Response of rice and bacterial community to phosphorus-containing materials in soil-plant ecosystem of rare earth mining area

Jin, Shulan; Jin, Wanqin; Bai, Yijun; Dong, Chengxu; Jin, Decai; Hu, Zhonghan; Huang, Yongji

doi:10.1016/j.jhazmat.2019.121004

Cited by 19 publications

(26 citation statements)

References 46 publications

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“…Rare earth elements (REEs) have been widely used as microfertilizers in agriculture [1][2][3][4] because they can improve plant growth and stress resistance at certain concentrations. Lanthanum (La) is a rare earth element that has been extensively studied due to its wide application in numerous fields and potential accumulation in the environment [5][6][7]. Previous studies have demonstrated that La induces hormesis in many plant physiological processes, such as seedling growth, peroxidase activity, net photosynthesis and chlorophyll production, which have a dose response characterized by stimulation at low concentrations and inhibition at high concentrations [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Lanthanum and abscisic acid coregulate chlorophyll production of seedling in switchgrass

Pei

Sun

2020

PLoS ONE

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The rare earth element lanthanum (La) has been proven to be beneficial for plant growth with a low concentration, and abscisic acid (ABA) which is a plant hormone also can regulate plant growth. In the present study, we investigated the germination and seedling growth of switchgrass (Panicum virgatum L.) under La (10 μM), ABA (10 μM) and La + ABA treatments. The results showed that La, ABA and La + ABA treatments could not significantly affect the germination and shoot length as compared to the control (P>0.05). However, La treatment increased the root activity and chlorophyll content, and ABA treatment enhanced root length and root activity (P<0.05). La + ABA treatments demonstrated that La could not significantly alleviate the promotion of ABA in root length, while ABA reversed the increase of chlorophyll content caused by La. The coregulation of La and ABA on chlorophyll content was further explored by in vitro experiments and quantum chemical calculations. In vitro experiments revealed that La, ABA, and La + ABA treatments reduced the absorbance of chlorophyll, and quantum chemical calculations indicated that the reduction of absorbance was caused by the reactions between La, ABA and chlorophyll. In vivo and in vitro experiments, together with quantum chemical calculations, demonstrated that both ABA and La could stimulate the production of chlorophyll, while they also could react with chlorophyll to produce La-monochlorophyll, La-bischlorophyll, and ABA adsorbed chlorophyll, which had lower absorbance. La + ABA treatment significantly decreased the chlorophyll content in vivo. This phenomenon was due to the fact that La and ABA formed LaABA compound, which markedly reduced the concentrations of ABA and La, and the effect of promoting chlorophyll production was overcome by the effect of reducing chlorophyll absorbance.

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Section: Introductionmentioning

confidence: 99%

Lanthanum and abscisic acid coregulate chlorophyll production of seedling in switchgrass

Pei

Sun

2020

PLoS ONE

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“…In detail, the comparison across sites highlighted a higher contribution of Latescibacterota, AKAU4049 and BD2-11 at site S1, while of Ignavibacteria and Calditrichia at S2, of Bdellovibrionia at S3, and of Desulfobulbia at S4 (Supplementary Figure S2). Members of all these classes are abundant in environments rich in HMs and/or hydrocarbons, suggesting their quantitative and possibly functional relevance in marine sediments that display high concentrations of such contaminants (Lanoil et al, 2001;Iino et al, 2010;Youssef et al, 2015;Cerqueira et al, 2017;Bergo et al, 2020;Jin et al, 2020;Costa et al, 2021). In particular, the differences in the relative contribution of these taxa across the sites of the Bagnoli Coroglio Bay suggest that the specific contaminants present at each benthic site might contribute to determine a local increase of bacterial taxa, which are elsewhere rare.…”

Section: Resultsmentioning

confidence: 99%

Highly Contaminated Marine Sediments Can Host Rare Bacterial Taxa Potentially Useful for Bioremediation

et al. 2021

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Coastal areas impacted by high anthropogenic pressures typically display sediment contamination by polycyclic aromatic hydrocarbons (PAHs) and heavy metals (HMs). Microbial-based bioremediation represents a promising strategy for sediment reclamation, yet it frequently fails due to poor knowledge of the diversity and dynamics of the autochthonous microbial assemblages and to the inhibition of the target microbes in the contaminated matrix. In the present study, we used an integrated approach including a detailed environmental characterization, high-throughput sequencing and culturing to identify autochthonous bacteria with bioremediation potential in the sediments of Bagnoli-Coroglio (Gulf of Naples, Mediterranean Sea), a coastal area highly contaminated by PAHs, aliphatic hydrocarbons and HMs. The analysis of the benthic prokaryotic diversity showed that the distribution of the dominant taxon (Gammaproteobacteria) was mainly influenced by PAHs, As, and Cd concentrations. The other abundant taxa (including Alphaproteobacteria, Deltaproteobacteria, Bacteroidetes, Acidobacteria, Actinobacteria, NB1-j, Desulfobacterota, and Myxococcota) were mainly driven by sediment grain size and by Cu and Cr concentrations, while the rare taxa (i.e., each contributing <1%) by As and aliphatic hydrocarbons concentrations and by sediment redox potential. These results suggest a differential response of bacterial taxa to environmental features and chemical contamination and those different bacterial groups may be inhibited or promoted by different contaminants. This hypothesis was confirmed by culturing and isolating 80 bacterial strains using media highly enriched in PAHs, only nine of which were contextually resistant to high HM concentrations. Such resistant isolates represented novel Gammaproteobacteria strains affiliated to Vibrio, Pseudoalteromonas, and Agarivorans, which were only scarcely represented in their original assemblages. These findings suggest that rare but culturable bacterial strains resistant/tolerant to high levels of mixed contaminants can be promising candidates useful for the reclamation by bioaugmentation strategies of marine sediments that are highly contaminated with PAHs and HMs.

