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<p>A pot experiment was conducted to study the effect of nitric oxide treatment on barley plants under salinity stress<b>.</b> The results showed that, salt-stressed plants accumulated higher levels of proline, total soluble nitrogen, total soluble sugars, free amino acids, and&#xa0;sodium and exhibited an increase in membrane leakage compared with the control plants. Additionally, salt stress markedly increased endogenous abscisic acid levels, while significantly decreasing auxins, gibberellic acid, cytokinins, and the membrane stability index. These alterations negatively affected growth traits, and leaf photosynthetic pigments of stressed plants. However, both unstressed and salt-stressed barley plants treated with the SNP exhibited enhanced synthesis of proline, total soluble nitrogen, total soluble sugars, and free amino acids that resulted in reduced membrane leakage and sodium content, improved enhanced growth attributes, and different photosynthetic pigments, as well as endogenous hormones. In conclusion, our findings emphasize the potential mitigatory role of NO “donor sodium nitroprusside” in mitigating the reduced impact of salinity stress and draw attention to the necessity of more studies to fully comprehend the underlying mechanisms and investigate their usefulness in agricultural practices.</p>

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Sodium nitropurrside enhances salt tolerance in barley (Hordeum vulgare L.) by stimulating photoprotective defence mechanism

  • 期刊论文

  • 发表日期：

    2025年4月17日

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  • Elzahraa A. Elkordy,
  • Hala M. S. El-Bassiouny,
  • Hemmat H. Khattab,
  • Mervat S. Sadak

摘要

A pot experiment was conducted to study the effect of nitric oxide treatment on barley plants under salinity stress. The results showed that, salt-stressed plants accumulated higher levels of proline, total soluble nitrogen, total soluble sugars, free amino acids, and sodium and exhibited an increase in membrane leakage compared with the control plants. Additionally, salt stress markedly increased endogenous abscisic acid levels, while significantly decreasing auxins, gibberellic acid, cytokinins, and the membrane stability index. These alterations negatively affected growth traits, and leaf photosynthetic pigments of stressed plants. However, both unstressed and salt-stressed barley plants treated with the SNP exhibited enhanced synthesis of proline, total soluble nitrogen, total soluble sugars, and free amino acids that resulted in reduced membrane leakage and sodium content, improved enhanced growth attributes, and different photosynthetic pigments, as well as endogenous hormones. In conclusion, our findings emphasize the potential mitigatory role of NO “donor sodium nitroprusside” in mitigating the reduced impact of salinity stress and draw attention to the necessity of more studies to fully comprehend the underlying mechanisms and investigate their usefulness in agricultural practices.