Modulation of the Root Microbiome by Plant Molecules: The Basis for Targeted Disease Suppression and Plant Growth Promotion

Frontiers in Plant Science, Journal Year: 2020, Volume and Issue: 10

Published: Jan. 24, 2020

Plants host a mesmerizing diversity of microbes inside and around their roots, known as the microbiome. The microbiome is composed mostly fungi, bacteria, oomycetes, archaea that can be either pathogenic or beneficial for plant health fitness. To grow healthy, plants need to surveil soil niches roots detection microbes, in parallel maximize services nutrients uptake growth promotion. employ palette mechanisms modulate including structural modifications, exudation secondary metabolites coordinated action different defence responses. Here, we review current understanding on composition activity root how molecules shape structure root-associated microbial communities. Examples are given interactions occur rhizosphere between soilborne fungi. We also present some well-established examples harnessing highlight fitness by selecting Understanding manipulate aid design next-generation inoculants targeted disease suppression enhanced growth.

Language: Английский

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Systemic propagation of immunity in plants

New Phytologist, Journal Year: 2020, Volume and Issue: 229(3), P. 1234 - 1250

Published: Sept. 26, 2020

Systemic immunity triggered by local plant-microbe interactions is studied as systemic acquired resistance (SAR) or induced (ISR) depending on the site of induction and lifestyle inducing microorganism. SAR pathogens interacting with leaves, whereas ISR beneficial microbes roots. Although salicylic acid (SA) a central component SAR, additional signals exclusively promote not immunity. These cooperate in SAR- possibly also ISR-associated signaling networks that regulate The non-SA pathway driven pipecolic its presumed bioactive derivative N-hydroxy-pipecolic acid. This further regulates inter-plant defense propagation through volatile organic compounds are emitted SAR-induced plants recognized cues neighboring plants. Both influence phytohormone crosstalk towards enhanced against pathogens, which at same time affects composition plant microbiome. potentially leads to changes defense, plant-microbe, plant-plant interactions. Therefore, we propose such inter-organismic could be combined highly effective protection strategies.

Language: Английский

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The Plant Microbiome: From Ecology to Reductionism and Beyond

Annual Review of Microbiology, Journal Year: 2020, Volume and Issue: 74(1), P. 81 - 100

Published: June 12, 2020

Methodological advances over the past two decades have propelled plant microbiome research, allowing field to comprehensively test ideas proposed a century ago and generate many new hypotheses. Studying distribution of microbial taxa genes across habitats has revealed importance various ecological evolutionary forces shaping microbiota. In particular, selection imposed by strongly shapes diversity composition microbiota leads adaptation associated with navigating immune system utilizing plant-derived resources. Reductionist approaches demonstrated that interaction between immunity is, in fact, bidirectional plants, microbiota, environment shape complex chemical dialogue collectively orchestrates plantmicrobiome. The next stage research will require integration reductionist establish general understanding assembly function both natural managed environments.

Language: Английский

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Rhizosphere Colonization Determinants by Plant Growth-Promoting Rhizobacteria (PGPR)

Biology, Journal Year: 2021, Volume and Issue: 10(6), P. 475 - 475

Published: May 27, 2021

The application of plant growth-promoting rhizobacteria (PGPR) in the field has been hampered by a number gaps knowledge mechanisms that improve growth, health, and production. These include (i) ability PGPR to colonize rhizosphere plants (ii) bacterial strains thrive under different environmental conditions. In this review, strategies host are summarized advantages having highly competitive discussed. Some exhibited recognition chemical signals nutrients from root exudates, antioxidant activities, biofilm production, motility, as well efficient evasion suppression immune system. Moreover, many contain secretion systems produce antimicrobial compounds, such antibiotics, volatile organic lytic enzymes enable them restrict growth potentially phytopathogenic microorganisms. Finally, compete successfully should be considered development bioinoculants.

Language: Английский

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The root microbiome: Community assembly and its contributions to plant fitness

Journal of Integrative Plant Biology, Journal Year: 2022, Volume and Issue: 64(2), P. 230 - 243

Published: Jan. 14, 2022

The root microbiome refers to the community of microbes living in association with a plant's roots, and includes mutualists, pathogens, commensals. Here we focus on recent advances study commensal which is major research object microbiome-related researches. With rapid development new technologies, plant-commensal interactions can be explored unprecedented breadth depth. Both soil environment host plant drive assembly. bulk seed bank potential commensals, plants use exudates immune responses build healthy microbial communities from available microbes. extends functional system by participating variety processes, including nutrient absorption, growth promotion, resistance biotic abiotic stresses. Plants their microbiomes have evolved adaptation strategies over time. However, there still huge gap our understanding regulatory mechanisms interactions. In this review, summarize assembly effects these development, look at prospects for promoting sustainable agricultural through microbiome.

