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<p>Arbuscular mycorrhizal fungi (AMF) are an essential symbiotic partner colonizing more than 70% of land plants. In exchange for carbon sources, mycorrhizal association ameliorates plants’ growth and yield and enhances stress tolerance and/or resistance. To achieve this symbiosis, plants mediate a&#xa0;series of biomolecular changes, including the&#xa0;regulation of phytohormones. This review focuses on the&#xa0;role of each phytohormone in establishing symbiosis. It encases phytohormone modulation, exogenous application of the hormones, and mutant studies. The review also comments on the plausible phytohormone cross-talk essential for maintaining balanced mycorrhization and preventing fungal parasitism. Finally, we briefly discuss AMF-mediated stress regulation and contribution of phytohormone modulation in plants. We must examine their interplay to understand how phytohormones act species-specific or concentration-dependent manner. The review summarizes the gaps in these studies to improve our understanding of processes underlying plant-AMF symbiosis.</p>

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Intricate phytohormonal orchestration mediates mycorrhizal symbiosis and stress tolerance

  • 期刊论文

  • 发表日期：

    2025年2月25日

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  • Kaushiki N. Kandalgaonkar,
  • Vitthal T. Barvkar

摘要

Arbuscular mycorrhizal fungi (AMF) are an essential symbiotic partner colonizing more than 70% of land plants. In exchange for carbon sources, mycorrhizal association ameliorates plants’ growth and yield and enhances stress tolerance and/or resistance. To achieve this symbiosis, plants mediate a series of biomolecular changes, including the regulation of phytohormones. This review focuses on the role of each phytohormone in establishing symbiosis. It encases phytohormone modulation, exogenous application of the hormones, and mutant studies. The review also comments on the plausible phytohormone cross-talk essential for maintaining balanced mycorrhization and preventing fungal parasitism. Finally, we briefly discuss AMF-mediated stress regulation and contribution of phytohormone modulation in plants. We must examine their interplay to understand how phytohormones act species-specific or concentration-dependent manner. The review summarizes the gaps in these studies to improve our understanding of processes underlying plant-AMF symbiosis.