Biocontrol of soil borne diseases by plant growth promoting rhizobacteria

Abdelaziz, Amer M.; Hashem, Amr H.; El-Sayyad, Gharieb S.; El-Wakil, Deiaa A.; Selim, Samy; Alkhalifah, Dalal Hussien M.; Attia, Mohamed S.

doi:10.1007/s40858-022-00544-7

Cited by 40 publications

(19 citation statements)

References 211 publications

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“…One well-known example are the fluorescent Pseudomonas, which produce a potent siderophore pyoverdine, along with other genes responsible for synthesizing additional iron chelators in their genomes. These microorganisms have been extensively studied for their application in biocontrol [90]. Multiple fluorescent Pseudomonas species utilize this mechanism in biocontrol applications [91][92][93].…”

Section: Competition For Ironmentioning

confidence: 99%

“…Multiple fluorescent Pseudomonas species utilize this mechanism in biocontrol applications [91][92][93]. However, several studies have reported the direct antimicrobial action of siderophores toward bacteria and fungi [90][91][92][93], suggesting their activity in antibiosis, not competition "sensu stricto". For example, Pseudomonas donghuensis produces two alternative iron chelators, pyoverdine and 7-hydroxytropolon [94].…”

Section: Competition For Ironmentioning

confidence: 99%

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Microbial Consortia for Plant Protection against Diseases: More than the Sum of Its Parts

Maciag,

Kozieł,

Rusin

et al. 2023

IJMS

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Biological plant protection presents a promising and exciting alternative to chemical methods for safeguarding plants against the increasing threats posed by plant diseases. This approach revolves around the utilization of biological control agents (BCAs) to suppress the activity of significant plant pathogens. Microbial BCAs have the potential to effectively manage crop disease development by interacting with pathogens or plant hosts, thereby increasing their resistance. However, the current efficacy of biological methods remains unsatisfactory, creating new research opportunities for sustainable plant cultivation management. In this context, microbial consortia, comprising multiple microorganisms with diverse mechanisms of action, hold promise in terms of augmenting the magnitude and stability of the overall antipathogen effect. Despite scientific efforts to identify or construct microbial consortia that can aid in safeguarding vital crops, only a limited number of microbial consortia-based biocontrol formulations are currently available. Therefore, this article aims to present a complex analysis of the microbial consortia-based biocontrol status and explore potential future directions for biological plant protection research with new technological advancements.

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Section: Competition For Ironmentioning

confidence: 99%

Section: Competition For Ironmentioning

confidence: 99%

Microbial Consortia for Plant Protection against Diseases: More than the Sum of Its Parts

Maciag,

Kozieł,

Rusin

et al. 2023

IJMS

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show abstract

“…In the last decades, several methods, including disease-resistant varieties, agricultural practices, and chemical seed coating, have been widely applied in disease control, but the yield losses are still estimated at 10–30% annually ( Casida and Durkin, 2017 ; Cao et al, 2018 ; Zhang et al, 2020 ). Recently, biological control has received more attention because of its characteristics of being environment-friendly, pollution-free, requiring less reliance on chemical products, and having no resistance problem ( Abdelaziz et al, 2023 ). Currently, some valuable biocontrol microbial agents have been constantly explored in different environmental samples and applied to the control of soybean root rot ( Chang et al, 2022 ; Xu et al, 2022 ).…”

Section: Introductionmentioning

confidence: 99%

“…In addition to the above, when host plants suffer from pathogen invasion, on the one hand, some rhizosphere PGPR act as strong competitors for space and nutrients or produce antibiotics to directly suppress, antagonistize, or kill pathogens ( Cao et al, 2018 ; Abdelaziz et al, 2023 ). On the other hand, they can also induce host resistance, typically as induced systemic resistance (ISR) ( Pieterse et al, 2014 ), which is distinguished from systemic acquired resistance (SAR) triggered by plant pathogens ( Durrant and Dong, 2004 ).…”

Section: Introductionmentioning

confidence: 99%

Pseudomonas chlororaphis IRHB3 assemblies beneficial microbes and activates JA-mediated resistance to promote nutrient utilization and inhibit pathogen attack

Wei,

Zhu,

Zhang

et al. 2024

Front. Microbiol.

