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Combined Use of Beneficial Bacteria and Arbuscular Mycorrhizal Fungi for the Biocontrol of Plant Cryptogamic Diseases: Evidence, Methodology, and Limits

Part of the Soil Biology book series (SOILBIOL,volume 60)

Abstract

Keeping up agricultural production, while reducing chemical inputs, under biotic and abiotic stresses, falls within a considerable challenge. Among the solutions, developing more sustainable strategies to protect crops by using biocontrol agents is a promising alternative. Several beneficial microorganisms can limit pathogen development by direct (antibiosis, competition) and/or indirect effects (plant growth promotion and resistance induction) thanks to nutritional and hormonal balance regulations. A great deal of research articles have already reported the beneficial roles of rhizobacteria or arbuscular mycorrhizal fungi (AMF) on reducing the development of fungal pathogens when applied alone, or on plant nutrition when co-inoculated; while fewer of them reviewed the co-inoculation as a mean to protect against fungal pathogens. Hence, this review aims to present recent developments on the effectiveness of the co-inoculation with beneficial bacteria and AMF for fungal disease management. Firstly, main mechanisms beneath the beneficial effects of bacterial or AMF inoculation alone on plants are recalled. Secondly, results relating their combined inoculation on disease severity are presented and sorted according to their outcomes (synergistic, neutral, or antagonistic interactions), along with the possible underlying mechanisms. Finally, we gathered the main methodologies employed in tripartite interaction experiment and brought to light future challenges for practical use.

Keywords

  • Arbuscular mycorrhizal fungi
  • Plant growth-promoting rhizobacteria
  • Mycorrhiza helper bacteria
  • Tripartite interactions
  • Fungal diseases
  • Biocontrol

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Acknowledgments

The authors wish to thank the “Université du Littoral Côte d’Opale (ULCO)” for providing financial supports for Y. Krzyzaniak post-doctoral fellowship. This work has been carried out in the framework of TRIPLET project which was supported by the partnership A2U (Artois, UPJV, ULCO) and in the framework of CPER ALIBIOTECH project which was financed by European Union, French State and the French Region of Hauts-de-France.

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Correspondence to Anissa Lounès-Hadj Sahraoui .

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Krzyzaniak, Y., Magnin-Robert, M., Randoux, B., Fontaine, J., Lounès-Hadj Sahraoui, A. (2021). Combined Use of Beneficial Bacteria and Arbuscular Mycorrhizal Fungi for the Biocontrol of Plant Cryptogamic Diseases: Evidence, Methodology, and Limits. In: Shrivastava, N., Mahajan, S., Varma, A. (eds) Symbiotic Soil Microorganisms. Soil Biology, vol 60. Springer, Cham. https://doi.org/10.1007/978-3-030-51916-2_24

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