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Chinese Agricultural Science Bulletin ›› 2025, Vol. 41 ›› Issue (33): 113-120.doi: 10.11924/j.issn.1000-6850.casb2025-0218

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Research Progress on Regulation Mechanism of Exogenous Selenium Response to High Temperature Stress in Plants

SU Yunyun1(), XU Mengxin2, OU Xiaobin1, GONG Lei1, ZHANG Kui1, GUO Qian1   

  1. 1 Gansu Key Laboratory of Protection and Utilization for Biological Resources and Ecological Restoration, School of Agriculture and Bioengineering, Longdong University, Qingyang, Gansu 745000
    2 Linyi Vocational University of Science and Technology, Linyi, Shandong 276017
  • Received:2025-03-21 Revised:2025-06-15 Online:2025-11-25 Published:2025-12-01

Abstract:

High temperature stress has become one of the critical environmental factors limiting plant growth and distribution. Selenium, as an essential trace element for the growth of animals and plants, possesses multiple functions such as antioxidant activity, regulating growth and development, and enhancing plant stress resistance. In recent years, selenium has become a hot topic in academic research as an exogenous substance involved in the response mechanism of abiotic stress. This article comprehensively reviews the impacts of high temperature stress on plant growth, physiology, and biochemistry, as well as the physiological and molecular mechanisms of plants response to high temperature. It thoroughly summarizes the uptake and transformation process of selenium in plants and deeply analyzes the mechanism of selenium enhancing plant heat tolerance. From a physiological perspective, exogenous selenium maintains high activity of glutathione peroxidase (GSH-Px), enhances plant antioxidant capacity, scavenges excessive reactive oxygen species, and maintains the integrity of the thylakoid membrane structure in chloroplasts, and effectively alleviates photosynthetic inhibition and membrane lipid peroxidation caused by high temperature stress through osmotic regulation and other pathways. At the molecular level, selenium can induce the expression of key heat-resistant genes, antioxidant genes, and related metabolic pathways genes in response to high temperature stress. Future research on selenium in plant stress resistance should adopt a multi-omics joint analysis method to deeply explore and analyze the application value of selenium, with the aim of providing a solid theoretical basis for improving plant stress resistance.

Key words: selenium, high temperature stress, plant, physiological characteristics, molecular mechanism, stress resistance