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Journal Article Epublish 31 citations

PubMed: 36311131 DOI: 10.3389/fpls.2022.986991

Effect of nano-silicon on the regulation of ascorbate-glutathione contents, antioxidant defense system and growth of copper stressed wheat ( L.) seedlings.

Front Plant Sci 13:986991

Authors: Muhammad Riaz, Shaopeng Zhao, Muhammad Kamran, Naveed Ur Rehman, Freddy Mora-Poblete, Carlos Maldonado, Muhammad Hamzah Saleem, Aasma Parveen, Abdullah Ahmed Al-Ghamdi, Fahad M Al-Hemaid, Shafaqat Ali, Mohamed S Elshikh

Affiliations

  • College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, China. College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China.
  • College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, China.
  • School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, SA, Australia.
  • Provincial Key Laboratory of Plant Molecular Breeding, South China Agricultural University, Guangzhou, China.
  • Institute of Biological Sciences, University of Talca, Talca, Chile.
  • Centro de Genómica y Bioinformática, Facultad de Ciencias, Universidad Mayor, Santiago, Chile.
  • College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China.
  • Department of Soil Science, Faculty of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur, Bahawalpur, Pakistan.
  • Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia.
  • Department of Environmental Sciences and Engineering, Government College University, Faisalabad, Pakistan.
  • Department of Biological Sciences and Technology, China Medical University, Taichung, Taiwan.

Abstract

Copper (Cu) toxicity can inhibit plant growth and development. It has been shown that silicon (Si) can relieve Cu stress. However, it is unclear how Si-nanoparticles (SiNPs) relieve Cu stress in wheat seedlings. Therefore, the current study was conducted by setting up four treatments: CK, SiNP: (2.5 mM), Cu: (500 µM), and SiNP+Cu: (2.5 mM SiNP+500 µM Cu) to explore whether SiNPs can alleviate Cu toxicity in wheat seedlings. The results showed that Cu stress hampered root and shoot growth and accumulated high Cu concentrations in roots (45.35 mg/kg) and shoots (25.70 mg/kg) of wheat as compared to control treatment. Moreover, Cu treatment inhibited photosynthetic traits and chlorophyll contents as well as disturbed the antioxidant defense system by accumulating malondialdehyde (MDA) and hydrogen peroxidase (HO) contents. However, SiNPs treatment increased root length and shoot height by 15.1% and 22%, respectively, under Cu toxicity. Moreover, SiNPs application decreased MDA and HO contents by 31.25% and 19.25%, respectively. SiNPs increased non-enzymatic compounds such as ascorbic acid-glutathione (AsA-GSH) and enhanced superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and ascorbic peroxidase (APX) activities by 77.5%, 141.7%, 68%, and 80%, respectively. Furthermore, SiNPs decreased Cu concentrations in shoots by 26.2%, as compared to Cu treatment alone. The results concluded that SiNPs could alleviate Cu stress in wheat seedlings. The present investigation may help to increase wheat production in Cu contaminated soils.

MeSH

Growth, Antioxidants, Oxidative Stress, Stress, Physiological, Therapeutics, Glutathione, Peroxidase

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