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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Structural variability and niche differentiation in the rhizosphere and endosphere bacterial microbiome of field-grown poplar trees

Microbiome, Journal Year: 2017, Volume and Issue: 5(1)

Published: Feb. 23, 2017

The plant microbiome represents one of the key determinants health and productivity by providing a plethora functional capacities such as access to low-abundance nutrients, suppression phytopathogens, resistance biotic and/or abiotic stressors. However, robust understanding structural composition bacterial present in different microenvironments especially relationship between below-ground above-ground communities has remained elusive. In this work, we addressed hypotheses regarding niche differentiation stability within ecological niches. We sampled rhizosphere soil, root, stem, leaf endosphere field-grown poplar trees (Populus tremula × Populus alba) applied 16S rRNA amplicon pyrosequencing unravel associated with habitats. found that variability microbiomes (P. P. is much lower than microbiomes. Furthermore, our data not only confirm reports at soil–root interface but also clearly show additional fine-tuning adaptation stem compartment. Each compartment an unique for communities. Finally, identified core niches Populus. Understanding complex host–microbe interactions could provide basis exploitation eukaryote–prokaryote associations phytoremediation applications, sustainable crop production (bio-energy efficiency), secondary metabolites.

Language: Английский

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Compositional shifts in root-associated bacterial and archaeal microbiota track the plant life cycle in field-grown rice

PLoS Biology, Journal Year: 2018, Volume and Issue: 16(2), P. e2003862 - e2003862

Published: Feb. 23, 2018

Bacterial communities associated with roots impact the health and nutrition of host plant. The dynamics these microbial assemblies over plant life cycle are, however, not well understood. Here, we use dense temporal sampling 1,510 samples from root spatial compartments to characterize bacterial archaeal components root-associated microbiota field grown rice (Oryza sativa) course 3 consecutive growing seasons, as 2 sites in diverse geographic regions. was found be highly dynamic during vegetative phase growth then stabilized compositionally for remainder cycle. taxa conserved between were defined predictive features age by modeling using a random forest approach. age-prediction models revealed that drought-stressed plants have developmentally immature compared unstressed plants. Further, genotypes varying developmental rates, show shifts microbiome are correlated rates transitions rather than alone, such different compositions reflect juvenile adult stages. These results suggest model successional

Language: Английский

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Rhizosphere microorganisms can influence the timing of plant flowering

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

Published: Dec. 1, 2018

Plant phenology has crucial biological, physical, and chemical effects on the biosphere. Phenological drivers have largely been studied, but role of plant microbiota, particularly rhizosphere not considered. We discovered that microbial communities could modulate timing flowering Arabidopsis thaliana. Rhizosphere microorganisms increased prolonged N bioavailability by nitrification delayed converting tryptophan to phytohormone indole acetic acid (IAA), thus downregulating genes trigger flowering, stimulating further growth. The addition IAA hydroponic cultures confirmed this metabolic network. document a novel network in which soil microbiota influenced time, shedding light key functioning. This opens up multiple opportunities for application, from helping mitigate some climate change environmental stress plants (e.g. abnormal temperature variation, drought, salinity) manipulating characteristics using inocula increase crop potential.

Language: Английский

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Functional Soil Microbiome: Belowground Solutions to an Aboveground Problem

PLANT PHYSIOLOGY, Journal Year: 2014, Volume and Issue: 166(2), P. 689 - 700

Published: July 24, 2014

Abstract There is considerable evidence in the literature that beneficial rhizospheric microbes can alter plant morphology, enhance growth, and increase mineral content. Of late, there a surge to understand impact of microbiome on health. Recent research shows utilization novel sequencing techniques identify model systems such as Arabidopsis (Arabidopsis thaliana) maize (Zea mays). However, it not known how community identified may play role improve health fitness. are very few detailed studies with isolated showing importance functional fitness disease protection. Some recent work cultivated rice (Oryza sativa) wide diversity bacterial species associated roots field-grown plants. biological significance potential effects host plants completely unknown. Work performed strains showed various genetic pathways involved recognition host-specific factors roles host-microbe interactions. The composition dynamic controlled by multiple factors. In case rhizosphere, temperature, pH, presence chemical signals from bacteria, plants, nematodes all shape environment influence which organisms will flourish. This provides basis for their microbiomes selectively associate one another. Update addresses phenotypes provide sustainable effective strategy crop yield food security.

Language: Английский

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