Recent Understanding of Soil Acidobacteria and Their Ecological Significance: A Critical Review

Frontiers in Microbiology, Journal Year: 2020, Volume and Issue: 11

Published: Oct. 30, 2020

Acidobacteria represents an underrepresented soil bacterial phylum whose members are pervasive and copiously distributed across nearly all ecosystems. Acidobacterial sequences abundant in soils represent a significant fraction of microbial community. Being recalcitrant difficult-to-cultivate under laboratory conditions, holistic, polyphasic approaches required to study these refractive bacteria extensively. possesses inventory genes involved diverse metabolic pathways, as evidenced by their pan-genomic profiles. Because preponderance ubiquity the soil, speculations have been made regarding dynamic roles vital ecological processes viz., regulation biogeochemical cycles, decomposition biopolymers, exopolysaccharide secretion, plant growth promotion. These expected that might help survival competitive colonization rhizosphere, leading establishment beneficial relationships with plants. Exploration genetic attributes more in-depth insights into belowground mechanics dynamics would lead better understanding functions significance this enigmatic soil-plant environment. This review is effort provide recent update diversity useful for characterization, roles, future biotechnological perspectives.

Language: Английский

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Plant health: feedback effect of root exudates-rhizobiome interactions

Applied Microbiology and Biotechnology, Journal Year: 2018, Volume and Issue: 103(3), P. 1155 - 1166

Published: Dec. 20, 2018

The well-being of the microbial community that densely populates rhizosphere is aided by a plant's root exudates. Maintaining health key factor in its continued existence. As minute as rhizospheric microbes are, their importance plant growth cannot be overemphasized. They depend on plants for nutrients and other necessary requirements. relationship between rhizosphere-microbiome (rhizobiome) hosts can beneficial, non-effectual, or pathogenic depending involved. This relationship, to large extent, determines fate host survival. Modern molecular techniques have been used unravel rhizobiome species' composition, but interplay exudates factors maintenance healthy not yet thoroughly investigated. Many functional proteins are activated upon contact with external factors. These may elicit promoting suppressing responses from plants. To optimize productivity plants, diversity modulatory need clearly understood improved health.

Language: Английский

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Temperature and pH define the realised niche space of arbuscular mycorrhizal fungi

New Phytologist, Journal Year: 2021, Volume and Issue: 231(2), P. 763 - 776

Published: Jan. 29, 2021

Summary The arbuscular mycorrhizal (AM) fungi are a globally distributed group of soil organisms that play critical roles in ecosystem function. However, the ecological niches individual AM fungal taxa poorly understood. We collected > 300 samples from natural ecosystems worldwide and modelled realised virtual (VT; approximately species‐level phylogroups). found environmental spatial variables jointly explained VT distribution worldwide, with temperature pH being most important abiotic drivers, effects generally occurring at local to regional scales. While dispersal limitation could explain some variation distribution, relative abundance was almost exclusively driven by variables. Several on were correlated phylogeny, indicating closely related exhibit similar niche optima widths. Major clades within Glomeraceae exhibited distinct optima, Acaulosporaceae had low conditions, Gigasporaceae high precipitation conditions. Identification space occupied phylogenetic groups microbial provides basis for building detailed hypotheses about how communities respond gradients manipulation worldwide.

Language: Английский

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Harnessing root exudates for plant microbiome engineering and stress resistance in plants

Microbiological Research, Journal Year: 2023, Volume and Issue: 279, P. 127564 - 127564

Published: Dec. 1, 2023

Language: Английский

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Interplay of biotic and abiotic factors shapes tree seedling growth and root-associated microbial communities

Communications Biology, Journal Year: 2024, Volume and Issue: 7(1)

Published: March 22, 2024

Abstract Root-associated microbes can alleviate plant abiotic stresses, thus potentially supporting adaptation to a changing climate or novel environments during range expansion. While change is extending species fundamental niches northward, the distribution and colonization of mutualists (e.g., arbuscular mycorrhizal fungi) pathogens may constrain growth regeneration. Yet, degree which biotic factors impact performance associated microbial communities at edge their remains unclear. Here, we use root microscopy, coupled with amplicon sequencing, study bacterial, fungal, root-associated from sugar maple seedlings distributed across two temperate-to-boreal elevational gradients in southern Québec, Canada. Our findings demonstrate that soil pH, Ca, distance trees are key drivers communities, overshadowing influence elevation. Interestingly, changes fungal community composition mediate an indirect effect pH on seedling growth, pattern consistent both sites. Overall, our highlight complex role shaping tree-microbe interactions, turn correlated growth. These have important ramifications for tree expansion response shifting climatic niches.

