Effect of a Bacillus subtilis strain on flax protection against Fusarium oxysporum and its impact on the root and stem cell walls
Abstract
In Normandy, flax is a plant of important economic interest because of its fibres. Fusarium oxysporum, a telluric fungus, is responsible for the major losses in crop yield and fibre quality. Several methods are currently used to limit the use of phytochemicals on crops. One of them is the use of plant growth promoting rhizobacteria (PGPR) occurring naturally in the rhizosphere. PGPR are known to act as local antagonists to soil-borne pathogens and to enhance plant resistance by eliciting the induced systemic resistance (ISR). In this study, we first investigated the cell wall modifications occurring in roots and stems after inoculation with the fungus in two flax varieties. First, we showed that both varieties displayed different cell wall organization and that rapid modifications occurred in roots and stems after inoculation. Then, we demonstrated the efficiency of a Bacillus subtilis strain to limit Fusarium wilt on both varieties with a better efficiency for one of them. Finally, thermo-gravimetry was used to highlight that B. subtilis induced modifications of the stem properties, supporting a reinforcement of the cell walls. Our findings suggest that the efficiency and the mode of action of the PGPR B. subtilis is likely to be flax variety dependent.
Related
- Swimming of bacterium Bacillus subtilis with multiple bundles of flagella
- Crystal Structure of Bacillus subtilis Cysteine Desulfurase SufS and Its Dynamic Interaction with Frataxin and Scaffold Protein SufU.
- Bacillus subtilis Bactofilins Are Essential for Flagellar Hook- and Filament Assembly and Dynamically Localize into Structures of Less than 100 nm Diameter underneath the Cell Membrane.
- Sporulation modulates viscoelastic development through extracellular matrix restructuring in Bacillus subtilis biofilms
- Identification of Poly-N-acetylglucosamine as a Major Polysaccharide Component of the Bacillus subtilis Biofilm Matrix
BibTeX
@article{planchon2026effect,
title = {{Effect of a Bacillus subtilis strain on flax protection against Fusarium oxysporum and its impact on the root and stem cell walls}},
author = {Aline Planchon and Gaëlle Durambur and Jean‐baptiste Besnier and Carole Plasson and Bruno Gügi and Sophie Bernard and Annabelle Mérieau and Jean‐paul Trouvé and Caroline Dubois and Karine Laval and Azeddine Driouich and Jean-Claude Mollet and Richard Gattin},
journal = {Plant, Cell and Environment},
year = {2026},
month = oct,
doi = {10.1111/pce.13882},
url = {https://normandie-univ.hal.science/hal-02932988v1},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Effect of a Bacillus subtilis strain on flax protection against Fusarium oxysporum and its impact on the root and stem cell walls
AU - Aline Planchon
AU - Gaëlle Durambur
AU - Jean‐baptiste Besnier
AU - Carole Plasson
AU - Bruno Gügi
AU - Sophie Bernard
AU - Annabelle Mérieau
AU - Jean‐paul Trouvé
AU - Caroline Dubois
AU - Karine Laval
AU - Azeddine Driouich
AU - Jean-Claude Mollet
AU - Richard Gattin
PY - 2026
DA - 2026/10/20
JO - Plant, Cell and Environment
DO - 10.1111/pce.13882
UR - https://normandie-univ.hal.science/hal-02932988v1
AB - In Normandy, flax is a plant of important economic interest because of its fibres. Fusarium oxysporum, a telluric fungus, is responsible for the major losses in crop yield and fibre quality. Several methods are currently used to limit the use of phytochemicals on crops. One of them is the use of plant growth promoting rhizobacteria (PGPR) occurring naturally in the rhizosphere. PGPR are known to act as local antagonists to soil-borne pathogens and to enhance plant resistance by eliciting the induced systemic resistance (ISR). In this study, we first investigated the cell wall modifications occurring in roots and stems after inoculation with the fungus in two flax varieties. First, we showed that both varieties displayed different cell wall organization and that rapid modifications occurred in roots and stems after inoculation. Then, we demonstrated the efficiency of a Bacillus subtilis strain to limit Fusarium wilt on both varieties with a better efficiency for one of them. Finally, thermo-gravimetry was used to highlight that B. subtilis induced modifications of the stem properties, supporting a reinforcement of the cell walls. Our findings suggest that the efficiency and the mode of action of the PGPR B. subtilis is likely to be flax variety dependent.
SN - 0140-7791
SN - 1365-3040
ER -