文献类型： 外文期刊
作者： Rather, Bilal A. 1 ; Masood, Asim 1 ; Qiao, Fei 3 ; Jiang, Xuefei 2 ; Zafar, Muhammad Mubashar 2 ; Cong, Hanqing 3 ; Khan, Nafees A. 1 ;
作者机构： 1.Aligarh Muslim Univ, Dept Bot, Plant Physiol & Biochem Lab, Aligarh 202002, India
2.Hainan Univ, Sanya Inst Breeding & Multiplicat, Sch Trop Agr & Forestry, Sanya 572024, Peoples R China
3.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Haikou 571101, Peoples R China
关键词： Copper stress; Mustard; Nitric oxide; Nitrogen; Photosynthesis and antioxidant system
期刊名称：PLANT SCIENCE （ 影响因子：4.1； 五年影响因子：5.1 ）
ISSN： 0168-9452
年卷期： 2025 年 353 卷
页码：
收录情况： SCI
摘要： Copper (Cu) holds a significant importance in plant metabolism as it serves as an essential micronutrient but becomes toxic at higher concentrations. Nitric oxide (NO), a key signaling molecule, and nitrogen (N) play essential roles in combating toxicity of some metals. This study explores the potential of interactive effects of NO as 100 mu M SNP (sodium nitroprusside, NO source) and N (80 mg N kg-1 soil) in mitigating Cu (100 mg Cu kg-1 soil) stress in mustard (Brassica juncea L.) plants. The impaired physio-biochemical changes, photosynthetic efficiency, and the expression level of genes associated with photosynthesis, and N assimilation under Cu stress were ameliorated with the exogenous application of NO and N. The combined treatment of NO and N conspicuously lowered reactive oxygen species (ROS) and its related impacts. It also enhanced the activity and relative expression of antioxidant enzymes, including ascorbate peroxidase (APX), glutathione reductase (GR), and superoxide dismutase (SOD) as well as N assimilation enzymes, such as nitrate reductase (NR) and nitrite reductase (NiR). The supplementation of NO and N also triggered the expression of rbcL (large subunit of Rubisco), photosystem (photosystem II D1 protein; psbA and photosystem II protein B; psbB) and markedly improved photosynthetic capacity under Cu stress. The study highlights the significance of NO and N as a potential strategy to counteract Cu-induced stress in crops. It suggests a synergistic or interactive effect between the two substances as a phytoremediation strategy for enhancing crop growth and productivity in Cu-contaminated soils. Understanding the mechanisms behind NO and N mediated stress alleviation could facilitate the development of targeted approaches to enhance plant resilience against heavy metal stress.
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