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Appraisal of Functions and Role of Selenium in Heavy Metal Stress Adaptation in Plants

Author

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  • Mohd Asgher

    (Plant Physiology and Biochemistry Laboratory, Department of Botany, Baba Ghulam Shah Badshah University, Rajouri 185234, India)

  • Abdul Rehaman

    (Plant Physiology and Biochemistry Laboratory, Department of Botany, Baba Ghulam Shah Badshah University, Rajouri 185234, India)

  • Syed Nazar ul Islam

    (Plant Physiology and Biochemistry Laboratory, Department of Botany, Baba Ghulam Shah Badshah University, Rajouri 185234, India)

  • Mohd Arshad

    (Plant Physiology and Biochemistry Laboratory, Department of Botany, Baba Ghulam Shah Badshah University, Rajouri 185234, India)

  • Nafees A. Khan

    (Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University, Aligarh 202002, India)

Abstract

Heavy metals (HMs) contamination is one of the main abiotic factors affecting crop productivity and also threatens human health via consuming metal-contaminated crops as a food source. Over the past few years, HMs have drawn a lot of attention due to their increased use for commercial purposes and their harmful effects on plants and other life forms, thus threatening human survival. However, several methods have been adopted in recent years to combat the harsh effects of HMs. After phytohormones, the use of mineral nutrients such as selenium (Se) in the prevention of HM stress has been explored by researchers more recently. Selenium is an important micronutrient widely known for its antioxidant properties in plants and animals. Exogenous Se inhibits metal uptake and translocation and improves the antioxidant system, thus imparting resistance to HM toxicity in plants. Moreover, Se also regulates the production of various osmolytes in cells, which helps develop cell osmolarity. Selenium also produces different secondary metabolites in plants’ defense mechanisms against different stresses. The uptake of mineral nutrients is a vital process for plant growth and development, which is also positively correlated with Se under metalloid toxicity. However, to understand the exact mechanism of Se in HM tolerance, different metabolic processes stimulated by Se and their pathways need to be explored. Hence, this review focuses on the role of Se on nutritional status, antioxidant metabolism, interaction with phytohormones and its role in the regulation of various genes involved in Se-induced HM tolerance. Thus, this study will help researchers in the future for the improvement of HM tolerance via Se application in plants.

Suggested Citation

  • Mohd Asgher & Abdul Rehaman & Syed Nazar ul Islam & Mohd Arshad & Nafees A. Khan, 2023. "Appraisal of Functions and Role of Selenium in Heavy Metal Stress Adaptation in Plants," Agriculture, MDPI, vol. 13(5), pages 1-21, May.
    • Handle: RePEc:gam:jagris:v:13:y:2023:i:5:p:1083-:d:1150507
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    References listed on IDEAS

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    1. Haizhao Xu & Jinpeng Yan & Yan Qin & Jingmao Xu & M. J. I. Shohag & Yanyan Wei & Minghua Gu, 2020. "Effect of Different Forms of Selenium on the Physiological Response and the Cadmium Uptake by Rice under Cadmium Stress," IJERPH, MDPI, vol. 17(19), pages 1-13, September.
    2. Zhenglan Tai & Xinqiang Yin & Zhigang Fang & Gaoling Shi & Laiqing Lou & Qingsheng Cai, 2017. "Exogenous GR24 Alleviates Cadmium Toxicity by Reducing Cadmium Uptake in Switchgrass ( Panicum virgatum ) Seedlings," IJERPH, MDPI, vol. 14(8), pages 1-12, July.
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    1. Han Xu & Jie Liu & Na Huang & Anqing Yu & Jingyuan Li & Qiao Li & Qiunan Yang & Lulu Long, 2024. "Precision Remediation of Mining Soils through On-Site Investigation and Large-Scale Synthesized Ferrosilicate," Sustainability, MDPI, vol. 16(17), pages 1-14, August.

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