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Background and aims <p>Phosphorus (P) from surface waters can be captured in algal biomass, which can be used as a fertilizer. We investigated the efficiency of polyculture algal biofilms produced on municipal wastewater effluent as a P fertilizer for wheat. We asked whether arbuscular mycorrhizal fungi (AMF) and the beneficial root endophyte <i>Serendipita vermifera</i> influence plant performance and P uptake.</p> Methods <p>Two pot experiments were performed with wheat fertilized with algal biofilms or highly available triple superphosphate (TSP) at a rate of 37&#xa0;mg P kg<sup>−1</sup>, corresponding to 56.8&#xa0;kg&#xa0;ha<sup>−1</sup>. In the second experiment, plants were inoculated with AMF (<i>Rhizoglomus irregulare, Funneliformis mosseae, F. geosporum), S. vermifera</i>, or both. P species contained in the algal biofilm and P release dynamics were analyzed by liquid-state <sup>31</sup>P nuclear magnetic resonance spectrometry and leachate analyses.</p> Results <p>Algal biofilms contained high levels of orthophosphate with low water solubility. P recovery by wheat was lower than from TSP, as indicated by plant total dry matter and total P. In algae-fertilized wheat, AMF reduced growth but not P uptake, while <i>S. vermifera</i> in dual inoculation with AMF mitigated the adverse effects. <i>S. vermifera</i> significantly increased root growth and P content in roots when co-inoculated with AMF.</p> Conclusion <p>Polyculture algal biomass is an effective, less leaching-prone organic P source for wheat. The synergistic effect of <i>S. vermifera</i> as a root growth-promoting fungus in its interaction with AMF shows the potential and relevance of microbial involvement in using algae-based fertilizers.</p>

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Wheat growth and phosphorus uptake from polyculture algal biofilms are synergistically modulated by arbuscular mycorrhizal fungi and Serendipita vermifera

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年5月7日

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  • Xinyu Gan,
  • Jennifer Janus,
  • Sabine Willbold,
  • Vitalij Dombinov,
  • Arnd J. Kuhn,
  • Wulf Amelung,
  • Diana Reinecke,
  • Dean Calahan,
  • Ladislav Nedbal,
  • Holger Klose,
  • Silvia D. Schrey

摘要

Background and aims

Phosphorus (P) from surface waters can be captured in algal biomass, which can be used as a fertilizer. We investigated the efficiency of polyculture algal biofilms produced on municipal wastewater effluent as a P fertilizer for wheat. We asked whether arbuscular mycorrhizal fungi (AMF) and the beneficial root endophyte Serendipita vermifera influence plant performance and P uptake.

Methods

Two pot experiments were performed with wheat fertilized with algal biofilms or highly available triple superphosphate (TSP) at a rate of 37 mg P kg−1, corresponding to 56.8 kg ha−1. In the second experiment, plants were inoculated with AMF (Rhizoglomus irregulare, Funneliformis mosseae, F. geosporum), S. vermifera, or both. P species contained in the algal biofilm and P release dynamics were analyzed by liquid-state 31P nuclear magnetic resonance spectrometry and leachate analyses.

Results

Algal biofilms contained high levels of orthophosphate with low water solubility. P recovery by wheat was lower than from TSP, as indicated by plant total dry matter and total P. In algae-fertilized wheat, AMF reduced growth but not P uptake, while S. vermifera in dual inoculation with AMF mitigated the adverse effects. S. vermifera significantly increased root growth and P content in roots when co-inoculated with AMF.

Conclusion

Polyculture algal biomass is an effective, less leaching-prone organic P source for wheat. The synergistic effect of S. vermifera as a root growth-promoting fungus in its interaction with AMF shows the potential and relevance of microbial involvement in using algae-based fertilizers.