Nitric oxide ameliorates zinc oxide nanoparticles-induced phytotoxicity in rice seedlings

文献类型： 外文期刊

第一作者： Chen, Juan

作者： Chen, Juan;Liu, Xiang;Yin, Shan-Shan;Li, Xiu-Ling;Hu, Wen-Jun;Simon, Martin;Shen, Zhi-Jun;Zheng, Hai-Lei;Chen, Juan;Wang, Chao;Hu, Wen-Jun;Xiao, Qiang;Chu, Cheng-Cai;Chu, Cheng-Cai;Peng, Xin-Xiang

作者机构：

关键词： Antioxidant;Nitric oxide;Phytotoxicity;Rice;Zinc oxide nanoparticles

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：10.588； 五年影响因子：10.129 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Nitric oxide (NO) has been found to function in enhancing plant tolerance to various environmental stresses. However, role of NO in relieving zinc oxide nanoparticles (ZnO NPs)-induced phytotoxicity remains unknown. Here, sodium nitroprusside (SNP, a NO donor) was used to investigate the possible roles and the regulatory mechanisms of NO in counteracting ZnO NPs toxicity in rice seedlings. Our results showed that 10 mu M SNP significantly inhibited the appearance of ZnO NP toxicity symptoms. SNP addition significantly reduced Zn accumulation, reactive oxygen species production and lipid peroxidation caused by ZnO NPs. The protective role of SNP in reducing ZnO NPs-induced oxidative damage is closely related to NO-mediated antioxidant system. A decrease in superoxide dismutase activity, as well as an increase in reduced glutathione content and peroxidase, catalase and ascorbate peroxidase activity was observed under SNP and ZnO NPs combined treatments, compared to ZnO NPs treatment alone. The relative transcript abundance of corresponding antioxidant genes exhibited a similar change. The role of NO in enhancing ZnO NPs tolerance was further confirmed by genetic analysis using a NO excess mutant (noe1) and an OsNOA1-silenced plant (noa1) of rice. Together, this study provides the first evidence indicating that NO functions in ameliorating ZnO NPs-induced phytotoxicity. (C) 2015 Elsevier B.V. All rights reserved.

分类号： TB1

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