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The use of Bacillus spp. as bacterial biocontrol agents to control plant diseases

Code: 9781801462518
Adrien Anckaert, Anthony Arguelles Arias and Grégory Hoff, Gembloux Agro-Bio Tech, ULiege (University of Liège), Belgium; Maryline Calonne-Salmon and Stéphane Declerck, UCLouvain (University of Louvain-la-Neuve), Belgium; and Marc Ongena, Gembloux Agro-Bio Tech, ULiege (University of Liège), Belgium

Chapter synopsis: Biocontrol agents (BCAs) based on plant growth promoting rhizobacteria have recently been developed as alternatives to chemical pesticides. Among those beneficial bacteria, Bacillus spp. are one of the most promising BCAs. A wide range of bioactive secondary metabolites (BSMs) are involved in biocontrol via antibiosis to phytopathogens and/or via elicitation of systemic resistance in their host plants. This chapter illustrates the diversity of pathosystems in which BCA based on Bacillus spp. have proved effective. It describes the mechanisms underpinning this biocontrol activity via production of a wide range of enzymes, proteins and small-size BSMs. As these BSMs are clearly involved in pathogen control, we emphasise the importance of understanding the ecological factors influencing their production. In the last part of the chapter, we highlight the potential interactions between Bacillus spp. and other soil microorganisms in developing consortia of biocontrol agents combining species with synergistic activities for plant health improvement.

DOI: 10.19103/AS.2021.0093.10

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Table of contents 1 Introduction 2 Bacillus spp. as biocontrol agents (BCAs) 3 The diversity of Bacillus spp. metabolites involved in biocontrol 4 Bacillus spp. biocontrol mechanisms: root colonization 5 Bacillus spp. biocontrol mechanisms: antagonistic activity 6 Bacillus spp. biocontrol mechanisms: induced systemic resistance 7 Factors influencing the production of bioactive secondary metabolites: cellular regulation 8 Factors influencing the production of bioactive secondary metabolites: biofilm formation 9 Factors influencing the production of bioactive secondary metabolites: abiotic factors 10 Factors influencing the production of bioactive secondary metabolites: biotic factors 11 Interactions of Bacillus spp. with other beneficial microorganisms and their use in biocontrol 12 Conclusions and future trends 13 Funding 14 Where to look for further information 15 References

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