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<p>Various environmental stresses affect mungbean cultivation which leads to huge loss of productivity of the crop. Among these arsenic (As) contamination is the main abiotic stress which interferes with various biochemical, physiological and molecular parameters in plants, decreasing plant productivity. To alleviate As toxicity, zinc oxide nanoparticles (ZnONPs) have received a great attention. This study was conducted to analyze the effect of different concentrations of ZnONPs (10, 20 and 50&#xa0;mg/L) on photosynthetic pigments, photosynthetic efficiency, antioxidant system (enzymatic and non-enzymatic) and <i>psb</i> A gene expression in both tolerant (IPM 02–14) and susceptible (RMG 975) cultivars of mungbean under various concentration of As (0, 15 and 30&#xa0;µM). Based on the above parameters, it was concluded that the ZnONPs alleviate As toxicity more in cultivar IPM 02–14 than RMG 975 under 30&#xa0;µM As. The increased activity of antioxidative enzymes protects the cultivars from damaging effects of free radicals. Further, we observed that among various concentrations of ZnONPs, 20&#xa0;mg/L was most optimum in alleviating the As toxicity and enhanced mungbean performance. However, increasing the concentration to 50&#xa0;mg/L ZnONPs resulted in negative effects under As stress in both cultivars of mungbean. In conclusion, ZnONPs treatment could be considered an effective approach to increase mungbean production under stress and may possibly be useful as a potential plant growth promoting and stress protecting agent with new outlooks for applying in agricultural sector.</p>

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Zinc Oxide Nanoparticles Improve Photosynthesis by Modulating Antioxidant System and psb A Gene Expression Under Arsenic Stress in Different Cultivars of Vigna radiata

  • 期刊论文

  • 发表日期：

    2025年2月19日

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  • Sushma Rani,
  • Nilima Kumari,
  • Vinay Sharma

摘要

Various environmental stresses affect mungbean cultivation which leads to huge loss of productivity of the crop. Among these arsenic (As) contamination is the main abiotic stress which interferes with various biochemical, physiological and molecular parameters in plants, decreasing plant productivity. To alleviate As toxicity, zinc oxide nanoparticles (ZnONPs) have received a great attention. This study was conducted to analyze the effect of different concentrations of ZnONPs (10, 20 and 50 mg/L) on photosynthetic pigments, photosynthetic efficiency, antioxidant system (enzymatic and non-enzymatic) and psb A gene expression in both tolerant (IPM 02–14) and susceptible (RMG 975) cultivars of mungbean under various concentration of As (0, 15 and 30 µM). Based on the above parameters, it was concluded that the ZnONPs alleviate As toxicity more in cultivar IPM 02–14 than RMG 975 under 30 µM As. The increased activity of antioxidative enzymes protects the cultivars from damaging effects of free radicals. Further, we observed that among various concentrations of ZnONPs, 20 mg/L was most optimum in alleviating the As toxicity and enhanced mungbean performance. However, increasing the concentration to 50 mg/L ZnONPs resulted in negative effects under As stress in both cultivars of mungbean. In conclusion, ZnONPs treatment could be considered an effective approach to increase mungbean production under stress and may possibly be useful as a potential plant growth promoting and stress protecting agent with new outlooks for applying in agricultural sector.