Effect of graphene oxide-glyphosate nanocomposite on wheat and rape seedlings: Growth, photosynthesis performance, and oxidative stress response

文献类型： 外文期刊

第一作者： Wang, Jian

作者： Wang, Jian;Xie, Haicui;Han, Jinling;Lin, Xiaohu;Wang, Xiuping;Lin, Xiaohu;Wang, Xiuping;Li, Jun

作者机构：

关键词： Glyphosate-Graphene oxide; Photosynthesis; Oxidative stress; Antioxidant system; Gene expression; Rape seedling; Wheat seedling

期刊名称：ENVIRONMENTAL TECHNOLOGY & INNOVATION （ 影响因子：7.758； 五年影响因子：7.375 ）

ISSN： 2352-1864

年卷期： 2022 年 27 卷

页码：

收录情况： SCI

摘要： Recently, nanomaterials have been increasingly applied to improve the bioactivity of pesticides for plant protection. However, the incorporation of nanomaterials into nano herbicides is still in the early stage of development. In this study, the effect of GO-GLY nanocomposites was tested on wheat and edible rape seedlings in terms of growth parameters, photosynthises, the activity and gene expression of antioxidant enzymes. The results showed that compared with GO or GLY alone, GO-GLY nanocomposite more significantly inhibited the growth of wheat and rape seedlings, decreased the net photosynthetic rate, stomatal conductance, transpiration rate, primary maximum photochemical efficiency of photosystem II, actual quantum yield and photosynthetic electron transport rate, while significantly increased the intercellular CO2 concentration. These changes may be related to increases in oxidative stress, as indicated by the higher accumulation of O-2(center dot-) and H2O2 under GO-GLY treatment. Furthermore, GO- GLY treatment increased the activities of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR) and glutathione reductase (GR) in both plant species compared with GO or GLY alone. In addition, gene expression analysis revealed that GO-GLY treatment upregulated the transcription of CATs, APXs, MDHAR, and DHAR genes in wheat seedlings, and elevated that of CATs, APXs, MDHAR, DHAR, and GR genes in rape seedlings compared with GO or GLY alone. Ultimately, in response to GO-GLY stress, a preliminary regulatory mechanism was proposed for the self-protective mechanism of wheat and rape seedlings, which lays a theoretical foundation for the wide application of nano-herbicides. (C) 2022 The Author(s). Published by Elsevier B.V.

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