Keystone taxa as drivers of microbiome structure and functioning

Nature Reviews Microbiology, Journal Year: 2018, Volume and Issue: 16(9), P. 567 - 576

Published: May 22, 2018

Language: Английский

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Plant Growth-Promoting Rhizobacteria: Context, Mechanisms of Action, and Roadmap to Commercialization of Biostimulants for Sustainable Agriculture

Frontiers in Plant Science, Journal Year: 2018, Volume and Issue: 9

Published: Oct. 23, 2018

Microbes of the phytomicrobiome are associated with every plant tissue and, in combination form holobiont. Plants regulate composition and activity their bacterial community carefully. These microbes provide a wide range services benefits to plant; return, provides microbial reduced carbon other metabolites. Soils generally moist environment, rich which supports extensive soil communities. The rhizomicrobiome is great importance agriculture owing diversity root exudates cell debris that attract diverse unique patterns colonization. play key roles nutrient acquisition assimilation, improved texture, secreting modulating extracellular molecules such as hormones, secondary metabolites, antibiotics various signal compounds, all leading enhancement growth. compounds they secrete constitute valuable biostimulants pivotal stress responses. Research has demonstrated inoculating plants plant-growth promoting rhizobacteria (PGPR) or treating microbe-to-plant can be an effective strategy stimulate crop Furthermore, these strategies improve tolerance for abiotic stresses (egs. drought, heat, salinity) likely become more frequent climate change conditions continue develop. This discovery resulted multifunctional PGPR-based formulations commercial agriculture, minimize use synthetic fertilizers agrochemicals. review update about role PGPR from collection commercialization low-cost agricultural inputs. First, we introduce concept context underlying food security 21st century. Next, mechanisms growth promotion by discussed, including exchange between roots how relationships modulate responses via induced systemic resistance. On application side, discussed rhizosphere colonization inoculants. final sections paper describe applications century roadmap technology.

Language: Английский

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Agricultural intensification reduces microbial network complexity and the abundance of keystone taxa in roots

The ISME Journal, Journal Year: 2019, Volume and Issue: 13(7), P. 1722 - 1736

Published: March 8, 2019

Root-associated microbes play a key role in plant performance and productivity, making them important players agroecosystems. So far, very few studies have assessed the impact of different farming systems on root microbiota it is still unclear whether agricultural intensification influences structure complexity microbial communities. We investigated conventional, no-till, organic wheat fungal communities using PacBio SMRT sequencing samples collected from 60 farmlands Switzerland. Organic harbored much more complex network with significantly higher connectivity than conventional no-till systems. The abundance keystone taxa was highest under where lowest. also found strong negative association (R2 = 0.366; P < 0.0001) between connectivity. occurrence best explained by soil phosphorus levels, bulk density, pH, mycorrhizal colonization. majority are known to form arbuscular associations plants belong orders Glomerales, Paraglomerales, Diversisporales. Supporting this, fungi roots soils farming. To our knowledge, this first study report for agroecosystems, we demonstrate that reduces microbiome.

Language: Английский

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Research priorities for harnessing plant microbiomes in sustainable agriculture

PLoS Biology, Journal Year: 2017, Volume and Issue: 15(3), P. e2001793 - e2001793

Published: March 28, 2017

Feeding a growing world population amidst climate change requires optimizing the reliability, resource use, and environmental impacts of food production. One way to assist in achieving these goals is integrate beneficial plant microbiomes—i.e., those enhancing growth, nutrient use efficiency, abiotic stress tolerance, disease resistance—into agricultural This integration will require large-scale effort among academic researchers, industry farmers understand manage plant-microbiome interactions context modern systems. Here, we identify priorities for research this area: (1) develop model host–microbiome systems crop plants non-crop with associated microbial culture collections reference genomes, (2) define core microbiomes metagenomes systems, (3) elucidate rules synthetic, functionally programmable microbiome assembly, (4) determine functional mechanisms interactions, (5) characterize refine genotype-by-environment-by-microbiome-by-management interactions. Meeting should accelerate our ability design implement effective manipulations management strategies, which, turn, pay dividends both consumers producers supply.

