Cerium Oxide Nanoparticle Protects Maize from Cobalt Stress: Insights from Transcriptomics and Oxidative Stress Response Analysis
文献类型： 外文期刊
作者： Salam, Abdul 1 ; Qi, Jiaxuan 1 ; Fan, Xingming 3 ; Khan, Ali Raza 4 ; Kah, Melanie 5 ; Zeeshan, Muhammad 2 ; Ulhassan, Zaid 1 ; Yang, Shuaiqi 6 ; Rehman, Muhammad 1 ; Gan, Yinbo 1 ;
作者机构： 1.Zhejiang Univ, Coll Agr & Biotechnol, Dept Agron, Zhejiang Key Lab Crop Germplasm, Hangzhou 310058, Peoples R China
2.South China Agr Univ, Natl Key Lab Green Pesticide, Guangzhou 510642, Peoples R China
3.Yunnan Acad Agr Sci, Inst Food Crops, Kunming 650205, Peoples R China
4.Jiangsu Univ, Sch Environm & Safety Engn, Zhenjiang 212013, Peoples R China
5.Univ Auckland, Sch Environm, Auckland 1010, New Zealand
6.Fujian Agr & Forestry Univ, Haixia Inst Sci & Technol, Fuzhou 350002, Peoples R China
关键词： cobalt stress; maize; cerium oxide nanoparticles; oxidative stress; RNA seq; ultrastructure
期刊名称：ACS APPLIED MATERIALS & INTERFACES （ 影响因子：8.2； 五年影响因子：8.5 ）
ISSN： 1944-8244
年卷期： 2025 年 17 卷 25 期
页码：
收录情况： SCI
摘要： Nanozymes are a class of functional nanomaterials and potential next-generation artificial enzymes that exhibit catalytic properties. However, their role against cobalt (Co) stress and the underlying mechanisms remain largely unexplored. This study aimed to investigate the potential of cerium oxide nanoparticles (CeO2 NPs as nanozymes) against Co-induced stress in maize and to uncover the underlying physiological and molecular mechanisms. Maize seeds were primed with CeO2 NPs at 500 mg L-1 and exposed to 300 mu M Co stress under hydroponic conditions. Results showed that Co accumulated in the roots and is subsequently translocated to aboveground tissues, affecting several key growth parameters in maize plants. In contrast, CeO2 NPs alleviated these adverse effects by enhancing growth and nutrient contents while reducing Co uptake. Photosynthesis and antioxidant enzyme activities were increased, while reactive oxygen species and malondialdehyde were reduced. Additionally, RNA-Seq analysis revealed significant alterations in the expression of key genes related to ion binding, metal transporters, and metabolite biosynthesis, offering molecular evidence of their role under Co stress. Notably, KEGG and GO analyses highlighted significant differences in hormonal signaling, phenylpropanoid biosynthesis, and glutathione metabolism in primed maize under Co stress. Taken together, this study demonstrates that CeO2 NPs ameliorate Co toxicity in maize by preserving leaf ultrastructure, enhancing antioxidant defense and nutrient uptake, decreasing Co accumulation in roots and shoots, and providing a promising nanozyme-based approach for maize protection against Co-induced toxicity.
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