Organo-mineral complexes alter bacterial composition and induce carbon and nitrogen cycling in the rhizosphere

Zheng, Xuehao; Oba, Belay Tafa; Wang, Han; Shen, Chenbo; Zhao, Rui; Zhao, Dan; Ding, Hui

doi:10.1016/j.scitotenv.2022.155671

Cited by 12 publications

(7 citation statements)

References 52 publications

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“…When β-NTI > 2 or β-NTI < −2, it indicates that the actual phylogenetic turnover between two communities is higher or lower than the expected phylogenetic turnover, i.e., the deterministic process dominates the structural changes; when −2 < β-NTI < 2, it indicates that the actual phylogenetic turnover between the two communities is similar to the expected phylogenetic turnover, i.e., the stochastic process dominates the structural changes (Anderson et al, 2011 ; Zheng et al, 2022 ). The difference between |β-NTI| and 0 represents the degree of clustering or dispersion of the system, that is, the impact of deterministic or stochastic processes on structural changes within a community.…”

Section: Methodsmentioning

confidence: 99%

Effect of the bacterial community assembly process on the microbial remediation of petroleum hydrocarbon-contaminated soil

et al. 2023

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IntroductionThe accumulation of petroleum hydrocarbons (PHs) in the soil can reduce soil porosity, hinder plant growth, and have a serious negative impact on soil ecology. Previously, we developed PH-degrading bacteria and discovered that the interaction between microorganisms may be more important in the degradation of PHs than the ability of exogenous-degrading bacteria. Nevertheless, the role of microbial ecological processes in the remediation process is frequently overlooked.MethodsThis study established six different surfactant-enhanced microbial remediation treatments on PH-contaminated soil using a pot experiment. After 30 days, the PHs removal rate was calculated; the bacterial community assembly process was also determined using the R language program, and the assembly process and the PHs removal rate were correlated.Results and discussionThe rhamnolipid-enhanced Bacillus methylotrophicus remediation achieved the highest PHs removal rate, and the bacterial community assembly process was impacted by deterministic factors, whereas the bacterial community assembly process in other treatments with low removal rates was affected by stochastic factors. When compared to the stochastic assembly process and the PHs removal rate, the deterministic assembly process and the PHs removal rate were found to have a significant positive correlation, indicating that the deterministic assembly process of bacterial communities may mediate the efficient removal of PHs. Therefore, this study recommends that when using microorganisms to remediate contaminated soil, care should be taken to avoid strong soil disturbance because directional regulation of bacterial ecological functions can also contribute to efficient removal of pollutants.

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Section: Methodsmentioning

confidence: 99%

Effect of the bacterial community assembly process on the microbial remediation of petroleum hydrocarbon-contaminated soil

et al. 2023

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“…The V3–V4 region of 16S was amplified using the prime pair of 338F-806R (5′- ACTCCTACGGGAGGCAGCAG-3′ and 5′- GGACTACHVGGGTWTCTAAT-3′) for bacteria, while the ITS region was amplified using the prime pair of ITS1F-ITS2R (5′-CTTGGTCATTTAGAGAGGAAGTAA-3′ and 5′-GCTGCGTTCTTCATCGATGC-3′) for fungi . The PCR amplification process was followed by 3 min of denaturation at 95 °C, followed by 27 cycles of denaturation at 95 °C for 30 s, annealing at 55 °C for 30 s, and extension at 72 °C for 30 s. A final extension step of 10 min was done at 72 °C . Each sample was replicated 8 times, and sequencing was performed at Majorbio BioPharm Technology Co. Sequence data were submitted to the NCBI Sequence Read Archive under Bioproject PRJNA992782 and BioSample accession SAMN36374248.…”

Section: Methodsmentioning

confidence: 99%

“…5 The PCR amplification process was followed by 3 min of denaturation at 95 °C, followed by 27 cycles of denaturation at 95 °C for 30 s, annealing at 55 °C for 30 s, and extension at 72 °C for 30 s. A final extension step of 10 min was done at 72 °C. 19 Each sample was replicated 8 times, and sequencing was performed at Majorbio BioPharm Technology Co. Sequence data were submitted to the NCBI Sequence Read Archive under Bioproject PRJNA992782 and BioSample accession SAMN36374248.…”

