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<p>Salt stress severely impairs agricultural productivity by disrupting plant physiological processes, degrading soil structure, and reducing crop yields by up to 50% in affected regions. <i>Serendipita indica</i> (<i>S. indica</i>) inoculation offers a sustainable strategy to combat abiotic stresses in crops. Here, we investigated the effects of <i>S. indica</i> inoculation on wheat (<i>Triticum aestivum</i>) under salt stress conditions. Results demonstrated that <i>S. indica</i> inoculated wheat exhibited remarkable improvements in growth parameters, including a 25% increase in biomass and 15% higher root development compared to non-inoculated controls under saline conditions (150 mM NaCl). <i>S. indica</i> colonization enhances photosynthetic efficiency in wheat by increasing chlorophyll content and upregulating the expression of key genes in the photosynthetic pathway. Results indicated that <i>S. indica</i> colonization enhances salt stress resistance in wheat by improving the integrity of leaf cells and significantly increasing the content of intracellular osmotic substances including proline, sugar and protein. Physiological analyses revealed that <i>S. indica</i> symbiosis boosted the plant’s salt tolerance by enhancing antioxidant enzyme activities (SOD by 1.5-fold, CAT by 1.3-fold) and reducing reactive oxygen species accumulation. Under salt stress, colonization by <i>S. indica</i> increases potassium ion content and reduces sodium ion accumulation in wheat leaves; Correspondingly, the potassium ion content in the rhizosphere soil of wheat decreases. <i>S. indica</i> inoculation was associated with concomitant changes in the rhizosphere microbial community composition, including an increased abundance of certain beneficial plant-growth-promoting bacteria. These findings suggest that <i>S. indica</i> inoculation represents a promising strategy for improving crop productivity in saline-affected soils. The concomitant shift in the microbiome presents a compelling hypothesis that microbiome-mediated mechanisms contribute to this enhanced tolerance, a premise that warrants further experimental validation.</p>

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Serendipita Indica Inoculation of Wheat (Triticum aestivum) Significantly Enhances Plant Growth and Salt Tolerance, Which is Coupled with a Concomitant Change in the Soil Rhizosphere Microbial Community

  • 期刊论文

  • 发表日期：

    2025年11月11日

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  • Li Liang,
  • Bi Zhenghui,
  • Lu Yuan

摘要

Salt stress severely impairs agricultural productivity by disrupting plant physiological processes, degrading soil structure, and reducing crop yields by up to 50% in affected regions. Serendipita indica (S. indica) inoculation offers a sustainable strategy to combat abiotic stresses in crops. Here, we investigated the effects of S. indica inoculation on wheat (Triticum aestivum) under salt stress conditions. Results demonstrated that S. indica inoculated wheat exhibited remarkable improvements in growth parameters, including a 25% increase in biomass and 15% higher root development compared to non-inoculated controls under saline conditions (150 mM NaCl). S. indica colonization enhances photosynthetic efficiency in wheat by increasing chlorophyll content and upregulating the expression of key genes in the photosynthetic pathway. Results indicated that S. indica colonization enhances salt stress resistance in wheat by improving the integrity of leaf cells and significantly increasing the content of intracellular osmotic substances including proline, sugar and protein. Physiological analyses revealed that S. indica symbiosis boosted the plant’s salt tolerance by enhancing antioxidant enzyme activities (SOD by 1.5-fold, CAT by 1.3-fold) and reducing reactive oxygen species accumulation. Under salt stress, colonization by S. indica increases potassium ion content and reduces sodium ion accumulation in wheat leaves; Correspondingly, the potassium ion content in the rhizosphere soil of wheat decreases. S. indica inoculation was associated with concomitant changes in the rhizosphere microbial community composition, including an increased abundance of certain beneficial plant-growth-promoting bacteria. These findings suggest that S. indica inoculation represents a promising strategy for improving crop productivity in saline-affected soils. The concomitant shift in the microbiome presents a compelling hypothesis that microbiome-mediated mechanisms contribute to this enhanced tolerance, a premise that warrants further experimental validation.