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<p>This study investigates the effect of 24-epibrassinolide (24-EBL) on the growth and biotic stress tolerance of <i>Brassica juncea</i> L. cv. Varuna against two fungal pathogens, <i>Alternaria brassicae</i> and <i>Sclerotinia sclerotiorum.</i> The 24-EBL at a concentration of 15&#xa0;µM, was most effective in enhancing the germination frequency and biomass of seedlings. The 24-EBL-treated plants exhibited a higher tolerance to fungal infection by modulation of redox homeostasis and enhancement in photosynthetic efficiency. Epifoliar application of 24-EBL increased the endogenous level of salicylic acid and decreased abscisic acid under pathogenic stress, the key regulators of the defence network in plants. This study highlights the protective potential of 24-EBL against sclerotia stem rot and <i>Alternaria</i> leaf spot in <i>B. juncea</i>, leading to higher yields in an environmentally sustainable manner.</p>

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24-Epibrassinolide Protects Against Sclerotia Stem Rot and Alternaria Leaf Spot in Brassica juncea L

  • 期刊论文

  • 发表日期：

    2026年3月9日

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  • Shashi Shekhar,
  • Rashmi Chaudhary,
  • Deepak Kumar,
  • Prashasti Pandey,
  • Ravi Rajwanshi,
  • Anjana Rustagi

摘要

This study investigates the effect of 24-epibrassinolide (24-EBL) on the growth and biotic stress tolerance of Brassica juncea L. cv. Varuna against two fungal pathogens, Alternaria brassicae and Sclerotinia sclerotiorum. The 24-EBL at a concentration of 15 µM, was most effective in enhancing the germination frequency and biomass of seedlings. The 24-EBL-treated plants exhibited a higher tolerance to fungal infection by modulation of redox homeostasis and enhancement in photosynthetic efficiency. Epifoliar application of 24-EBL increased the endogenous level of salicylic acid and decreased abscisic acid under pathogenic stress, the key regulators of the defence network in plants. This study highlights the protective potential of 24-EBL against sclerotia stem rot and Alternaria leaf spot in B. juncea, leading to higher yields in an environmentally sustainable manner.