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Purpose <p>Arbuscular mycorrhizal fungi (AMF) is widely recognized as a biological fertiliser and plays an important role in plant growth. However, the impact of AMF on nutrient accumulation in plants and the rhizosphere environment under nitrogen (N) deposition remains relatively limited.</p> Methods <p>This study aimed to ascertain the effects of AMF inoculation on the rhizosphere environment and the element uptake of Chinese fir seedlings under simulated N deposition and phosphorus (P) addition. Specifically, the experiment determined the concentrations of carbon (C), N and P in plant tissues. In addition, the contents of root exudates, soil enzymes activities and soil nutrient contents were determined.</p> Results <p>N deposition enhanced the secretion of root organic acids and increased soil enzyme activities while reducing leaf P content. P addition under simulated N deposition decreased the specific soil enzymes activities, thereby facilitating the accumulation of P in leaves and both N and P in roots. The combined effects of AMF inoculation, N and P addition changed the secretion of hydroxybenzoic acid, p-hydroxycinnamic acid, ferulic acid, and total organic acids in the roots, as well as the activities of soil β-glucosidase, soil leucine aminopeptidase and N-acetyl-β-D-glucosidase, and peroxidase. Furthermore, a substantial increase was observed in leaf C, N, and P contents, accompanied by elevated levels of soil available nitrogen and available phosphorus. The synergistic interaction between AMF, N30 and P20 treatments maximally promoted the growth of Chinese fir seedlings.</p> Conclusion <p>Our results demonstrated that AMF inoculation with N and P addition could influenced root exudate secretion, thus modulating plant response to soil environmental changes. These changes in turn affect soil enzyme activities and nutrient uptake, indicating an integrated regulatory process that AMF‑mediated nutrient acquisition and allocation strategies. Although our results were based on seedling experiments and need more forestry practices, these findings provide the reference for the improvement of forest productivity.</p>

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Enhanced nutrient uptake in Chinese fir seedlings driven by arbuscular mycorrhizal fungi through rhizosphere modulation under N and P additions

  • 期刊论文

  • 发表日期：

    2026年4月6日

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  • Sumei Wu,
  • Lita Yi,
  • Xiaoyun Li,
  • Bingping Gan,
  • Quan Li,
  • Meihua Liu

摘要

Purpose

Arbuscular mycorrhizal fungi (AMF) is widely recognized as a biological fertiliser and plays an important role in plant growth. However, the impact of AMF on nutrient accumulation in plants and the rhizosphere environment under nitrogen (N) deposition remains relatively limited.

Methods

This study aimed to ascertain the effects of AMF inoculation on the rhizosphere environment and the element uptake of Chinese fir seedlings under simulated N deposition and phosphorus (P) addition. Specifically, the experiment determined the concentrations of carbon (C), N and P in plant tissues. In addition, the contents of root exudates, soil enzymes activities and soil nutrient contents were determined.

Results

N deposition enhanced the secretion of root organic acids and increased soil enzyme activities while reducing leaf P content. P addition under simulated N deposition decreased the specific soil enzymes activities, thereby facilitating the accumulation of P in leaves and both N and P in roots. The combined effects of AMF inoculation, N and P addition changed the secretion of hydroxybenzoic acid, p-hydroxycinnamic acid, ferulic acid, and total organic acids in the roots, as well as the activities of soil β-glucosidase, soil leucine aminopeptidase and N-acetyl-β-D-glucosidase, and peroxidase. Furthermore, a substantial increase was observed in leaf C, N, and P contents, accompanied by elevated levels of soil available nitrogen and available phosphorus. The synergistic interaction between AMF, N30 and P20 treatments maximally promoted the growth of Chinese fir seedlings.

Conclusion

Our results demonstrated that AMF inoculation with N and P addition could influenced root exudate secretion, thus modulating plant response to soil environmental changes. These changes in turn affect soil enzyme activities and nutrient uptake, indicating an integrated regulatory process that AMF‑mediated nutrient acquisition and allocation strategies. Although our results were based on seedling experiments and need more forestry practices, these findings provide the reference for the improvement of forest productivity.