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Aims <p>Soil salinization is a major global environmental problem. While arbuscular mycorrhizal fungi (AMF) enhance plant resistance in saline-alkali stress, the underlying mechanisms require deeper exploration.</p> Methods <p>Using <i>Perilla frutescens</i> as the experimental material, this study employed a pot experiment to examine the effects of inoculating <i>Funneliformis mosseae</i> (Fm) and <i>Rhizophagus intraradices</i> (Ri) on soil quality, plant development, and physiological responses under saline-alkali stress (200&#xa0;mM NaCl-NaHCO<sub>3</sub> mixture).</p> Results <p>Under saline-alkali stress, AMF inoculation ameliorated soil conditions and promoted the growth and nutrient acquisition of <i>P. frutescens</i>. Specifically, Fm inoculation significantly increased the available P content and urease activity by 47.57% and 40.77%, respectively, while Ri inoculation significantly increased the available K content and phosphatase activity by 22.80% and 20.32%, respectively. Furthermore, AMF inoculation alleviated oxidative damage by boosting the plant’s antioxidant defense system. Compared with the control, Fm and Ri inoculation increased CAT activity by 85.60% and 109.81%, respectively. Notably, the increased Na content in leaves and roots of AMF-inoculated plants suggests that Na sequestration might be a key mechanism through which AMF enhances the saline-alkali tolerance of <i>P. frutescens</i>. Structural equation model revealed that improvements in soil enzyme activity and soil nutrients positively regulated nutrient acquisition in <i>P. frutescens</i> (path coefficients 0.50 and 0.34), consequently significantly enhancing biomass accumulation.</p> Conclusions <p>These findings provide a basis for utilizing the symbiosis between <i>P. frutescens</i> and AMF to remediate soil salinization, facilitating the sustainable cultivation and development of economic crops through biological control technology.</p>

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Effects of arbuscular mycorrhizal fungi inoculation on soil properties and Perilla frutescens growth under saline-alkali stress

  • 期刊论文

  • 发表日期：

    2025年11月5日

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  • Yule Liu,
  • Fan Yang,
  • Xinying Liu,
  • Jingjing Jian,
  • Lingxin Xu,
  • Linyi Meng,
  • Junxin Yan

摘要

Aims

Soil salinization is a major global environmental problem. While arbuscular mycorrhizal fungi (AMF) enhance plant resistance in saline-alkali stress, the underlying mechanisms require deeper exploration.

Methods

Using Perilla frutescens as the experimental material, this study employed a pot experiment to examine the effects of inoculating Funneliformis mosseae (Fm) and Rhizophagus intraradices (Ri) on soil quality, plant development, and physiological responses under saline-alkali stress (200 mM NaCl-NaHCO3 mixture).

Results

Under saline-alkali stress, AMF inoculation ameliorated soil conditions and promoted the growth and nutrient acquisition of P. frutescens. Specifically, Fm inoculation significantly increased the available P content and urease activity by 47.57% and 40.77%, respectively, while Ri inoculation significantly increased the available K content and phosphatase activity by 22.80% and 20.32%, respectively. Furthermore, AMF inoculation alleviated oxidative damage by boosting the plant’s antioxidant defense system. Compared with the control, Fm and Ri inoculation increased CAT activity by 85.60% and 109.81%, respectively. Notably, the increased Na content in leaves and roots of AMF-inoculated plants suggests that Na sequestration might be a key mechanism through which AMF enhances the saline-alkali tolerance of P. frutescens. Structural equation model revealed that improvements in soil enzyme activity and soil nutrients positively regulated nutrient acquisition in P. frutescens (path coefficients 0.50 and 0.34), consequently significantly enhancing biomass accumulation.

Conclusions

These findings provide a basis for utilizing the symbiosis between P. frutescens and AMF to remediate soil salinization, facilitating the sustainable cultivation and development of economic crops through biological control technology.