the intercellular space. It further pulled apart the protective layer between the epidermal cells, and eventually formed the entry pathway for plastic particles. The enhancement of oxidative stress level induced by plastic particles was the main reason for the deformation of the apical epidermal cells (increased roundness values: 15.5%), comparing to the control. Our findings further indicated that the presence of cadmium was conducive to the "holes" formation. Our results highlighted the critical insights into the fracture mechanisms of plastic particles for the external biological barriers of crop roots, providing a strong incentive to access the risk of plastic particles in agriculture security.
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