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<p>This experiment aimed to investigate the efficacy of <i>Ascophyllum nodosum</i> seaweed extracts (SWE) and nano potash (nK) fertilizer in enhancing salinity tolerance in rice (<i>Oryza sativa</i> L.cv. BRRI dhan100). The focus was on mitigating the negative effects of salinity stress on rice growth and production. Rice plants were exposed to two levels of salinity (50 and 100 mM NaCl) and treated with foliar applications of 0.1 g L⁻¹ nK and 0.1% SWE, mixed with irrigated water at 7-day intervals, starting 30 days after transplantation. A randomized design was employed to conduct this experiment. Various physiological and biochemical parameters were measured to assess the impact of treatments on salinity-induced stress. Salinity stress significantly reduced relative water content, plant height, leaf area, biomass accumulation, and chlorophyll content, while increasing oxidative stress markers such as malondialdehyde, hydrogen peroxide, lipid peroxidation, electrolyte leakage, and methylglyoxal. The combined application of SWE and nK alleviated these adverse effects by enhancing the levels of non-enzymatic antioxidants (ascorbate and glutathione) and improving the activities of antioxidative and glyoxalase enzymes, including ascorbate peroxidase, dehydroascorbate reductase, glutathione reductase, monodehydroascorbate reductase, glutathione peroxidase, and catalase. The application of SWE and nK synergistically mitigated salinity-induced oxidative stress in rice. This was accomplished by modulating redox homeostasis and enhancing both antioxidative and glyoxalase defense systems, suggesting a potential strategy to improve salinity tolerance in rice cultivation.</p>

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Seaweed Extracts and Nano Potash Combinedly Regulate ROS Metabolism in Conferring Salt Tolerance in Rice

  • 期刊论文

  • 发表日期：

    2026年2月7日

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  • Md. Sarwar Hosen,
  • Md. Mahabub Alam,
  • P. V. Vara Prasad,
  • Mirza Hasanuzzaman

摘要

This experiment aimed to investigate the efficacy of Ascophyllum nodosum seaweed extracts (SWE) and nano potash (nK) fertilizer in enhancing salinity tolerance in rice (Oryza sativa L.cv. BRRI dhan100). The focus was on mitigating the negative effects of salinity stress on rice growth and production. Rice plants were exposed to two levels of salinity (50 and 100 mM NaCl) and treated with foliar applications of 0.1 g L⁻¹ nK and 0.1% SWE, mixed with irrigated water at 7-day intervals, starting 30 days after transplantation. A randomized design was employed to conduct this experiment. Various physiological and biochemical parameters were measured to assess the impact of treatments on salinity-induced stress. Salinity stress significantly reduced relative water content, plant height, leaf area, biomass accumulation, and chlorophyll content, while increasing oxidative stress markers such as malondialdehyde, hydrogen peroxide, lipid peroxidation, electrolyte leakage, and methylglyoxal. The combined application of SWE and nK alleviated these adverse effects by enhancing the levels of non-enzymatic antioxidants (ascorbate and glutathione) and improving the activities of antioxidative and glyoxalase enzymes, including ascorbate peroxidase, dehydroascorbate reductase, glutathione reductase, monodehydroascorbate reductase, glutathione peroxidase, and catalase. The application of SWE and nK synergistically mitigated salinity-induced oxidative stress in rice. This was accomplished by modulating redox homeostasis and enhancing both antioxidative and glyoxalase defense systems, suggesting a potential strategy to improve salinity tolerance in rice cultivation.