Clay content modulates differences in bacterial community structure in soil aggregates of different size

Biesgen, Danh; Frindte, Katharina; Maarastawi, Sarah A.; Knief, Claudia

doi:10.1016/j.geoderma.2020.114544

Cited by 41 publications

(20 citation statements)

References 323 publications

(462 reference statements)

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“…Under these conditions, fresh precipitates free of significant surface coatings and prior to ripening will have increased surface reactivity. Further, (re)generation of mineral-bound and aqueous redox reactants will lead to new mineral reactive sites and niche differentiation, which allows a greater microbial diversity to co-exist through reduced competitive interactions 230,231 . The magnified insets show potential evolutionary consequences in microsites that form constant habitats.…”

Section: [H2] Redox and Rosmentioning

confidence: 99%

Dynamic interactions at the mineral–organic matter interface

Kleber

Bourg

Coward

et al. 2021

Nat Rev Earth Environ

381

369

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Minerals are widely assumed to protect organic matter (OM) from degradation in the environment, promoting the persistence of carbon in soil and sediments. In this Review, we describe the mechanisms and processes operating at the mineral-organic interface as they relate to OM transformation dynamics. A broad set of interactions occur, with minerals adsorbing organic compounds to their surfaces and/or acting as catalysts for organic reactions. Minerals can serve as redox partners for OM through direct electron transfer or by generating reactive oxygen species, which then oxidize OM. Finally, the compartmentalization of soil and sediment by minerals creates unique microsites that host diverse microbial communities. Acknowledgement of this multiplicity of interactions suggests the general assumption that the mineral matrix provides a protective function for organic matter is overly simplistic. Future work must recognize adsorption as a condition for further reactions instead of as a final destination for organic adsorbates, and should consider the spatial and functional complexity that is characteristic of the environments where mineral-OM interactions are observed.

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Section: [H2] Redox and Rosmentioning

confidence: 99%

Dynamic interactions at the mineral–organic matter interface

Kleber

Bourg

Coward

et al. 2021

Nat Rev Earth Environ

381

369

View full text Add to dashboard Cite

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“…Assessing which microbes are indicative of different soil niches and crops can assist in connecting the micron-scale functions of microorganisms to the broader ecological context ( Bach et al, 2018 ; Biesgen et al, 2020 ). After identifying unique membership, relationships between membership and ecosystem processes were explored.…”

Section: Discussionmentioning

confidence: 99%

Site and Bioenergy Cropping System Similarly Affect Distinct Live and Total Soil Microbial Communities

et al. 2021

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Bioenergy crops are a promising energy alternative to fossil fuels. During bioenergy feedstock production, crop inputs shape the composition of soil microbial communities, which in turn influences nutrient cycling and plant productivity. In addition to cropping inputs, site characteristics (e.g., soil texture, climate) influence bacterial and fungal communities. We explored the response of soil microorganisms to bioenergy cropping system (switchgrass vs. maize) and site (sandy loam vs. silty loam) within two long-term experimental research stations. The live and total microbial community membership was investigated using 16S and ITS amplicon sequencing of soil RNA and DNA. For both nucleic acid types, we expected fungi and prokaryotes to be differentially impacted by crop and site due their dissimilar life strategies. We also expected live communities to be more strongly affected by site and crop than the total communities due to a sensitivity to recent stimuli. Instead, we found that prokaryotic and fungal community composition was primarily driven by site with a secondary crop effect, highlighting the importance of soil texture and fertility in shaping both communities. Specific highly abundant prokaryotic and fungal taxa within live communities were indicative of site and cropping systems, providing insight into treatment-specific, agriculturally relevant microbial taxa that were obscured within total community profiles. Within live prokaryote communities, predatory Myxobacteria spp. were largely indicative of silty and switchgrass communities. Within live fungal communities, Glomeromycota spp. were solely indicative of switchgrass soils, while a few very abundant Mortierellomycota spp. were indicative of silty soils. Site and cropping system had distinct effects on the live and total communities reflecting selection forces of plant inputs and environmental conditions over time. Comparisons between RNA and DNA communities uncovered live members obscured within the total community as well as members of the relic DNA pool. The associations between live communities and relic DNA are a product of the intimate relationship between the ephemeral responses of the live community and the accumulation of DNA within necromass that contributes to soil organic matter, and in turn shapes soil microbial dynamics.

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“…The salinity of the PRS and RRS was found to be higher than PRN and RRN, which indicates the presence of the soluble salt which essentially increases the conductivity of the soil. Clay content for all the soil was found to be higher with respect to the coarse sand, ne sand and silt that in turn might also provide better condition for the microbial growth in the rhizospheric region 21 .…”

Section: Analysis Of the Relationship Between Environmental Factors And The Rhizospheric Microbial Communitymentioning

confidence: 92%

Different Soil Salinity Imparts Clear Alteration In Rhizospheric Bacterial Community Dynamics In Rice And Peanut.

Islam

Bhattacharya

Sarkar

et al. 2021

Preprint

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The rhizospheric microbiome is capable of changing the physio-chemical properties of its own micro-environment and found to be indispensable in overall health of the host-plant. The interplay between the rhizospheric environment and the microbiota residing therein tune the physiology of the associated plant. In this study, we have determined how the soil properties and the host-plant remains as an important parameter for microbial community-dynamics in the rhizosphere of rice and peanut. In addition to check the physio-chemical parameters of the rhizospheric soil, we have also prepared the metagenomic DNA from each rhizospheric soil followed by high-throughput sequencing and sequence-analysis to predict the OTUs that represents the community structure. The alpha-diversity of the bacterial community in the RRN sample was highest, while the lowest was in PRS sample. Actinobacteria is the most predominant phylum in PRN, PRS and RRN whereas Acidobacteria in RRS. We found a clear shift in bacterial community over the rice and peanut rhizosphere and also over these host-rhizospheres from normal and high saline region. The rhizospheric bacterial community composition found to be affected by the close-by environmental factors. Thus, the rhizospheric bacterial community-structure is related to both the adjoining soil characters and the type of the hosts.

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Clay content modulates differences in bacterial community structure in soil aggregates of different size

Cited by 41 publications

References 323 publications

Dynamic interactions at the mineral–organic matter interface

Dynamic interactions at the mineral–organic matter interface

Site and Bioenergy Cropping System Similarly Affect Distinct Live and Total Soil Microbial Communities

Different Soil Salinity Imparts Clear Alteration In Rhizospheric Bacterial Community Dynamics In Rice And Peanut.

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