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<p>Chromium (Cr) is highly toxic to plants, limiting their growth and yield; it further influences the intake and transport of minerals, promotes oxidative stress, and disturbs plant metabolism. Salicylic acid (SA) is a key stress-signalling phytohormone that has been shown to diminish the toxicity of Cr in various species of plants. The present investigation examined the effectiveness of 0.5- and 1-mM SA treatment to ameliorate the impacts of 0.15, 0.3, 1, 2-, and 3-mM Cr stress in Pea (HFP8909) during hydroponic culture. The findings revealed that the presence of SA reduced Cr’s harmful effects by enhancing the performance of the antioxidative defense system (Enzymatic: PsSOD, PsCAT, PsAPX, PsGPX, and PsPOX; non-enzymatic: glutathione pool, protein, and phenol content), and by decreasing superoxide radicals and relative membrane permeability. SA treatment in Cr-stressed pea plants boosted the expression of metal chelation-related genes (PsMETII and PsGST), promoting Cr tolerance and decreasing Cr absorption. The expression of photosynthesis-related genes (PsrbcL, PsrbcS, and Pschla/b) was downregulated during Cr stress, but substantially restored by exogenous SA administration. Therefore, the SA treatment may ameliorate Cr toxic effects by restoring the negative impacts of plant development resulting from Cr stress and improving Cr tolerance by altering the expression of metal chelation, photosynthesis, and antioxidant defence-related genes.</p>

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Salicylic acid enhanced the chromium tolerance in pea (Pisum sativum) by mitigating the oxidative damage and gene expression

  • 期刊论文

  • 发表日期：

    2026年7月27日

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  • Priyanka Yadav,
  • Shruti Jha,
  • Lucky Duhan,
  • Dipti Gahlawat,
  • Asha Sharma,
  • Sandeep Singh

摘要

Chromium (Cr) is highly toxic to plants, limiting their growth and yield; it further influences the intake and transport of minerals, promotes oxidative stress, and disturbs plant metabolism. Salicylic acid (SA) is a key stress-signalling phytohormone that has been shown to diminish the toxicity of Cr in various species of plants. The present investigation examined the effectiveness of 0.5- and 1-mM SA treatment to ameliorate the impacts of 0.15, 0.3, 1, 2-, and 3-mM Cr stress in Pea (HFP8909) during hydroponic culture. The findings revealed that the presence of SA reduced Cr’s harmful effects by enhancing the performance of the antioxidative defense system (Enzymatic: PsSOD, PsCAT, PsAPX, PsGPX, and PsPOX; non-enzymatic: glutathione pool, protein, and phenol content), and by decreasing superoxide radicals and relative membrane permeability. SA treatment in Cr-stressed pea plants boosted the expression of metal chelation-related genes (PsMETII and PsGST), promoting Cr tolerance and decreasing Cr absorption. The expression of photosynthesis-related genes (PsrbcL, PsrbcS, and Pschla/b) was downregulated during Cr stress, but substantially restored by exogenous SA administration. Therefore, the SA treatment may ameliorate Cr toxic effects by restoring the negative impacts of plant development resulting from Cr stress and improving Cr tolerance by altering the expression of metal chelation, photosynthesis, and antioxidant defence-related genes.