Mycorrhizal types differ in ecophysiology and alter plant nutrition and soil processes

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Год журнала: 2019, Номер 94(5), С. 1857 - 1880

Опубликована: Июль 3, 2019

ABSTRACT Mycorrhizal fungi benefit plants by improved mineral nutrition and protection against stress, yet information about fundamental differences among mycorrhizal types in trees their relative importance biogeochemical processes is only beginning to accumulate. We critically review synthesize the ecophysiological ectomycorrhizal, ericoid arbuscular symbioses effect of these on soil from local global scales. demonstrate that guilds display substantial genome‐encoded capacity for nutrition, particularly acquisition nitrogen phosphorus organic material. associations alter trade‐off between allocation roots or mycelium, traits such as root exudation, weathering, enzyme production, plant protection, community assembly well response climate change. exhibit differential effects ecosystem carbon nutrient cycling affect elemental fluxes may mediate biome shifts also note most studies performed date have not been properly replicated collectively suffer strong geographical sampling bias towards temperate biomes. advocate combining carefully field experiments controlled laboratory with isotope labelling ‐omics techniques offers great promise understanding ecophysiology services types.

Язык: Английский

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Metabolic regulation of the maize rhizobiome by benzoxazinoids

The ISME Journal, Год журнала: 2019, Номер 13(7), С. 1647 - 1658

Опубликована: Фев. 22, 2019

Abstract The rhizobiome is an important regulator of plant growth and health. Plants shape their communities through production release primary secondary root metabolites. Benzoxazinoids (BXs) are common tryptophan-derived metabolites in grasses that regulate belowground aboveground biotic interactions. In addition to biocidal activity, BXs can plant–biotic interactions as semiochemicals or within-plant defence signals. However, the full extent mechanisms by which root-associated microbiome has remained largely unexplored. Here, we have taken a global approach examine regulatory activity on maize metabolome associated bacterial fungal communities. Using untargeted mass spectrometry analysis combination with prokaryotic amplicon sequencing, compared impacts three genetic mutations different steps BX pathway. We show metabolism concurrently influence type-dependent manner. Correlation between BX-controlled taxa suggested dominant role for BX-dependent metabolites, particularly flavonoids, constraining range soil microbial taxa, while stimulating methylophilic bacteria. Our study supports multilateral model control root–microbe via function metabolism.

Язык: Английский

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Interactions between plants and soil shaping the root microbiome under abiotic stress

Biochemical Journal, Год журнала: 2019, Номер 476(19), С. 2705 - 2724

Опубликована: Окт. 11, 2019

Abstract Plants growing in soil develop close associations with microorganisms, which inhabit the areas around, on, and inside their roots. These microbial communities associated genes — collectively termed root microbiome are diverse have been shown to play an important role conferring abiotic stress tolerance plant hosts. In light of concerns over threat water nutrient facing terrestrial ecosystems, especially those used for agricultural production, increased emphasis has placed on understanding how conditions influence composition functioning ultimate consequences health. However, under will not only reflect shifts greater bulk community from plants recruit but also responses stress, include changes exudate profiles morphology. Exploring relative contributions these direct plant-mediated effects focus many studies recent years. Here, we review impacts affecting specifically flooding, drought, nitrogen phosphorus availability, that interact ultimately shape microbiome. We conclude a perspective outlining possible directions future research needed advance our complex molecular biochemical interactions between soil, plants, microbes determine stress.

Язык: Английский

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

Biology, Год журнала: 2021, Номер 10(6), С. 475 - 475

Опубликована: Май 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.

Язык: Английский

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Soil indigenous microbiome and plant genotypes cooperatively modify soybean rhizosphere microbiome assembly

BMC Microbiology, Год журнала: 2019, Номер 19(1)

Опубликована: Сен. 2, 2019

Plants have evolved intimate interactions with soil microbes for a range of beneficial functions including nutrient acquisition, pathogen resistance and stress tolerance. Further understanding this system is promising way to advance sustainable agriculture by exploiting the versatile benefits offered plant microbiome. The rhizosphere interface between soil, as first step defense root microbiome recruitment. It features specialized microbial community, intensive microbe-plant microbe-microbe interactions, complex signal communication. To decipher assembly soybean (Glycine max), we comprehensively characterized community using 16S rRNA gene sequencing evaluated structuring influence from both host genotype source.Comparison bulk revealed significantly different composition, metabolic capacity. Soil type cooperatively modulated predominantly shaping while slightly tuned recruitment process. undomesticated progenitor species, Glycine soja, had higher diversity in types tested comparison domesticated genotypes. Rhizobium, Novosphingobium, Phenylobacterium, Streptomyces, Nocardioides, etc. were robustly enriched irrespective tested. Co-occurrence network analysis dominant effects specific preferences key interactions. Functional prediction results demonstrated converged capacity among genotypes, pathways related xenobiotic degradation, plant-microbe transport being greatly rhizosphere.This comprehensive genotypes expands our microbe general provides foundational information legume crop cooperative modulating role emphasizes importance integrated consideration condition genetic variability future development application synthetic microbiomes. Additionally, detection tuning breeding programs integrate traits participating microbiota assembly.

Язык: Английский

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