Language: Английский

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Rhizosphere community selection reveals bacteria associated with reduced root disease

Microbiome, Journal Year: 2021, Volume and Issue: 9(1)

Published: April 9, 2021

Abstract Background Microbes benefit plants by increasing nutrient availability, producing plant growth hormones, and protecting against pathogens. However, it is largely unknown how change root microbial communities. Results In this study, we used a multi-cycle selection system infection the soilborne fungal pathogen Rhizoctonia solani AG8 (hereafter AG8) to examine impact rhizosphere bacterial community recruit beneficial microorganisms suppress pathogens promote growth. Successive plantings dramatically enhanced disease suppression on susceptible wheat cultivars in greenhouse. Accordingly, analysis of soil using deep sequencing 16S rRNA genes revealed distinct profiles assembled over successive plantings. Moreover, cluster communities formed from AG8-infected was those without infection. Interestingly, with lowest gradually separated worst planting cycles. monocultures application increased abundance some genera which have potential antagonistic activities, such as Chitinophaga , Pseudomonas Chryseobacterium Flavobacterium group growth-promoting (PGP) nitrogen-fixing microbes, including Pedobacter Variovorax Rhizobium . Furthermore, 47 bacteria isolates belong 35 species were isolated. Among them, eleven five exhibited activities oryzae vitro respectively. Notably, Janthinobacterium displayed broad antagonism Pythium ultimum AG8, R. suppressive activity soil. Conclusions Our results demonstrated that can shape specifically accumulate microbes. findings suggest may offer for addressing agronomic concerns associated diseases crop productivity.

Language: Английский

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A Journey from Structure to Function of Bacterial Lipopolysaccharides

Chemical Reviews, Journal Year: 2021, Volume and Issue: 122(20), P. 15767 - 15821

Published: July 21, 2021

Lipopolysaccharide (LPS) is a crucial constituent of the outer membrane most Gram-negative bacteria, playing fundamental role in protection bacteria from environmental stress factors, drug resistance, pathogenesis, and symbiosis. During last decades, LPS has been thoroughly dissected, massive information on this fascinating biomolecule now available. In Review, we will give reader third millennium update current knowledge with key inherent peculiar carbohydrate chemistry due to often puzzling sugar residues that are uniquely found it. Then, drive through complex multifarious immunological outcomes any given can raise, which strictly dependent its chemical structure. Further, argue about issues still remain unresolved would represent immediate future research. It critical address these points complete our notions chemistry, functions, roles, turn leading innovative ways manipulate processes involving such controversial intriguing biomolecule.

Language: Английский

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Deciphering bacterial mechanisms of root colonization

Environmental Microbiology Reports, Journal Year: 2021, Volume and Issue: 13(4), P. 428 - 444

Published: Feb. 5, 2021

Bacterial colonization of the rhizosphere is critical for establishment plant-bacteria interactions that represent a key determinant plant health and productivity. Plants influence bacterial primarily through modulating composition their root exudates mounting an innate immune response. The outcome horizontal filtering bacteria from surrounding soil, resulting in gradient reduced diversity coupled with higher degree specialization towards root. Bacteria-bacteria (BBIs) are also prevalent rhizosphere, influencing persistence metabolic exchanges, secretion antimicrobial compounds other processes. Traditionally, has been examined under sterile laboratory conditions mitigate BBIs. Using simplified synthetic communities combined microfluidic imaging platforms transposon mutagenesis screening approaches, we now able to begin unravelling molecular mechanisms at play during early stages colonization. This review explores current state knowledge regarding identifies tools future exploration.

Language: Английский

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Specific modulation of the root immune system by a community of commensal bacteria

Proceedings of the National Academy of Sciences, Journal Year: 2021, Volume and Issue: 118(16)

Published: April 16, 2021

Significance In natural environments, plants establish intimate interactions with a wide diversity of microbes. It is unknown, however, how microbiota composed commensal bacteria colonize roots in the face sophisticated plant immune system that evolved to recognize microbial-associated molecular patterns. We investigate interaction between function and root microbiota. report root-associated actively suppress host response context community. Suppressors nonsuppressors co-occur microbiome presence former can enhance colonization ability latter. highlight role specific sector its suppression gating microbial access roots.

Language: Английский

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Rhizosphere Microbiome: The Emerging Barrier in Plant-Pathogen Interactions

Frontiers in Microbiology, Journal Year: 2021, Volume and Issue: 12

Published: Oct. 29, 2021

In the ecosystem, microbiome widely exists in soil, animals, and plants. With rapid development of computational biology, sequencing technology omics analysis, important role soil beneficial microbial community is being revealed. this review, we mainly summarized roles rhizosphere microbiome, revealing its complex pervasive nature contributing to largely invisible interaction with The manipulated microorganisms function as an indirect layer plant immune system by acting a barrier pathogen invasion or inducing systemic resistance. Specifically, could change recruit communities through root-type-specific metabolic properties, positively shape their response invasion. Meanwhile, plants microbes exhibit abilities avoid excessive responses for reciprocal symbiosis. Substantial lines evidence show pathogens might utilize secreting proteins/effectors overcome emerging peripheral advantage turn. Overall, are involved plant–pathogen interactions, power potential explored explained aim effectively increase growth productivity.

Language: Английский

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