Molecular mechanisms of toxicity and detoxification in rice (Oryza sativa L.) exposed to polystyrene nanoplastics

第一作者：	Lu, Siyuan
英文第一作者：	Lu, Siyuan
联系作者：	Wang, Yong; Zou, Lifang
英文联系作者：	Wang, Yong; Zou, Lifang
发表年度：	2023
卷：	199
摘要：	Nanoplastics (NPs) are an emerging threat to higher plants in terrestrial ecosystems. However, the molecular of NP-related phytotoxicity remains unclear. In the present study, rice seedlings were exposed to polystyrene (PS, 50 nm) NPs at 0, 50, 100, and 200 mg/L under hydroponic conditions to investigate the induced physiological indices and transcriptional mechanisms. We found that 50, 100, and 200 mg/L PS significantly reduced root (53.05%, 49.61%, and 57.58%, respectively) and shoot (54.63%, 61.56%, and 62.64%, respectively) biomass as compared with the control seedlings. The activities of antioxidant enzymes, including catalase (CAT), peroxidase (POD), superoxide dismutase (SOD), and ascorbate peroxidase (APX), were significantly activated in all PS treatment groups, indicating that PS inhibited plant growth and induced oxidative stress. Transcriptome analyses showed that PS modulated the expression of the genes involved in cell detoxification, active oxygen metabolism, mitogen-activated protein kinase (MAPK), and plant hormone transduction pathways. Our study provides new insights into phytotoxicity by demonstrating the potential underlying toxicity of PS NPs in higher plants.
刊物名称：	PLANT PHYSIOLOGY AND BIOCHEMISTRY
参与作者：	Lu,SY(Lu,Siyuan)[1];Huo,ZQ(Huo,Zhongqi)[1];Niu,TT(Niu,Tingting)[1];(Zhu,Weize)[1];(Wang,Junyuan)[1];(Wu,Donghui)[1],[2];(He,Chunguang)[1];(Wang,Yong)[1];(Zou,Lifang)[1];(Sheng,Lianxi)[1]