Assessment of bacterial communities in Cu-contaminated soil immobilized by a one-time application of micro-/nano-hydroxyapatite and phytoremediation for 3 years

Zhang, Wenhui; Sun, Run‐Cang; Xu, Lei; Liang, Jiaping; Zhou, Jing

doi:10.1016/j.chemosphere.2019.02.049

Cited by 27 publications

(7 citation statements)

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“…20,21 These amendments can also have significant impacts on the soil microbiome; for example, the addition of 1% (w/w) nHA and microsized HA significantly increased both bacterial abundance and diversity in Cu-contaminated soils, including plant growth promoting bacteria that can positively impact plant health. 22 Similar changes were noted in the fungal community in Cu contaminated soils upon exposure to 1% (w/ w) nHA. 23 A number of recent studies have begun to investigate the use of nHA as a novel phosphorus-based fertilizer.…”

Section: ■ Introductionsupporting

confidence: 52%

“…For example, soil application of 1500 mg/kg nHA decreased the bioavailable Cd concentration and subsequently reduced the Cd content in potato tubers by 17% as compared to the Cd alone treatment . Similarly, nHA stimulated root exudation of tartaric acid from ryegrass, which significantly decreased the rhizosphere pH and subsequently stabilized Pb in soil, effectively reducing metal accumulation in the plant. , These amendments can also have significant impacts on the soil microbiome; for example, the addition of 1% ( w / w ) nHA and microsized HA significantly increased both bacterial abundance and diversity in Cu-contaminated soils, including plant growth promoting bacteria that can positively impact plant health . Similar changes were noted in the fungal community in Cu contaminated soils upon exposure to 1% ( w / w ) nHA .…”

Section: Introductionmentioning

confidence: 99%

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Role of Nanoscale Hydroxyapatite in Disease Suppression of Fusarium-Infected Tomato

Jia

et al. 2021

Environ. Sci. Technol.

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The present study investigated the mechanisms by which large-and small-sized nanoscale hydroxyapatite (nHA) suppressed Fusarium-induced wilt disease in tomato. Both nHA sizes at 9.3 mg/L (low) and 46.5 mg/L (high dose) phosphorus (P) were foliar-sprayed on Fusarium-infected tomato leaf surfaces three times. Diseased shoot mass was increased by 40% upon exposure to the low dose of large-sized nHA compared to disease controls. Exposure to both nHA sizes significantly elevated phenylalanine ammonialyase activity and total phenolic content in Fusarium-infected shoots by 30−80% and 40−68%, respectively. Shoot salicylic acid content was also increased by 10−45%, suggesting the potential relationship between antioxidant and phytohormone pathways in nHA-promoted defense against fungal infection. Exposure to the high dose of both nHA sizes increased the root P content by 27−46%. A constrained analysis of principal coordinates suggests that high dose of both nHA sizes significantly altered the fatty acid profile in diseased tomato. Particularly, the diseased root C18:3 content was increased by 28−31% in the large-sized nHA treatments, indicating that nHA remodeled the cell membrane as part of defense against Fusarium infection. Taken together, our findings demonstrate the important role of nHA in promoting disease suppression for the sustainable use of nHA in nanoenabled agriculture.

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Section: ■ Introductionsupporting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Role of Nanoscale Hydroxyapatite in Disease Suppression of Fusarium-Infected Tomato

Jia

et al. 2021

Environ. Sci. Technol.

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“…The micro-nanometer HAP can increase the soil pH to reduce the availability of heavy metals 34 . This result is consistent with some reports 27,35,36 .…”

Section: Resultssupporting

confidence: 94%

The Immobilization of Soil Cadmium by the Combined Amendment of Bacteria and Hydroxyapatite

