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<p>Increased level of antioxidants and enzymatic activity protects the plants from oxidative damage under stress conditions. In the present study antioxidants involved in the Ascorbate–Glutathione (ASC–GSH) cycle (Ascorbate Peroxidase, Glutathione Reductase, Ascorbate and Dehydroascorbate) were investigated under salt stress in two species of genus <i>Prosopis</i> (<i>P. cineraria</i> and <i>P. juliflora</i>). Both these species are economically very important in arid and semi-arid regions of Rajasthan. For the experimentation one-week-old seedling were treated with different salt concentrations ranging from 0 to 200 mM (0, 25, 50, 75, 100, 150 and 200). The leaves were harvested after 15 and 30 days. The Ascorbate content of both the species increased under salt stress. But Dehydroascorbate content decrease. The activity of enzymes Ascorbate Peroxidase (APX) and Glutathione Reductase (GR) were also increased under salt stress. The increase was comparatively more prominent in <i>P. juliflora</i> which indicates the upregulation of Ascorbate-Glutathione cycle is higher in <i>P. juliflora</i> and it plays a great role in making <i>P. juliflora</i> more tolerant under high salinity conditions.</p>

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Effect of salinity on some enzymatic and non-enzymatic antioxidants of Asada-Halliwell pathway in P. cineraria and P. juliflora

  • 期刊论文

  • 发表日期：

    2025年11月13日

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  • Monika Sharma,
  • Rachana Dinesh,
  • Seema Sen

摘要

Increased level of antioxidants and enzymatic activity protects the plants from oxidative damage under stress conditions. In the present study antioxidants involved in the Ascorbate–Glutathione (ASC–GSH) cycle (Ascorbate Peroxidase, Glutathione Reductase, Ascorbate and Dehydroascorbate) were investigated under salt stress in two species of genus Prosopis (P. cineraria and P. juliflora). Both these species are economically very important in arid and semi-arid regions of Rajasthan. For the experimentation one-week-old seedling were treated with different salt concentrations ranging from 0 to 200 mM (0, 25, 50, 75, 100, 150 and 200). The leaves were harvested after 15 and 30 days. The Ascorbate content of both the species increased under salt stress. But Dehydroascorbate content decrease. The activity of enzymes Ascorbate Peroxidase (APX) and Glutathione Reductase (GR) were also increased under salt stress. The increase was comparatively more prominent in P. juliflora which indicates the upregulation of Ascorbate-Glutathione cycle is higher in P. juliflora and it plays a great role in making P. juliflora more tolerant under high salinity conditions.