Section: Microbial Analysismentioning

confidence: 99%

“…A growing number of research reveal that fungi activity is probably more important for macroaggregate formation. , The metabolic process of fungi allows them easily to assemble copiotroph-dominated communities (R-strategy) and increase the abundance of macroaggregates, while the bacteria are more likely to be abundant in microaggregates (K-strategy) . Furthermore, according to aggregate hierarchy theory, the interaction between microbial extracellular metabolites and aggregate sizes affects aggregate stability . Compared to natural soils, bauxite residue has a high pH and exchange Na content, which limits aggregate formation and microbial activities.…”

Section: Introductionmentioning

confidence: 99%

“…18 Furthermore, according to aggregate hierarchy theory, the interaction between microbial extracellular metabolites and aggregate sizes affects aggregate stability. 19 Compared to natural soils, bauxite residue has a high pH and exchange Na content, which limits aggregate formation and microbial activities. Notably, the effects of microbial extracellular metabolites on the formation of aggregates in bauxite residue during the soil formation process are rarely reported.…”

Section: Introductionmentioning

confidence: 99%

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Stable Aggregate Formation and Microbial Diversity Resilience in Soil Formation of Bauxite Residue: Roles of Extracellular Polymeric Substances Secreted by Penicillium oxalicum

Jiang,

Chen,

Zhu

et al. 2023

ACS EST Eng.

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Microbially driven aggregate formation plays a sustainable role during the soil formation process in bauxite residue, which may realize the large-scale treatment of the typical alkaline solid waste. However, the potential mechanisms of microbial metabolites on the formation of organic–alkaline mineral complexes and stable aggregates are usually neglected. Here, we developed a novel microbially driven strategy to improve aggregate formation and enhance ecological service resilience by the inoculation of Penicillium oxalicum (P. oxalicum, an alkali-tolerant and acid-producing fungi). The intensive application of P. oxalicum reduced the contents of electrical conductivity (EC) and exchangeable sodium percentage (ESP) while increasing the proportions of macroaggregates and microaggregates in bauxite residue compared to the application of chemical amendments. Furthermore, even inoculated with the same dose of P. oxalicum, multiple inoculations achieved higher microbial extracellular metabolic activity by increasing the contents of metabolites than single inoculation. Simultaneously, P. oxalicum guided oligotrophic-dominated assemblages (including Actinobacteria, Proteobacteria, and Ascomycota members) and increased microbial network complexity. The spectroscopic analysis demonstrated that extracellular polymeric substances (EPSs) promoted the formation of organic–alkaline mineral complexes due to the high adsorptive functional groups (e.g., −OH, −COOH, N–H). The existence of hydrogen bonds led to high viscosity exhibition and stable organic–alkaline mineral complexes through the binding effects of polysaccharides to alkaline minerals (e.g., sodalite, cancrinite). The findings enhanced the understanding of the binding role of EPSs on aggregate stabilization and demonstrated the application potential of microbially driven aggregate formation during the soil formation process and ecological rehabilitation in bauxite residue.

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Chiral herbicide imazethapy influences plant-soil feedback on nitrogen metabolism by shaping rhizosphere microorganisms

Hou,

Zhu,

Chen

et al. 2024

Environ Sci Pollut Res

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Organo-mineral complexes alter bacterial composition and induce carbon and nitrogen cycling in the rhizosphere

Cited by 12 publications

References 52 publications

Effect of the bacterial community assembly process on the microbial remediation of petroleum hydrocarbon-contaminated soil

Effect of the bacterial community assembly process on the microbial remediation of petroleum hydrocarbon-contaminated soil

Stable Aggregate Formation and Microbial Diversity Resilience in Soil Formation of Bauxite Residue: Roles of Extracellular Polymeric Substances Secreted by Penicillium oxalicum

Chiral herbicide imazethapy influences plant-soil feedback on nitrogen metabolism by shaping rhizosphere microorganisms

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