Zeng

et al. 2020

Sci Rep

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the remediation of heavy metal-contaminated soils has attracted increased attention worldwide. The immobilization of metals to prevent their uptake by plants is an efficient way to remediate contaminated soils. this work aimed to seek the immobilization of cadmium in contaminated soils via a combination method. Flask experiments were performed to investigate the effects of hydroxyapatite (HAp) and the Cupriavidus sp. strain ZSK on soil pH and DtpA-extractable cadmium. pot experiments were carried out to study the effects of the combined amendment on three plant species. The results showed that HAP has no obvious influence on the growth of the strain. With increasing concentrations of HAp, the soil pH increased, and the DtpA-extractable cd decreased. Via the combined amendment of the strain and HAP (SH), the DTPA-extractable Cd in the soil decreased by 58.2%. With the combined amendment of the SH, the cadmium accumulation in ramie, dandelion, and daisy decreased by 44.9%, 51.0%, and 38.7%, respectively. Moreover, the combined amendment somewhat benefitted the growth of the three plant species and significantly decreased the biosorption of cadmium. These results suggest that the immobilization by the SH combination is a potential method to decrease the available cadmium in the soil and the cadmium accumulation in plants. Soil is the main sink for metals and acts as a barrier to prevent their entry into the food chain 1. However, human activities such as mining and metal smelting have gradually transferred many toxic metals from the earth's crust to the environment, resulting in the spread and contamination of heavy metals 2-4. In recent decades, heavy metal pollution has become a serious problem worldwide. In China, it was reported that 13.33% of all soil samples collected from 6.3 million square kilometres of land were polluted with high levels of metals 5. Cadmium pollution has been detected in all agricultural areas. Cadmium is chemically stable and does not undergo chemical or microbial degradation. Moreover, cadmium is not an essential element for living organisms. Generally, it is regarded as the most toxic among heavy metals 6. Cadmium in the soil harms plant cells by altering metabolic pathways, damaging chloroplasts and mitochondria, and causing oxidative damage to lipids and proteins 7,8 , and cadmium also interferes with the uptake and transport of essential elements, e.g., P and K 9. Excessive Cd can reduce iron uptake by plants, affecting their photosynthesis 10. Cadmium can also accumulate in plants and animals and thus enters the human body through the food chain, threatening health 11,12. Thus, it is an enormous challenge to remediate heavy metal-contaminated soils worldwide. Various physical, chemical and biological techniques have been used to remediate heavy metal-contaminated soils 1. In situ immobilization is generally considered a feasible technique to remediate metal-contaminated soils due to its cost effectiveness and ease of operation 13. Many researchers have reported on the use of various...

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“…The changes in their relative abundances indicated that fermentation changed the fungal trophic mode; this was also reflected in the results of FUNGuild analysis. Previous studies have indicated that saprophytic fungi can promote the decomposition of organic matter (Chen et al, 2020 ; Zhang et al, 2019 ). Therefore, an increase in the content of saprophytic fungi would aid the degradation of the chemical components of tobacco leaves.…”

Section: Discussionmentioning

confidence: 99%

Microbial community and metabolic function analysis of cigar tobacco leaves during fermentation

Liu

Zhu

et al. 2021

MicrobiologyOpen

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Cigar tobacco leaves (CTLs) contain abundant bacteria and fungi that are vital to leaf quality during fermentation. In this study, artificial fermentation was used for the fermentation of CTLs since it was more controllable and efficient than natural aging. The bacterial and fungal community structure and composition in unfermented and fermented CTLs were determined to understand the effects of microbes on the characteristics of CTLs during artificial fermentation. The relationship between the chemical contents and alterations in the microbial composition was evaluated, and the functions of bacteria and fungi in fermented CTLs were predicted to determine the possible metabolic pathways. After artificial fermentation, the bacterial and fungal community structure significantly changed in CTLs. The total nitrate and nicotine contents were most readily affected by the bacterial and fungal communities, respectively. FAPROTAX software predictions of the bacterial community revealed increases in functions related to compound transformation after fermentation. FUNGuild predictions of the fungal community revealed an increase in the content of saprotrophic fungi after fermentation. These data provide information regarding the artificial fermentation mechanism of CTLs and will inform safety and quality improvements.

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Assessment of bacterial communities in Cu-contaminated soil immobilized by a one-time application of micro-/nano-hydroxyapatite and phytoremediation for 3 years

Cited by 27 publications

References 58 publications

Role of Nanoscale Hydroxyapatite in Disease Suppression of Fusarium-Infected Tomato

Role of Nanoscale Hydroxyapatite in Disease Suppression of Fusarium-Infected Tomato

The Immobilization of Soil Cadmium by the Combined Amendment of Bacteria and Hydroxyapatite

Microbial community and metabolic function analysis of cigar tobacco leaves during fermentation

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