Language: Английский

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Forest Soil Microbiomes: A Review of Key Research from 2003 to 2023

Forests, Journal Year: 2025, Volume and Issue: 16(1), P. 148 - 148

Published: Jan. 15, 2025

Forests have a key role in mitigating both non-biological and biological ecological disturbances. However, major disturbances (soil pollution, shift from native forest species to exoticones, forested watersheds climate changes) can different impacts on forest’s soil microbiome. Because the microbial community of forests has variety ecosystem services that promote health, this review tries answer following questions: (i) Which are main drive responses microbiome? (ii) How we measure these changes? For aim, summarizes details tree vegetation type, communities ecosystems, mutual influence between plants, soil, microbiomes. Microbial shaped by factors such as type composition, plant types, nutrient levels fertility, disturbance patterns, symbiotic associations, biotic interactions, progression succession. Anthropogenic activities produce rapid response communities, leading short- long-term alterations. Harvesting processes reduce drastically microbiome diversity, forcing specialized more generalist microorganisms. Restoration scenarios indicate re-establishment level similar forest, but with high percentage replaced This emphasizes is range environmental, ecological, factors. The primary drivers ecosystems discussed include composition availability, structure, interactions within disturbances, succession, temporal dynamics. When considered together, interact complex ways, influencing function, resilience ecosystems.

Language: Английский

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Decoupled diversity patterns in bacteria and fungi across continental forest ecosystems

Soil Biology and Biochemistry, Journal Year: 2020, Volume and Issue: 144, P. 107763 - 107763

Published: March 2, 2020

Language: Английский

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Microbial succession on decomposing root litter in a drought-prone Scots pine forest

The ISME Journal, Journal Year: 2019, Volume and Issue: 13(9), P. 2346 - 2362

Published: May 23, 2019

Decomposition is a major flux of the carbon cycle in forest soils and understanding involved processes key for budgeting turnover. constrained by presence biological agents such as microorganisms underlying environmental conditions water availability. A metabarcoding approach ribosomal markers was chosen to study succession bacterial fungal decomposers on root litter. Litterbags containing pine roots were buried two years sequentially sampled. associated communities surveyed under ambient dry long-term irrigation conditions. Early decomposition stages characterized fast-cycling Bacteroidetes Helotiales, which then replaced more specialized bacteria litter-associated or parasitic groups Acidobacteria, white rots, Pleosporales. This likely driven decrease easily degradable carbohydrates relative increase persistent compounds lignin. We hypothesize that functional redundancy among resident microbial taxa caused similar rates control irrigated soils. These findings have important implications drought-prone Alpine forests frequent drought events reduce litter fall, but not decomposition, potentially resulting lower stocks.

Language: Английский

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Does conversion from natural forest to plantation affect fungal and bacterial biodiversity, community structure, and co-occurrence networks in the organic horizon and mineral soil?

Forest Ecology and Management, Journal Year: 2019, Volume and Issue: 446, P. 238 - 250

Published: May 22, 2019

Language: Английский

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Tree Species Shape Soil Bacterial Community Structure and Function in Temperate Deciduous Forests

Frontiers in Microbiology, Journal Year: 2019, Volume and Issue: 10

Published: July 9, 2019

Amplicon-based analysis of 16S rRNA genes and transcripts was used to assess the effect tree species composition on soil bacterial community structure function in a temperate deciduous forest. Samples were collected from mono mixed stands Fagus sylvatica (beech), Carpinus betulus (hornbeam), Tilia sp. (lime), Quercus (oak) spring, summer, autumn. Soil exhibited similar taxonomic at total (DNA-based) potentially active (RNA-based) level, with fewer taxa present level. Members Rhizobiales dominated both followed by members Acidobacteriales, Solibacterales, Rhodospirillales, Xanthomonadales. Bacterial communities level showed significant positive correlation identity (mono stands) lesser extent richness (mixed stands). Approximately 58 64% indicator operational units (OTUs) association only one stand respectively, indicating strong impact composition. C/N ratio, pH, P content similarly communities, which attributed direct indirect effects forest stands. Seasonality strongest driver predicted metabolic functions related C fixation degradation, N metabolism. Carbon nitrogen processes significantly abundant while degradation gene abundances increased summer autumn, corresponding litterfall decomposition. The results revealed that spatially homogenous soil, diversity are dominant drivers communities.

Language: Английский

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