Occurrence, fate, and transport of potentially toxic metals (PTMs) in an alkaline rhizosphere soil-plant (Maize, Zea mays L.) system: the role of Bacillus subtilis

Li, Xiaoping; Cai, Yue; Liu, Dongying; Ai, Yuwei; Zhang, Meng; Gao, Yanhua; Zhang, Yuchao; Xu, Zhang; Yan, Xiangyang; Liu, Bin; Yu, Hongtao; Mielke, Howard W.

doi:10.1007/s11356-018-4031-6

Cited by 7 publications

(4 citation statements)

References 67 publications

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“…The biochemical impact of subsurface soil microorganisms on metal content in the above-ground plant growth provides evidence of processes that diminish topsoil metals. An investigation of the impact of Bacillus subtilis on fractionation, translocation, and accumulation in the subsurface rhizosphere soil of maize ( Zea mays L.) found that B. subtilis tended to immobilize Pb, Sb, Ni, Zn, and Cu in the rhizosphere soil, thereby preventing the transport of these metals to plants above the soil surface (95). The low Pb organic matter transported by plants to the soil surface would attenuate the amount of Pb accumulating in topsoil.…”

Section: Discussionmentioning

confidence: 99%

The concurrent decline of soil lead and children’s blood lead in New Orleans

Mielke

Gonzales

Powell³

et al. 2019

Proc. Natl. Acad. Sci. U.S.A.

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109

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Lead (Pb) is extremely toxic and a major cause of chronic diseases worldwide. Pb is associated with health disparities, particularly within low-income populations. In biological systems, Pb mimics calcium and, among other effects, interrupts cell signaling. Furthermore, Pb exposure results in epigenetic changes that affect multigenerational gene expression. Exposure to Pb has decreased through primary prevention, including removal of Pb solder from canned food, regulating lead-based paint, and especially eliminating Pb additives in gasoline. While researchers observe a continuous decline in children’s blood lead (BPb), reservoirs of exposure persist in topsoil, which stores the legacy dust from leaded gasoline and other sources. Our surveys of metropolitan New Orleans reveal that median topsoil Pb in communities (n = 274) decreased 44% from 99 mg/kg to 54 mg/kg (P value of 2.09 × 10−08), with a median depletion rate of ∼2.4 mg⋅kg⋅y−1 over 15 y. From 2000 through 2005 to 2011 through 2016, children’s BPb declined from 3.6 μg/dL to 1.2 μg/dL or 64% (P value of 2.02 × 10−85), a decrease of ∼0.2 μg⋅dL⋅y−1 during a median of 12 y. Here, we explore the decline of children’s BPb by examining a metabolism of cities framework of inputs, transformations, storages, and outputs. Our findings indicate that decreasing Pb in topsoil is an important factor in the continuous decline of children’s BPb. Similar reductions are expected in other major US cities. The most contaminated urban communities, usually inhabited by vulnerable populations, require further reductions of topsoil Pb to fulfill primary prevention for the nation’s children.

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Section: Discussionmentioning

confidence: 99%

The concurrent decline of soil lead and children’s blood lead in New Orleans

Mielke

Gonzales

Powell³

et al. 2019

Proc. Natl. Acad. Sci. U.S.A.

Self Cite

109

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“…1 ). This is mainly because compound Bacillus biofertilizer is rich in a large number of microbes, which can reduce the available Cd concentration in the soil through the combination with microbial cell walls [ 38 ].…”

Section: Discussionmentioning

confidence: 99%

Application of cotton straw biochar and compound Bacillus biofertilizer decrease the bioavailability of soil cd through impacting soil bacteria

