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Poster De Conférence Année : 2023

Multi-scale study of a living yeast-based biostimulant effect on soybean

Résumé

Using biostimulants to improve crop productivity and soil fertility represent a promising agroecological practice, contributing to reduce the dependency on chemical inputs or to mitigate abiotic stresses. In a context of self-sufficiency towards plant protein for alimentation, the rise of protein crops constitutes an important issue in Europe. Soybean draws special attention because of multiple agronomic benefits and outputs. However, soybean deployment is often constrained by pedoclimatic conditions. Here, a greenhouse experiment was carried out to evaluate the potential benefit of a seed-coating treatment with a living yeast-based biostimulant on soybean. A global promotion of plant growth was observed, with a stimulation of nodulation. A multi-scale study, from plant to soil microbiome, was achieved to explore involved mechanisms of action. A proteomic analysis was performed on soybean leaves and roots collected at VC and V5 stages. This analysis showed a higher abundance of proteins involved in several pathways, such as the biosynthesis of secondary metabolites and energy metabolism for treated plants. In parallel, a transitory increase of soil microbial abundance was observed at V2 stage. Relative abundances of some bacterial and fungal genera were significantly modified at V2 and V5 stages. Microbial enzymatic activities linked to C and P cycles were enhanced whereas the one involved in N cycle was decreased at V5 stage. These results highlighted the value of living yeast-based biostimulant to sustain soybean growth. This work also emphasized the interest to consider the entire holobiont – plant with associated microbiome - to better understand the action of biostimulants.
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Dates et versions

hal-04372862 , version 1 (04-01-2024)

Identifiants

  • HAL Id : hal-04372862 , version 1

Citer

Marie Chambard, Anouk Lyver, Mohamed Amine Ben Mlouka, Elodie Cusset, Benjamin Albert, et al.. Multi-scale study of a living yeast-based biostimulant effect on soybean. Biostimulant World Congress, Nov 2023, Milano, Italy. ⟨hal-04372862⟩
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