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IntroductionThe rhizosphere microbiome is critical to plant health and resistance. PGPR are well known as plant-beneficial bacteria and generally regulate nutrient utilization as well as plant responses to environmental stimuli. In our previous work, one typical PGPR strain, Pseudomonas chlororaphis IRHB3, isolated from the soybean rhizosphere, had positive impacts on soil-borne disease suppression and growth promotion in the greenhouse, but its biocontrol mechanism and application in the field are not unclear.MethodsIn the current study, IRHB3 was introduced into field soil, and its effects on the local rhizosphere microbiome, disease resistance, and soybean growth were comprehensively analyzed through high-throughput sequencing and physiological and molecular methods.Results and discussionWe found that IRHB3 significantly increased the richness of the bacterial community but not the structure of the soybean rhizosphere. Functional bacteria related to phosphorus solubilization and nitrogen fixation, such as Geobacter, Geomonas, Candidatus Solibacter, Occallatibacter, and Candidatus Koribacter, were recruited in rich abundance by IRHB3 to the soybean rhizosphere as compared to those without IRHB3. In addition, the IRHB3 supplement obviously maintained the homeostasis of the rhizosphere microbiome that was disturbed by F. oxysporum, resulting in a lower disease index of root rot when compared with F. oxysporum. Furthermore, JA-mediated induced resistance was rapidly activated by IRHB3 following PDF1.2 and LOX2 expression, and meanwhile, a set of nodulation genes, GmENOD40b, GmNIN-2b, and GmRIC1, were also considerably induced by IRHB3 to improve nitrogen fixation ability and promote soybean yield, even when plants were infected by F. oxysporum. Thus, IRHB3 tends to synergistically interact with local rhizosphere microbes to promote host growth and induce host resistance in the field.

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“…These agents hold the potential to control plant diseases through promoting antibiotic production, competition, parasitism, and plant health ( Köhl et al., 2019 ; Khanna et al., 2019 ). In addition, synthesizing various antimicrobial agents or toxins in order to directly attack the pathogens also activates the systemic resistance mechanisms of plants and enhances the defense enzyme properties ( Khanna et al., 2021 ; Abdelaziz et al., 2023 ).…”

Section: Introductionmentioning

confidence: 99%

Bacillus vallismortis TU-Orga21 blocks rice blast through both direct effect and stimulation of plant defense

et al. 2023

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Beneficial microorganisms are an important strategy for sustainable plant production processes such as stimulate root exudation, stress tolerance, and yield improvement. This study investigated various microorganisms isolated from the rhizosphere of Oryza sativa L. in order to inhibit Magnaporthe oryzae cause of rice blast, by direct and indirect mode of action. The results indicated that Bacillus vallismortis strain TU–Orga21 significantly reduced M. oryzae mycelium growth and deformed the hyphal structures. The effects of biosurfactant TU–Orga21 was studied against M. oryzae spore development. The dose of ≥5% v/v biosurfactant significantly inhibited the germ tubes and appressoria formation. The biosurfactants were evaluated as surfactin and iturin A by Matrix-assisted laser desorption ionization dual time-of-flight tandem mass spectrometry. Under greenhouse conditions, priming the biosurfactant three times before M. oryzae infection significantly accumulated endogenous salicylic acid, phenolic compounds, and hydrogen peroxide (H2O2) during the infection process of M. oryzae. The SR-FT-IR spectral changes from the mesophyll revealed higher integral area groups of lipids, pectins, and proteins amide I and amide II in the elicitation sample. Furthermore, scanning electron microscope revealed appressorium and hyphal enlargement in un-elicitation leaves whereas appressorium formation and hyphal invasion were not found in biosurfactant-elicitation at 24 h post inoculation. The biosurfactant treatment significantly mitigated rice blast disease severity. Therefore, B. vallismortis can be a promising novel biocontrol agent which contains the preformed active metabolites for a rapid control of rice blast by a direct action against pathogen and by boosting plant immunity.

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Biocontrol of soil borne diseases by plant growth promoting rhizobacteria

Cited by 40 publications

References 211 publications

Microbial Consortia for Plant Protection against Diseases: More than the Sum of Its Parts

Microbial Consortia for Plant Protection against Diseases: More than the Sum of Its Parts

Pseudomonas chlororaphis IRHB3 assemblies beneficial microbes and activates JA-mediated resistance to promote nutrient utilization and inhibit pathogen attack

Bacillus vallismortis TU-Orga21 blocks rice blast through both direct effect and stimulation of plant defense

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