Zhu

Song

et al. 2022

BMC Microbiol

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Background Cd seriously threatens soil environment, remedying Cd in farmland and clearing the response of soil environment to modifiers in Cd-contaminated soils is necessary. In this study, the effects of cotton straw biochar and compound Bacillus biofertilizer used as modifiers on the biochemical properties, enzyme activity, and microbial diversity in Cd-contaminated soils (1, 2, and 4 mg·kg−1) were investigated. Results The results showed that both cotton straw biochar and compound Bacillus biofertilizer could improve the soil chemical characteristics, including the increase of soil C/N ratio, electrical conductance (EC) and pH, and the most important decrease of soil available Cd content by 60.24% and 74.34%, respectively (P < 0.05). On the other hand, adding cotton straw biochar and compound Bacillus biofertilizer in Cd stressed soil also improved soil biological characteristics. Among them, cotton straw biochar mainly through increasing soil alkaline phosphatase activity and improve bacteria abundance, compound Bacillus biofertilizer by increasing soil invertase, alkaline phosphatase, catalase, and urease activity increased bacterial community diversity. On the whole, the decrease of soil available Cd was mainly caused by the increase of soil pH, C/N, urease and alkaline phosphatase activities, and the relative abundance of Acidobacteria and Proteobacteria. Conclusions In summary, the applications of cotton straw biochar and compound Bacillus biofertilizer could decrease soil available Cd concentration, increase soil bacterial community diversity and functions metabolism, and reduce the damage of Cd stress, compared with cotton straw biochar, compound Bacillus biofertilizer was more effective in immobilizing Cd and improving soil environmental quality.

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“…Organic carbon had a significant correlation with pH (Tu et al, 2018;Xiao et al, 2018). A high level of sulfur in the soil increases its pH (Li et al, 2019). According to Kopáček, et al [14], nitrogen cycling is intimately linked to sulfur and carbon cycling.…”

Section: Introductionmentioning

confidence: 97%

“…The richness, diversity, and structure of microbial communities can be affected by environmental parameters and edaphic properties, mainly pH and nutrients. Researchers have reported the relationship of pH with other soil parameters [11][12][13]. Organic carbon had a significant correlation with pH (Tu et al, 2018;Xiao et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

16S Amplicon Sequencing of Nitrifying Bacteria and Archaea Inhabiting Maize Rhizosphere and the Influencing Environmental Factors

Ayiti

Babalola

2022

Agriculture

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Nitrifying bacteria and archaea are ubiquitous and can transform ammonia locked up in soil or manure into nitrate, a more soluble form of nitrogen. However, nitrifying bacteria and archaea inhabiting maize rhizosphere have not been fully explored. This study evaluates the diversity and abundance of nitrifying bacteria and archaea across different growth stages of maize using 16S amplicon sequencing. Moreover, the influence of environmental factors (soil physical and chemical properties) on the nitrifying communities was evaluated. Rhizosphere soil DNA was extracted using Nucleospin Soil DNA extraction kit and sequenced on Illumina Miseq platform. MG-RAST was used to analyze the raw sequences. The physical and chemical properties of the soil were measured using standard procedure. The results revealed 9 genera of nitrifying bacteria; Nitrospira, Nitrosospira, Nitrobacter, Nitrosovibrio, Nitrosomonas, Nitrosococcus, Nitrococcus, unclassified (derived from Nitrosomonadales), unclassified (derived from Nitrosomonadaceae) and 1 archaeon Candidatus Nitrososphaera. The Nitrospirae phyla group, which had the most nitrifying bacteria, was more abundant at the tasselling stage (67.94%). Alpha diversity showed no significant difference. However, the Beta diversity showed significant difference (p = 0.01, R = 0.58) across the growth stages. The growth stages had no significant effect on the diversity of nitrifying bacteria and archaea, but the tasselling stage had the most abundant nitrifying bacteria. A correlation was observed between some of the chemical properties and some nitrifying bacteria. The research outcome can be put into consideration while carrying out a biotechnological process that involves nitrifying bacteria and archaea.

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Occurrence, fate, and transport of potentially toxic metals (PTMs) in an alkaline rhizosphere soil-plant (Maize, Zea mays L.) system: the role of Bacillus subtilis

Cited by 7 publications

References 67 publications

The concurrent decline of soil lead and children’s blood lead in New Orleans

The concurrent decline of soil lead and children’s blood lead in New Orleans

Application of cotton straw biochar and compound Bacillus biofertilizer decrease the bioavailability of soil cd through impacting soil bacteria

16S Amplicon Sequencing of Nitrifying Bacteria and Archaea Inhabiting Maize Rhizosphere and the Influencing Environmental Factors

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