Plant growth-promoting rhizobacteria (PGPR): Their potential as antagonists and biocontrol agents

By A. Beneduzi, A. Ambrosini, L. Passaglia. Genetics and Molecular Biology, 2012

1,215 citations recorded by the source corpus.

Bacteria that colonize plant roots and promote plant growth are referred to as plant growth-promoting rhizobacteria (PGPR). PGPR are highly diverse and in this review we focus on rhizobacteria as biocontrol agents. Their effects can occur via local antagonism to soil-borne pathogens or by induction of systemic resistance against pathogens throughout the entire plant. Several substances produced by antagonistic rhizobacteria have been related to pathogen control and indirect promotion of growth in many plants, such as siderophores and antibiotics. Induced systemic resistance (ISR) in plants resembles pathogen-induced systemic acquired resistance (SAR) under conditions where the inducing bacteria and the challenging pathogen remain spatially separated. Both types of induced resistance render uninfected plant parts more resistant to pathogens in several plant species. Rhizobacteria induce resistance through the salicylic acid-dependent SAR pathway, or require jasmonic acid and ethylene perception from the plant for ISR. Rhizobacteria belonging to the genera Pseudomonas and Bacillus are well known for their antagonistic effects and their ability to trigger ISR. Resistance-inducing and antagonistic rhizobacteria might be useful in formulating new inoculants with combinations of different mechanisms of action, leading to a more efficient use for biocontrol strategies to improve cropping systems.

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Citations in the corpus

• Antagonistic features displayed by Plant Growth Promoting Rhizobacteria (PGPR): A Review (2017, background): “putida produce the pseudofactin siderophore that have ability to abolish the Fusarium oxysporum and Rhizoctonia solani from rhizosphere by lowering iron availability in soil [2].”
• Microbial siderophores and their potential applications: a review (2016, background): “Siderophores bind with the iron tightly and reduce the bioavailable iron for the plant pathogens, thus facilitating the killing of phyto-pathogens (Beneduzi et al. 2012; Ahmed and Holmstrom 2014).”
• Role of Plant Growth Promoting Rhizobacteria in Agricultural Sustainability—A Review (2016, unknown): “Pseudomonas Siderophore production Potato, maize [43]”
• Plant growth promoting rhizobacteria are more effective under drought: a meta-analysis (2017, background): “…influence nutrient acquisition, modulate hormone levels, and ameliorate the negative impacts of biotic and abiotic stressors (Kloepper 1992; Rudrappa et al. 2008; Hartmann et al. 2009; Lugtenberg and Kamilova 2009; Beneduzi et al. 2012; Ahemad and Kibret 2014; Ngumbi and Kloepper 2016).”
• Trichoderma-based Products and their Widespread Use in Agriculture (2014, result): “The reaction of the plant to the BCA is similar to the ISR elicited by rhizobacteria [70] [71] [72] [73] [74] [75] [76].”
• Bacillus subtilis Strains with Antifungal Activity against the Phytopathogenic Fungi (2017, background): “Among those, bacilli and pseudomonads are the most common isolates [1] [2] [3] [4].”