Scholarlink

<p>Aluminium (Al) pollution is increasing in soil which impacts seriously the growth and yield of growing crop plants. Present study evaluated the role of exogenous kinetin (Kn; 1 and 5 µM) in mitigating aluminium (Al; 1 and 5 mM AlCl₃) stress in <i>Vigna radiata</i>. Aluminium stress significantly reduced plant height, dry weight, chlorophylls, carotenoids, δ-aminolevulinic acid, and glutamate semialdehyde, with stronger effects at higher Al concentrations. Foliar application of kinetin enhanced these parameters in both control and Al-stressed plants, with 5 µM Kn showing greater efficacy than 1 µM. Aluminium stress lowered Rubisco activity and the activities of nitrogen-metabolizing enzymes (nitrate reductase, glutamine synthetase, glutamate synthase), while kinetin application alleviated this decline. Kinetin also stimulated proline synthesis by increasing pyrroline-5-carboxylate synthetase (P5CS) and γ-glutamyl kinase activities, and reduced proline oxidase activity. Moreover, kinetin decreased oxidative stress markers—hydrogen peroxide, lipid peroxidation and NADPH oxidase activity—while enhancing the antioxidant defense system through increased activities of antioxidant enzymes, and elevated levels of reduced glutathione and cysteine. The decline in nitrogen content under Al stress was also mitigated by kinetin. Overall, foliar application of kinetin effectively counteracted Al-induced growth inhibition and metabolic impairments, demonstrating its potential to enhance stress tolerance and maintain physiological functions in <i>Vigna radiata</i> under aluminium toxicity.</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

Kinetin enhances growth and nitrogen metabolism under aluminium stress in Vigna radiata (L.) R. Wilczek

  • 期刊论文

  • 发表日期：

    2026年6月1日

查看全文
  • Khalid H. Alamer

摘要

Aluminium (Al) pollution is increasing in soil which impacts seriously the growth and yield of growing crop plants. Present study evaluated the role of exogenous kinetin (Kn; 1 and 5 µM) in mitigating aluminium (Al; 1 and 5 mM AlCl₃) stress in Vigna radiata. Aluminium stress significantly reduced plant height, dry weight, chlorophylls, carotenoids, δ-aminolevulinic acid, and glutamate semialdehyde, with stronger effects at higher Al concentrations. Foliar application of kinetin enhanced these parameters in both control and Al-stressed plants, with 5 µM Kn showing greater efficacy than 1 µM. Aluminium stress lowered Rubisco activity and the activities of nitrogen-metabolizing enzymes (nitrate reductase, glutamine synthetase, glutamate synthase), while kinetin application alleviated this decline. Kinetin also stimulated proline synthesis by increasing pyrroline-5-carboxylate synthetase (P5CS) and γ-glutamyl kinase activities, and reduced proline oxidase activity. Moreover, kinetin decreased oxidative stress markers—hydrogen peroxide, lipid peroxidation and NADPH oxidase activity—while enhancing the antioxidant defense system through increased activities of antioxidant enzymes, and elevated levels of reduced glutathione and cysteine. The decline in nitrogen content under Al stress was also mitigated by kinetin. Overall, foliar application of kinetin effectively counteracted Al-induced growth inhibition and metabolic impairments, demonstrating its potential to enhance stress tolerance and maintain physiological functions in Vigna radiata under aluminium toxicity.