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“…Due to extraction of ionic rare earth by (NH4)2SO4 leaching, ammonia N in mining area seriously exceeded the standard, pH value decreased, which caused dry weight of root, shoot, grain of cultivated rice in mining area to have significant negative correlation with nitrate nitrogen, and negative correlation with total nitrogen, ammonia nitrogen, and significant positive correlation with pH. A large number of studies have shown that there is a significant positive correlation between the REE content in crops and that in soil [2][3][4][5] . In this study, the content of rare earth elements in soil is H > M > L, and the content of rare earth elements in rice root, shoot and grain is H > M > L, which is basically consistent with the previous research results.…”

Section: Discussionmentioning

confidence: 99%

“…However, the dominant species of soil bacteria was Firmicutes (phylum), which was related to Proteus, Actinomycetes, Bacteroidetes and Acidobacteria. Firmicutes (phylum) are affected by rare earth elements 42,3,5 . In this study, the abundance of Firmicum (phylum) in rice rhizosphere of H and M at tillering stage was significantly higher than that of L, and the abundance of Firmicum (phylum) in rice rhizosphere of H was significantly higher than that of M and L; The abundance of L was significantly higher than that of H and M; The abundance of Firmicutes in rice rhizosphere of L was significantly lower than that of H and M. It can be seen that Firmicutes (phylum) in soil-plant system are sensitive to rare earth elements, but the mechanism is very complex.…”

Section: Discussionmentioning

confidence: 99%

“…Microorganism is the most sensitive indicator of farmland ecological environment. The microorganism is affected by climate factors, soil physical and chemical properties, plant species/genotypes, and also affected by heavy metal pollution [5][6] With the extensive use of rare earth resources in many industries, the world's demand for rare earth resources increased from 136,000 t in 2017 to 151,000 t in 2020 7 . The increasing demand promotes the development and processing of rare earth.…”

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confidence: 99%

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Effects of Rare Earth Elements on Bacteria in Rhizosphere, Root, Phyllosphere and Leaf of Soil-Rice Ecosystem

Xin-zhuan

Pan

et al. 2021

Preprint

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The effects of rare earth mining on rice biomass, rare earth element(REE) content and bacterial community structure was studied by pot experiment. The research showed that the REE content in rice roots, shoots and grains was significantly positive correlated with that in soil, and the dry weight of rice roots, shoots and grains was highly correlated with soil physical and chemical properties, nutrient elements and REE contents; The exploitation of rare earth minerals inhibited a-diversity of endophytic fungi in rhizosphere, root, phyllosphere and leaf of rice, significantly reduced the abundance index, OTU number, Chao, Ace index and also significantly reduced the diversity index-Shannon index and Inv-Simpson index, also reduced uniformity index: Pielou’s evenness index, Simpson’s evenness index, etc, which caused β-diversity of bacteria to be quite different. The exploitation of rare earth minerals reduces the diversity of bacteria, but forms dominant bacteria, such as Burkholderia, Bacillus, Buttiauxella, Acinetobacter, Bradyrhizobium, Candida koribacter, which can degrade the pollutants formed by exploitation of rare earth minerals, alleviate the compound pollution of rare earth and ammonia nitrogen, and also has the function of fixing nitrogen and resisting rare earth stress; The content of soil available phosphorus in non mining area is low, forming the dominant bacteria of Pantoea, which has the function of improving soil phosphorus availability. Rare earth elements and physical and chemical properties of soil affect the community structure of bacteria in rhizosphere and phyllosphere of rice, promote the parallel movement of some bacteria in rhizosphere, root, phyllosphere and leaf of rice, promote the construction of community structure of bacteria in rhizosphere and phyllosphere of rice, give full play to the growth promoting function of Endophytes, and promote the growth of rice. The results showed that the rice biomass in mining area was guaranteed due to the growth promoting effect of endophytic bacteria, However, the mining of mineral resources causes the compound pollution of rare earth and ammonia nitrogen, which makes REE content of rice in mining area significantly higher than that in non mining area.

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Response of rice and bacterial community to phosphorus-containing materials in soil-plant ecosystem of rare earth mining area

Cited by 19 publications

References 46 publications

Lanthanum and abscisic acid coregulate chlorophyll production of seedling in switchgrass

Lanthanum and abscisic acid coregulate chlorophyll production of seedling in switchgrass

Highly Contaminated Marine Sediments Can Host Rare Bacterial Taxa Potentially Useful for Bioremediation

Effects of Rare Earth Elements on Bacteria in Rhizosphere, Root, Phyllosphere and Leaf of Soil-Rice Ecosystem

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