Biocontrol mechanism by root-associated Bacillus amyloliquefaciens FZB42 – a review

By S. Chowdhury, Anton Hartmann, Xuewen Gao, Rainer Borriss. Frontiers in Microbiology, 2015

625 citations recorded by the source corpus.

Bacillus amyloliquefaciens subsp. plantarum FZB42 is a Gram-positive model bacterium for unraveling plant–microbe interactions in Bacilli. In addition, FZB42 is used commercially as biofertilizer and biocontrol agent in agriculture. Genome analysis of FZB42 revealed that nearly 10% of the FZB42 genome is devoted to synthesizing antimicrobial metabolites and their corresponding immunity genes. However, recent investigations in planta demonstrated that – except surfactin – the amount of such compounds found in vicinity of plant roots is relatively low, making doubtful a direct function in suppressing competing microflora including plant pathogens. These metabolites have been also suspected to induce changes within the rhizosphere microbial community, which might affect environment and plant health. However, sequence analysis of rhizosphere samples revealed only marginal changes in the root microbiome, suggesting that secondary metabolites are not the key factor in protecting plants from pathogenic microorganisms. On the other hand, adding FZB42 to plants compensate, at least in part, changes in the community structure caused by the pathogen, indicating an interesting mechanism of plant protection by beneficial Bacilli. Sub-lethal concentrations of cyclic lipopeptides and volatiles produced by plant-associated Bacilli trigger pathways of induced systemic resistance (ISR), which protect plants against attacks of pathogenic microbes, viruses, and nematodes. Stimulation of ISR by bacterial metabolites is likely the main mechanism responsible for biocontrol action of FZB42.

Subfields: Plant Science

View Paper: https://www.semanticscholar.org/paper/1a53f6cd2f866c77866b5688bff4afbb8d939d56

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1. A. Sessitsch
2. S. Compant
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4. Sheng Qin
5. A. Hashem
6. Peng Ding
7. Wei-Wei Feng
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Citations in the corpus

• Biological control of the soil-borne fungal pathogen Sclerotinia sclerotiorum –– a review (2018, background): “However, a recent investigation demonstrated that the amount of antifungal or antibacterial compounds released by this bacteria in the rhizosphere is relatively low, raising doubts that a direct suppression of plant pathogens plays a major role (Chowdhury et al. 2015).”
• Plant growth-promoting effect and genomic analysis of the beneficial endophyte Streptomyces sp. KLBMP 5084 isolated from halophyte Limonium sinense (2017, background): “The use of PGPB is gaining increasing interest in agriculture as a promising alternative for enhancing seed germination, plant development and crop yields under stress conditions (Nadeem et al. 2014; Chowdhury et al. 2015; Qu et al. 2016).”
• Impact of seaweeds on agricultural crop production as biofertilizer (2017, background): “For example, in biocontrol active Bacilli it has been shown that antibiotically active secondary metabolites not only inhibit phytopathogens but are also able to trigger plant resistance mechanisms (Chowdhury et al. 2015).”
• Bacillus: A Biological Tool for Crop Improvement through Bio-Molecular Changes in Adverse Environments (2017, background): “The antagonistic activity of Bacillus spp. controls the mycelial growth of fungi, preventing plant fungal disease (Abdalla, 2015; Chowdhury et al., 2015a; Akram et al., 2016; Aydi-Ben-Abdallah et al., 2016) and increasing plant growth and yield (Narasimhan and Shivakumar, 2015).”
• A review on the plant microbiome: Ecology, functions, and emerging trends in microbial application (2019, background): “[71] Chowdhury SP, Hartmann A, Gao XW, Boriss R. Biocontrol mechanism by root-associated Bacillus amyloliquefaciens FZB42 – a review.”