Combined Phenanthrene and Copper Pollution Imposed a Selective Pressure on the Rice Root-Associated Microbiome

Li, Mingyue; Xu, Meiling; Su, Aoxue; Zhang, Ying; Niu, Lili; Xu, Yan

doi:10.3389/fmicb.2022.888086

Cited by 3 publications

(1 citation statement)

References 64 publications

(82 reference statements)

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“…Proteobacteria and Actinobacteria were the considerably highest abundant phylum in all treatments. These two phyla with the vast majority of heavy metal resistance genes have strong adaptability and are the dominant microbes in many soils under heavy metal stress ( Li S. et al, 2020 ; Yan et al, 2020 ; Li M. et al, 2022 ). Therefore, the increased abundance of Proteobacteria and Actinobacteria could be due to the resistant abilities of microorganisms to Pb.…”

Section: Discussionmentioning

confidence: 99%

Combined contribution of biochar and introduced AM fungi on lead stability and microbial community in polluted agricultural soil

Chen,

Tang,

et al. 2023

Front. Microbiol.

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IntroductionLead (Pb) pollution in agricultural soil has been accelerated by industrial development and human activities, and poses a major threat to agricultural ecosystems. Both biochar and arbuscular mycorrhiza (AM) fungi are considered to play an important role in remediation of Pb contaminated soil.MethodsThe combined remediation effects of introduced AM fungi and biochar on soil properties, Pb availability, microbial community and functional profiles were systematically investigated in unsterilized Pb-polluted agricultural soil.ResultsResults indicated that soil nutrients were significantly improved through the combined application of biochar and introduced AM fungi. The introduced AM fungi combined with biochar prepared at 400°C and 500°C promoted the transformation of Pb to a more stable state with low bioavailability. Moreover, the addition of AM fungi and biochar affected the relative abundances of dominant bacteria and fungi at the phylum and genus levels. Biochar mainly affected soil bacterial community and obviously increased the relative abundance of Actinobacteria and Blastococcus. The interactions between biochar and introduced AM fungi mainly affected fungal community, and increased the abundance of Ascomycota and Botryotrichum. Further, PICRUSt analysis indicated biochar amendment supported stronger bacterial metabolic functional potentials.DiscussionTherefore, the combined application of biochar and Therefore, the combined application of biochar and introduced AM fungi could improve soil nutrients, reduce Pb introduced AM fungi could improve soil nutrients, reduce Pb availability, availability, and show and show a positive effect on a positive effect on indigenous microbial communities and indigenous microbial communities and metabolic functions in metabolic functions in farmland soil.

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Section: Discussionmentioning

confidence: 99%

Combined contribution of biochar and introduced AM fungi on lead stability and microbial community in polluted agricultural soil

Chen,

Tang,

et al. 2023

Front. Microbiol.

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Sustained and efficient remediation of biochar immobilized with Sphingobium abikonense on phenanthrene-copper co-contaminated soil and microbial preferences of the bacteria colonized in biochar

Zhang

Liu

Niu

et al. 2023

Biochar

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Immobilized microbial technology has been widely used in wastewater treatment, but it has been used less frequently for soil remediation, particularly in sites that are co-contaminated with organic compounds and heavy metals. In addition, there is limited knowledge on the efficiency of remediation and microbial preferences to colonize the immobilized carriers. In this study, biochar immobilized with Sphingobium abikonense was introduced to remediate soils that were co-contaminated with phenanthrene (PHE) and copper (Cu), and the mechanisms of microbial assemblage were investigated. The immobilized microbial biochar maintained a degradation rate of more than 96% in both the first (0–6 d) and second (6–12 d) contamination periods. The addition of biochar increased the proportion of Cu bound to organic matter, and Fe–Mn oxide bound Cu in the soil. In addition, both Cu and PHE could be adsorbed into biochar pellets in the presence or absence of immobilized S. abikonense. The presence of biochar significantly increased the abundance of bacteria, such as Luteibacter, Bordetella and Dyella, that could degrade organic matter and tolerate heavy metals. Notably, the biochar could specifically select host microbes from the soil for colonization, while the presence of S. abikonense affected this preference. The autonomous selection facilitates the degradation of PHE and/or the immobilization of Cu in the soil. These results provide a green approach to efficiently and sustainably remediate soil co-contaminated with PHE and Cu and highlight the importance of microbial preference colonized in immobilized carriers. Graphical Abstract

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Effects of simulated acid rain on hydrochemical factors and microbial community structure in red soil aquifers

Wang,

Long,

Yin

et al. 2024

RSC Adv.

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Combined Phenanthrene and Copper Pollution Imposed a Selective Pressure on the Rice Root-Associated Microbiome

Cited by 3 publications

References 64 publications

Combined contribution of biochar and introduced AM fungi on lead stability and microbial community in polluted agricultural soil

Combined contribution of biochar and introduced AM fungi on lead stability and microbial community in polluted agricultural soil

Sustained and efficient remediation of biochar immobilized with Sphingobium abikonense on phenanthrene-copper co-contaminated soil and microbial preferences of the bacteria colonized in biochar

Effects of simulated acid rain on hydrochemical factors and microbial community structure in red soil aquifers

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