Scholarlink

<p>Drought is regarded as a major environmental stress factor that hinders plant development and yield worldwide. In this study, salicylic acid (SA) improved the growth and nitrogen (N) uptake of Mungbean (<i>Vigna radiata</i>) seedlings in a concentration-dependent manner under varying regimes of drought stress. We investigated how the plant hormone salicylic acid (SA) affects nitrogen (N) synthesis in mungbean seedlings under SA, drought and combine SA + drought stress. Two SA concentrations of (0.5 and 1.0m M) were applied through seed priming method on two varieties of mungbean (Var 155 and Var 145) to drought stressed plants under (25% and 50%) field capacity (FC) condition. The experiment was conducted in a complete randomized pattern with treatment of SA, drought and combined SA + drought stress culminated into nine treatments. It was observed that Var 155 and Var 145 responded better at 1.0 mM SA concentration in ameliorating the effect of drought stress at 25% and 50%FC in comparison to 0.5mMSA. SA significantly decreased nitrate by 34.2%, ammonia by 37% and proline concentrations by 41% in Var 155 as compared to Var 145 when treated with 1.0 mM SA treatment under 50%FC. SA increased the activities of nitrogen metabolizing enzymes such as glutamine synthetase (GS), glutamate synthase (GOGAT) and nitrate reductase (NR) by 53%, 91% and 71% respectively in Var 155 after treatment with 1.0 mM SA as compared to Var 145 under 25%FC. The study revealed that SA increased the capacity of <i>V. radiata</i> to stabilize biological nitrogen fixation and high nitrogen metabolism. The transcript expression pattern of <i>nifH</i> was upregulated by 34.6% and 37% during drought treatment in Var 145 as compared to Var 155 by mitigating the excessive loss of water in plants caused by quick transpiration. These results reveal that SA plays a vital role on N utilization in SA treated <i>V. radiata</i> seedlings to adapt with drought stress. Therefore, this study presents a novel approach on how SA influences mungbean tolerance to drought stress through N assimilation.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Impact of Salicylic Acid (SA) on Nitrogen Metabolism in Mungbean (Vigna radiata) Seedlings Under Drought Stress

  • 期刊论文

  • 发表日期：

    2025年11月29日

查看全文
  • Emmanuel Iwuala,
  • Esther Ogunsiji,
  • Victor Odjegba,
  • Isiaka Abiodun,
  • Sylvia Uzochukwu,
  • Afroz Alam

摘要

Drought is regarded as a major environmental stress factor that hinders plant development and yield worldwide. In this study, salicylic acid (SA) improved the growth and nitrogen (N) uptake of Mungbean (Vigna radiata) seedlings in a concentration-dependent manner under varying regimes of drought stress. We investigated how the plant hormone salicylic acid (SA) affects nitrogen (N) synthesis in mungbean seedlings under SA, drought and combine SA + drought stress. Two SA concentrations of (0.5 and 1.0m M) were applied through seed priming method on two varieties of mungbean (Var 155 and Var 145) to drought stressed plants under (25% and 50%) field capacity (FC) condition. The experiment was conducted in a complete randomized pattern with treatment of SA, drought and combined SA + drought stress culminated into nine treatments. It was observed that Var 155 and Var 145 responded better at 1.0 mM SA concentration in ameliorating the effect of drought stress at 25% and 50%FC in comparison to 0.5mMSA. SA significantly decreased nitrate by 34.2%, ammonia by 37% and proline concentrations by 41% in Var 155 as compared to Var 145 when treated with 1.0 mM SA treatment under 50%FC. SA increased the activities of nitrogen metabolizing enzymes such as glutamine synthetase (GS), glutamate synthase (GOGAT) and nitrate reductase (NR) by 53%, 91% and 71% respectively in Var 155 after treatment with 1.0 mM SA as compared to Var 145 under 25%FC. The study revealed that SA increased the capacity of V. radiata to stabilize biological nitrogen fixation and high nitrogen metabolism. The transcript expression pattern of nifH was upregulated by 34.6% and 37% during drought treatment in Var 145 as compared to Var 155 by mitigating the excessive loss of water in plants caused by quick transpiration. These results reveal that SA plays a vital role on N utilization in SA treated V. radiata seedlings to adapt with drought stress. Therefore, this study presents a novel approach on how SA influences mungbean tolerance to drought stress through N assimilation.