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<p>Alkaline stress is one of the most important environmental factors limiting the production of crops. The current research was conducted in a completely randomized design to investigate the alleviative role of 24-epibrassinolide (24-EBR) seed priming on biochemical and physiological parameters of <i>Lallemantia iberica</i> Spp plant under 48&#xa0;h of simulation with 15 mM Na<sub>2</sub>CO<sub>3</sub> (pH = 10.84). The 24-EBR significantly moderated the harmful effects of high pH imposition through diminishing the generation of MDA (43% and 55%), H<sub>2</sub>O<sub>2</sub> (51% and 68%), proline (41% and 22%), and soluble sugar (31% and 39%) contents in leaves and roots, respectively. The hormonal presoaking also led to the higher activity of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and phenylalanine ammonia-lyase (PAL) under exposure to alkaline stress. The findings provide evidence of 24-EBR as a versatile and valuable tool to improve plant resilience against alkaline stress due to the neutralization of oxygen-free radicals and improvement of antioxidant status. The study also shares information regarding biochemical insights to improve soil alkaline stress tolerance in dragonhead plants by alleviating ROS accumulation damage.</p>

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Epibrassinolide seed priming alleviates alkaline stress by enhancing antioxidant defense in dragonhead plants

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月4日

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  • Mahsa Allahverdian,
  • Fatemeh Rahmani

摘要

Alkaline stress is one of the most important environmental factors limiting the production of crops. The current research was conducted in a completely randomized design to investigate the alleviative role of 24-epibrassinolide (24-EBR) seed priming on biochemical and physiological parameters of Lallemantia iberica Spp plant under 48 h of simulation with 15 mM Na2CO3 (pH = 10.84). The 24-EBR significantly moderated the harmful effects of high pH imposition through diminishing the generation of MDA (43% and 55%), H2O2 (51% and 68%), proline (41% and 22%), and soluble sugar (31% and 39%) contents in leaves and roots, respectively. The hormonal presoaking also led to the higher activity of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and phenylalanine ammonia-lyase (PAL) under exposure to alkaline stress. The findings provide evidence of 24-EBR as a versatile and valuable tool to improve plant resilience against alkaline stress due to the neutralization of oxygen-free radicals and improvement of antioxidant status. The study also shares information regarding biochemical insights to improve soil alkaline stress tolerance in dragonhead plants by alleviating ROS accumulation damage.