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Abstract <p>Hydrogen sulfide (H<sub>2</sub>S) is a putative signalling molecule that can help plants cope with salt stress. To mitigate the detrimental effects of sodium chloride stress, we examined the effects of sodium hydrogen sulfide (NaHS) (H<sub>2</sub>S donor; 50 µM) on salt-stressed <i>Luffa aegyptiaca</i> Mill (sponge gourd). The plant growth, pigment accumulation, carbohydrate, protein, and inorganic nitrogen content were severely hampered by salt exposure in sponge gourd seedlings. Besides, nitrogen metabolism-related enzymes were also altered on NaCl exposure. The activities of enzymatic and non-enzymatic antioxidants were triggered in sponge gourd to reduce the impact of H<sub>2</sub>O<sub>2</sub> build-up and MDA accretion under NaCl stress. However, NaHS exposure restored the plant growth, pigment content, carbohydrate accumulation, antioxidant potential, and promoted nitrogen metabolism in salt-stressed seedlings. Further, exposure of scavenger hypotaurine and inhibitor DL-propargylglycine validated the endogenous H<sub>2</sub>S supplementation on NaHS treatment in salt-stressed sponge gourd. Thus, it was concluded that NaHS exposure supplied H<sub>2</sub>S endogenously in NaCl-treated sponge gourd to induce salt-stress tolerance. Further, the route of exposure might be responsible for NaHS-mediated regulation of endogenous H<sub>2</sub>S biosynthesis/accumulation.</p>

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In vitro NaHS Exposure Induced Salt Stress Tolerance in Sponge Gourd

  • 期刊论文

  • 发表日期：

    2025年6月17日

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  • A. Firdoos,
  • P. Guleria,
  • V. Kumar

摘要

Abstract

Hydrogen sulfide (H2S) is a putative signalling molecule that can help plants cope with salt stress. To mitigate the detrimental effects of sodium chloride stress, we examined the effects of sodium hydrogen sulfide (NaHS) (H2S donor; 50 µM) on salt-stressed Luffa aegyptiaca Mill (sponge gourd). The plant growth, pigment accumulation, carbohydrate, protein, and inorganic nitrogen content were severely hampered by salt exposure in sponge gourd seedlings. Besides, nitrogen metabolism-related enzymes were also altered on NaCl exposure. The activities of enzymatic and non-enzymatic antioxidants were triggered in sponge gourd to reduce the impact of H2O2 build-up and MDA accretion under NaCl stress. However, NaHS exposure restored the plant growth, pigment content, carbohydrate accumulation, antioxidant potential, and promoted nitrogen metabolism in salt-stressed seedlings. Further, exposure of scavenger hypotaurine and inhibitor DL-propargylglycine validated the endogenous H2S supplementation on NaHS treatment in salt-stressed sponge gourd. Thus, it was concluded that NaHS exposure supplied H2S endogenously in NaCl-treated sponge gourd to induce salt-stress tolerance. Further, the route of exposure might be responsible for NaHS-mediated regulation of endogenous H2S biosynthesis/accumulation.