Rhizosphere bacteriome structure and functions

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: Feb. 11, 2022

Abstract Microbial composition and functions in the rhizosphere—an important microbial hotspot—are among most fascinating yet elusive topics ecology. We used 557 pairs of published 16S rDNA amplicon sequences from bulk soils rhizosphere different ecosystems around world to generalize bacterial characteristics with respect community diversity, composition, functions. The selects microorganisms soil function as a seed bank, reducing diversity. is enriched Bacteroidetes, Proteobacteria, other copiotrophs. Highly modular but unstable networks (common for r -strategists) reflect interactions adaptations dynamic conditions. Dormancy strategies are dominated by toxin–antitoxin systems, while sporulation common soils. Functional predictions showed that genes involved organic compound conversion, nitrogen fixation, denitrification were strongly (11–182%), nitrification depleted.

Language: Английский

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Climate change effects on plant-soil feedbacks and consequences for biodiversity and functioning of terrestrial ecosystems

Science Advances, Journal Year: 2019, Volume and Issue: 5(11)

Published: Nov. 1, 2019

By affecting plant-soil feedbacks, climate change will alter plant distribution and performance overall ecosystem functioning.

Language: Английский

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Dramatic loss of inorganic carbon by nitrogen‐induced soil acidification in Chinese croplands

Global Change Biology, Journal Year: 2020, Volume and Issue: 26(6), P. 3738 - 3751

Published: April 2, 2020

Intensive crop production systems worldwide, particularly in China, rely heavily on nitrogen (N) fertilization, but left more than 50% of fertilizer N the environment. Nitrogen (over) fertilization and atmospheric deposition induce soil acidification, which is neutralized by inorganic carbon (SIC; carbonates), dioxide (CO2 ) released to atmosphere. For first time, loss SIC stocks response N-induced acidification was estimated for Chinese croplands from 1980 2020 forecasts were made up 2100. The 2.16 Pg C (16.3 Mg C/ha) upper 40 cm, 7% (0.15 C; 1.1 lost 2020. During these years, 7 million ha cropland has become carbonate free. Another 37% may be 2100 leaving 30 (37.8%) without carbonates if follows business-as-usual (BAU) scenario. Compared BAU scenario, reduction input 15%-30% after (scenarios S1 S2) will decrease dissolution 18%-41%. If remains constant as noted (S3) or decreases 1% annually (S4), a 52%-67% expected compared presence CaCO3 important various processes including acidity buffering, aggregate formation stabilization, organic matter microbial enzyme activities, nutrient cycling availability, water permeability plant productivity. Therefore, optimizing improving N-use efficiency are decreasing losses acidification. application should strictly calculated based demand, any overfertilization avoided prevent environmental problems fertility decline associated with losses.

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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Abundance-occupancy distributions to prioritize plant core microbiome membership

Current Opinion in Microbiology, Journal Year: 2019, Volume and Issue: 49, P. 50 - 58

Published: June 1, 2019

Core microbiome members are consistent features of a dataset that hypothesized to reflect underlying functional relationships with the host. A review recent plant-microbiome literature reveals variety study-specific approaches used define core, which presents challenge building general framework. Abundance-occupancy distributions, in macroecology describe changes community diversity over space, offer an ecological approach for prioritizing core membership both spatial and temporal studies. Additionally, neutral models fit abundance-occupancy distributions can provide insights into deterministically selected members. We examples code systematically explore plant from distributions. Though we focus on discussions relevant microbiome, method be widely generally applied prioritize any microbiome.

Language: Английский

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Biostimulants for Plant Growth and Mitigation of Abiotic Stresses: A Metabolomics Perspective

Metabolites, Journal Year: 2020, Volume and Issue: 10(12), P. 505 - 505

Published: Dec. 10, 2020

Adverse environmental conditions due to climate change, combined with declining soil fertility, threaten food security. Modern agriculture is facing a pressing situation where novel strategies must be developed for sustainable production and Biostimulants, conceptually defined as non-nutrient substances or microorganisms the ability promote plant growth health, represent potential provide economically favorable solutions that could introduce approaches improve agricultural practices crop productivity. Current knowledge phenotypic observations suggest biostimulants potentially function in regulating modifying physiological processes plants growth, alleviate stresses, quality yield. However, successfully develop biostimulant-based formulations programs, understanding biostimulant-plant interactions, at molecular, cellular levels, prerequisite. Metabolomics, multidisciplinary omics science, offers unique opportunities predictively decode mode of action on plants, identify signatory markers biostimulant action. Thus, this review intends highlight current scientific efforts gaps research industry, context promotion stress responses. The firstly revisits models have been elucidated describe molecular machinery employed by coping stresses. Furthermore, definitions, claims applications are pointed out, also indicating lack biological basis accurately postulate mechanisms biostimulants. articulates briefly key aspects metabolomics workflow (potential) science industry.

Language: Английский

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Comparing carbon and nitrogen stocks in paddy and upland soils: Accumulation, stabilization mechanisms, and environmental drivers

Geoderma, Journal Year: 2021, Volume and Issue: 398, P. 115121 - 115121

Published: April 16, 2021

Language: Английский

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Legume-based intercropping systems promote beneficial rhizobacterial community and crop yield under stressing conditions

Industrial Crops and Products, Journal Year: 2022, Volume and Issue: 183, P. 114958 - 114958

Published: April 26, 2022

Intercropping is an adapted farming system to optimize resource-use efficiency and crop yield, particularly in low input agricultural systems. Due the beneficial eco-agricultural effects of grain legumes, their integration mixed cropping systems such as intercropping can be more soil fertility, functioning, nutrient cycling. About 16–22% world's food provided by On smallholder farms Eastern Southern Africa, legumes has potential increase maize (Zea mays) production up 35% (e.g., Maize-pigeon pea (Cajanus cajan) intercropping). Legume-based also promote rhizobacterial community diversity health enhancing symbiotic non-symbiotic population. In rhizosphere, bacterial required improve growth both intercrops due several "direct indirect" mechanisms involving plant growth-promoting rhizobacteria (PGPR). This review aims highlight importance legume-based root-associated microorganisms particular emphasis on rhizobacteria; since whole "crop-crop-microorganism" agro-physiological performance. study discusses key role being fully synergistic with PGPR contributing yield stability under stressful conditions, notably drought deficiency. Thus, used agroecological practice ensure sustainability production.

Language: Английский

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Nutrients in the rhizosphere: A meta-analysis of content, availability, and influencing factors

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 826, P. 153908 - 153908

Published: Feb. 18, 2022

Language: Английский

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Modification of Rhizosphere Microbial Communities: A Possible Mechanism of Plant Growth Promoting Rhizobacteria Enhancing Plant Growth and Fitness

Frontiers in Plant Science, Journal Year: 2022, Volume and Issue: 13

Published: May 26, 2022

Plant beneficial bacteria, defined as plant growth-promoting rhizobacteria (PGPR), play a crucial role in plants’ growth, stress tolerance and disease prevention. In association with the rhizosphere of plants, PGPR facilitate growth development either directly or indirectly through multiple mechanisms, including increasing available mineral nutrients, moderating phytohormone levels acting biocontrol agents phytopathogens. It is generally accepted that effectiveness inoculants associated their ability to colonize, survive persist, well complex network interactions rhizosphere. Despite promising promotion results commonly reported mostly attributed phytohormones other organic compounds produced by inoculants, little information on potential mechanisms underlying such positive effects via modifying microbial community soil functionality. this review, we overviewed ecology function, hypothesizing may promote health composition functioning community, highlighting further directions for investigating from an ecological perspective.

Language: Английский

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