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<p><?tk 1?>Using biostimulants to improve crop productivity represents a promising agroecological practice to reduce dependency on chemical inputs. In the context of achieving self-sufficiency in plant protein for alimentation, the rise of protein crops constitutes a major issue in Europe. Soybean draws particular attention because of its multiple agronomic benefits and outputs. However, its deployment is often constrained by pedoclimatic conditions. Here, a preliminary greenhouse experiment was carried out to evaluate the potential benefit of a seed-surfacing treatment with a living yeast-based biostimulant (YB) on soybean growth using an holistic approach exploring the underlying mechanisms in plant and soil compartments. A global promotion of plant growth was observed, mainly focused on the root compartment. Proteomic analysis performed on leaves and roots revealed increased abundance of proteins involved in key pathways, such as the biosynthesis of secondary metabolites and energy metabolism. In parallel, YB application was associated with changes in the composition of the microbial community at the early (V2) and mature (V5) stages. At V5 stage, YB tended to enhance microbial enzymatic activities linked to C cycle and significantly induced those related to P cycle. These results suggested a potential role of the living YB in promoting soybean growth and modulating plant–microbiome interactions. Further validation under field conditions and across diverse genotypes is now necessary to confirm their broader relevance. This work also emphasised the importance of considering the entire holobiont—plant with associated microbiome—to better understand the action of biostimulants.</p>

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Multi-scale Study of the Effect of a Living Yeast-Based Biostimulant on Soybean

  • 期刊论文

  • 发表日期：

    2026年1月19日

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  • Marie Chambard,
  • Anouk Lyver,
  • Mohamed Amine Ben Mlouka,
  • Benjamin Albert,
  • Camille Profizi,
  • Elodie Cusset,
  • Jean-Christophe Avice,
  • Pascal Cosette,
  • Isabelle Trinsoutrot-Gattin,
  • Isabelle Boulogne,
  • Mélanie Bressan

摘要

Using biostimulants to improve crop productivity represents a promising agroecological practice to reduce dependency on chemical inputs. In the context of achieving self-sufficiency in plant protein for alimentation, the rise of protein crops constitutes a major issue in Europe. Soybean draws particular attention because of its multiple agronomic benefits and outputs. However, its deployment is often constrained by pedoclimatic conditions. Here, a preliminary greenhouse experiment was carried out to evaluate the potential benefit of a seed-surfacing treatment with a living yeast-based biostimulant (YB) on soybean growth using an holistic approach exploring the underlying mechanisms in plant and soil compartments. A global promotion of plant growth was observed, mainly focused on the root compartment. Proteomic analysis performed on leaves and roots revealed increased abundance of proteins involved in key pathways, such as the biosynthesis of secondary metabolites and energy metabolism. In parallel, YB application was associated with changes in the composition of the microbial community at the early (V2) and mature (V5) stages. At V5 stage, YB tended to enhance microbial enzymatic activities linked to C cycle and significantly induced those related to P cycle. These results suggested a potential role of the living YB in promoting soybean growth and modulating plant–microbiome interactions. Further validation under field conditions and across diverse genotypes is now necessary to confirm their broader relevance. This work also emphasised the importance of considering the entire holobiont—plant with associated microbiome—to better understand the action of biostimulants.