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<p>Wheat (<i>Triticum aestivum</i> L.) is one of the world’s most important cereal crops, yet its production is significantly threatened by <i>Fusarium</i> crown and root rot, predominantly caused by <i>Fusarium culmorum</i>. Conventional chemical control measures are often unsustainable and pose environmental risks, highlighting the need for alternative strategies such as elicitor-induced resistance. Among these, methyl jasmonate (MeJA), a derivative of jasmonic acid, functions as a central signaling molecule in plant defense against necrotrophic pathogens. MeJA triggers a wide array of defense mechanisms, including enhanced activities of antioxidant and defense-related enzymes (e.g., SOD, CAT, POX, PPO, LOX, and PAL), accumulation of phenolic compounds and callose, and upregulation of key defense-related genes (such as PAL, LOX, PR3, PR4, PR9, and CYP709C1) in both crown and root tissues. These responses mitigate oxidative damage, suppress pathogen progression, and induce systemic resistance. Moreover, MeJA modulates jasmonate signaling via JAZ transcriptional repressors and promotes cross-talk with salicylic acid pathways, enhancing the expression of PR proteins systemically. While most studies have been conducted under controlled conditions, the cumulative findings suggest that MeJA is a promising elicitor of induced resistance in wheat and a potential component of integrated management strategies for <i>Fusarium</i> diseases. This review provides a comprehensive analysis of global research studies on MeJA’s effects on <i>F. culmorum</i> infections in wheat, highlighting mechanisms, experimental outcomes, and practical implications.</p>

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Methyl Jasmonate–Based Defense Against Fusarium culmorum in Wheat: Current Evidence and Future Directions- A Review

  • 期刊论文

  • 发表日期：

    2026年4月17日

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  • Parastoo Motallebi

摘要

Wheat (Triticum aestivum L.) is one of the world’s most important cereal crops, yet its production is significantly threatened by Fusarium crown and root rot, predominantly caused by Fusarium culmorum. Conventional chemical control measures are often unsustainable and pose environmental risks, highlighting the need for alternative strategies such as elicitor-induced resistance. Among these, methyl jasmonate (MeJA), a derivative of jasmonic acid, functions as a central signaling molecule in plant defense against necrotrophic pathogens. MeJA triggers a wide array of defense mechanisms, including enhanced activities of antioxidant and defense-related enzymes (e.g., SOD, CAT, POX, PPO, LOX, and PAL), accumulation of phenolic compounds and callose, and upregulation of key defense-related genes (such as PAL, LOX, PR3, PR4, PR9, and CYP709C1) in both crown and root tissues. These responses mitigate oxidative damage, suppress pathogen progression, and induce systemic resistance. Moreover, MeJA modulates jasmonate signaling via JAZ transcriptional repressors and promotes cross-talk with salicylic acid pathways, enhancing the expression of PR proteins systemically. While most studies have been conducted under controlled conditions, the cumulative findings suggest that MeJA is a promising elicitor of induced resistance in wheat and a potential component of integrated management strategies for Fusarium diseases. This review provides a comprehensive analysis of global research studies on MeJA’s effects on F. culmorum infections in wheat, highlighting mechanisms, experimental outcomes, and practical implications.