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<p>The salinity of the soil severely limits crop productivity in many regions of the world. The aim of this study was to investigate the effects of salt stress on growth parameters of mustard plants and the mitigating effects of potassium. In mustard plants susceptible to NaCl (50 mM), the effects of potassium (5, 10, 20, and 50&#xa0;mM) on photosynthesis and antioxidant defense systems were found during the current study. An experiment using a Complete Randomized Design (CRD) has ten treatments. Reduced fresh and dry mass, shoot and root length, SPAD value, photosynthesis, and other pertinent traits were seen in plants under NaCl stress. Moreover, increased quantities of the cellular-damaging substances malondialdehyde (MDA) and hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) were seen in plants living in salt environments. Similar to this, stressed plants showed elevated levels of antioxidant enzymes like catalase (CAT), peroxidase (POX), and superoxide dismutase (SOD), as well as higher proline content accumulation. That being said, KNO<sub>3</sub> lessened the phytotoxicity caused by NaCl by increasing the activity of antioxidant enzymes. Growth metrics rose, suggesting that the synthesis of H<sub>2</sub>O<sub>2</sub> and MDA was reduced by the enhanced activity of antioxidant enzymes. Consequently, KNO<sub>3</sub> can decrease abiotic stressors by efficiently controlling stress markers and antioxidant enzymes.</p>

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Dose-dependent response of potassium on antioxidant enzymes, photosynthetic efficiency, and carbohydrate metabolism in Indian mustard (Brassica jucea L.) under NaCl stress

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年3月3日

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  • Areeba Wahid,
  • Mohammad Faizan,
  • Yamshi Arif,
  • Pravej Alam,
  • Shamsul Hayat

摘要

The salinity of the soil severely limits crop productivity in many regions of the world. The aim of this study was to investigate the effects of salt stress on growth parameters of mustard plants and the mitigating effects of potassium. In mustard plants susceptible to NaCl (50 mM), the effects of potassium (5, 10, 20, and 50 mM) on photosynthesis and antioxidant defense systems were found during the current study. An experiment using a Complete Randomized Design (CRD) has ten treatments. Reduced fresh and dry mass, shoot and root length, SPAD value, photosynthesis, and other pertinent traits were seen in plants under NaCl stress. Moreover, increased quantities of the cellular-damaging substances malondialdehyde (MDA) and hydrogen peroxide (H2O2) were seen in plants living in salt environments. Similar to this, stressed plants showed elevated levels of antioxidant enzymes like catalase (CAT), peroxidase (POX), and superoxide dismutase (SOD), as well as higher proline content accumulation. That being said, KNO3 lessened the phytotoxicity caused by NaCl by increasing the activity of antioxidant enzymes. Growth metrics rose, suggesting that the synthesis of H2O2 and MDA was reduced by the enhanced activity of antioxidant enzymes. Consequently, KNO3 can decrease abiotic stressors by efficiently controlling stress markers and antioxidant enzymes.