Language: Английский

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Cropping practices manipulate abundance patterns of root and soil microbiome members paving the way to smart farming

Microbiome, Journal Year: 2018, Volume and Issue: 6(1)

Published: Jan. 16, 2018

Harnessing beneficial microbes presents a promising strategy to optimize plant growth and agricultural sustainability. Little is known which extent how specifically soil microbiomes can be manipulated through different cropping practices. Here, we investigated wheat root microbial communities in system experiment consisting of conventional organic managements, both with tillage intensities. While richness was marginally affected, found pronounced effects on community composition, were specific for the respective microbiomes. Soil bacterial primarily structured by tillage, whereas fungal responded mainly management type additional tillage. In roots, also driving factor bacteria but not fungi, generally determined changes intensity. To quantify an "effect size" microbiota manipulation, that about 10% variation explained tested Cropping sensitive taxonomically diverse, they guilds taxa These included frequent members or co-occurring many other community, suggesting practices may allow manipulation influential members. Understanding abundance patterns basis towards developing strategies smart farming. For future targeted management—e.g., foster certain practices—a next step will identify functional traits microbes.

Language: Английский

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Host selection shapes crop microbiome assembly and network complexity

New Phytologist, Journal Year: 2020, Volume and Issue: 229(2), P. 1091 - 1104

Published: Aug. 27, 2020

Plant microbiomes are essential to host health and productivity but the ecological processes that govern crop microbiome assembly not fully known. Here we examined bacterial communities across 684 samples from soils (rhizosphere bulk soil) multiple compartment niches (rhizoplane, root endosphere, phylloplane, leaf endosphere) in maize (Zea mays)-wheat (Triticum aestivum)/barley (Hordeum vulgare) rotation system under different fertilization practices at two contrasting sites. Our results demonstrate along soil-plant continuum is shaped predominantly by niche species rather than site or practice. From epiphytes endophytes, selection pressure sequentially increased diversity network complexity consequently reduced, with strongest effect endosphere. Source tracking indicates mainly derived gradually enriched filtered plant niches. Moreover, were dominated a few dominant taxa (c. 0.5% of phylotypes), bacilli identified as important biomarker for wheat barley Methylobacteriaceae maize. work provides comprehensive empirical evidence on selection, potential sources enrichment assembly, has implications future management manipulation sustainable agriculture.

Language: Английский

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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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From hairballs to hypotheses–biological insights from microbial networks

FEMS Microbiology Reviews, Journal Year: 2018, Volume and Issue: 42(6), P. 761 - 780

Published: July 25, 2018

Microbial networks are an increasingly popular tool to investigate microbial community structure, as they integrate multiple types of information and may represent systems-level behaviour. Interpreting these is not straightforward, the biological implications network properties unclear. Analysis allows researchers predict hub species interactions. Additionally, such analyses can help identify alternative states niches. Here, we review factors that result in spurious predictions address emergent be meaningful context microbiome. We also give overview studies analyse new hypotheses. Moreover, show a simulation how affected by choice environmental factors. For example, consistent across tools, heterogeneity induces modularity. highlight need for robust inference suggest strategies infer more reliably.

Language: Английский

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The seed microbiome: Origins, interactions, and impacts

Plant and Soil, Journal Year: 2017, Volume and Issue: 422(1-2), P. 7 - 34

Published: May 24, 2017

Language: Английский

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The soil microbiome — from metagenomics to metaphenomics

Current Opinion in Microbiology, Journal Year: 2018, Volume and Issue: 43, P. 162 - 168

Published: Feb. 15, 2018

Soil microorganisms carry out important processes, including support of plant growth and cycling carbon other nutrients. However, the majority soil microbes have not yet been isolated their functions are largely unknown. Although metagenomic sequencing reveals microbial identities functional gene information, it includes DNA from with vastly varying physiological states. Therefore, metagenomics is only predictive community potential. We posit that next frontier lies in understanding metaphenome, product combined genetic potential microbiome available resources. Here we describe examples opportunities towards gaining metaphenome.

Language: Английский

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