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Sun Y, Guo J, Alejandro Jose Mur L, Xu X, Chen H, Yang Y, Yuan H. Nitrogen starvation modulates the sensitivity of rhizobacterial community to drought stress in Stevia rebaudiana. J Environ Manage 2024; 354:120486. [PMID: 38417363 DOI: 10.1016/j.jenvman.2024.120486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 02/06/2024] [Accepted: 02/20/2024] [Indexed: 03/01/2024]
Abstract
Alterations in water regimes or nitrogen (N) availability lead to shifts in the assemblage of rhizosphere microbial community; however, how the rhizosphere microbiome response to concurrent changes in water and N availability remains largely unclear. Herein, we investigated the taxonomic and functional characteristics of rhizobacteria associated with stevia (Stevia rebaudiana Bertoni) under varying combinations of water and N levels. Community diversity and predicted functions of rhizobacteria were predominantly altered by drought stress, with N-starvation modulating these effects. Moreover, N fertilization simplified the ecological interactions within rhizobacterial communities and heightened the relative role of stochastic processes on community assembly. In terms of rhizobacterial composition, we observed both common and distinctive changes in drought-responsive bacterial taxa under different N conditions. Generally, the relative abundance of Proteobacteria and Bacteroidetes phyla were depleted by drought stress but the Actinobacteria phylum showed increases. The rhizobacterial responses to drought stress were influenced by N availability, where the positive response of δ-proteobacteria and the negative response of α- and γ-proteobacteria, along with Bacteroidetes, were further heightened under N starvation. By contrast, under N fertilization conditions, an amplified negative or positive response to drought were demonstrated in Firmicutes and Actinobacteria phyla, respectively. Further, the drought-responsive rhizobacteria were mostly phylogenetically similar, but this pattern was modulated under N-rich conditions. Overall, our findings indicate an N-dependent specific restructuring of rhizosphere bacteria under drought stress. These changes in the rhizosphere microbiome could contribute to enhancing plant stress tolerance.
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Affiliation(s)
- Yuming Sun
- Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing, 210014, China
| | - Junjie Guo
- State Key Lab of Biocontrol, School of Agriculture, Shenzhen Campus of Sun Yat-sen University, Sun Yat-sen University, Shenzhen, Guangdong, 518107, China.
| | - Luis Alejandro Jose Mur
- Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, SY23 3DA, UK
| | - Xiaoyang Xu
- Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing, 210014, China
| | - Hao Chen
- State Key Lab of Biocontrol, School of Agriculture, Shenzhen Campus of Sun Yat-sen University, Sun Yat-sen University, Shenzhen, Guangdong, 518107, China
| | - Yongheng Yang
- Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing, 210014, China
| | - Haiyan Yuan
- Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing, 210014, China.
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Yi S, Li F, Wu C, Ge F, Feng C, Zhang M, Liu Y, Lu H. Co-transformation of HMs-PAHs in rhizosphere soils and adaptive responses of rhizobacteria during whole growth period of rice (Oryza sativa L.). J Environ Sci (China) 2023; 132:71-82. [PMID: 37336611 DOI: 10.1016/j.jes.2022.07.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 07/12/2022] [Accepted: 07/12/2022] [Indexed: 06/21/2023]
Abstract
This study investigated the transformations of heavy metals (HMs) and polycyclic aromatic hydrocarbons (PAHs) in rhizosphere soils and adaptive responses of rhizobacterial community under the real field conditions during four growth stages (e.g., greening, tillering, heading, and maturity) of early rice (Zhongjiazao 17) and late rice (Zhongyou 9918) in Jiangshe village (JSV) and Yangji village (YJV). Results showed that rhizosphere soils of YJV were mildly polluted by Cd and PAHs compared to that of JSV. The relative abundance of bioavailable Cd (bio-Cd) and bioavailable As (bio-As) in rhizosphere soil increased before the heading stage but decreased at the subsequent growth stage, but the content of ΣPAHs in rhizosphere soil decreased gradually during whole growth period. The dominant rhizobacteria genera at YJV (e.g., Bacillus, Massilia, Sphingomonas, and Geobacter) increased at an abundance level from the tillering to heading stage. Rhizobacteria interacted with the above co-pollutant more intensely at the tillering and heading stage, where genes involved in HM-resistance and PAH-degradation appeared to have a significant enhancement. The contents of bio-Cd and bio-As in rhizosphere soil of early rice were higher than that of late rice at each growth stage, especially at the heading stage. Bio-Cd, ΣPAHs, and organic matter were key factors influencing the community structure of rhizobacteria. Results of this study provide valuable insights about the interactions between HM-PAH co-pollutant and rhizobacterial community under real field conditions and thus develop in-situ rhizosphere remediation techniques for contaminated paddy fields.
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Affiliation(s)
- Shengwei Yi
- College of Environment Science and Resources, Xiangtan University, Xiangtan 411105, China; Hunan Engineering Laboratory for High-Efficiency Purification Technology and its Application in Complex Heavy Metal Wastewater Treatment, Xiangtan 411105, China; Scientific Research Innovation Platform of Environmental Behavior and Control Principle about New Pollutants in Hunan Provincial Universities, Xiangtan 411105, China
| | - Feng Li
- College of Environment Science and Resources, Xiangtan University, Xiangtan 411105, China; Hunan Engineering Laboratory for High-Efficiency Purification Technology and its Application in Complex Heavy Metal Wastewater Treatment, Xiangtan 411105, China; Scientific Research Innovation Platform of Environmental Behavior and Control Principle about New Pollutants in Hunan Provincial Universities, Xiangtan 411105, China.
| | - Chen Wu
- College of Environment Science and Resources, Xiangtan University, Xiangtan 411105, China; Hunan Engineering Laboratory for High-Efficiency Purification Technology and its Application in Complex Heavy Metal Wastewater Treatment, Xiangtan 411105, China; Scientific Research Innovation Platform of Environmental Behavior and Control Principle about New Pollutants in Hunan Provincial Universities, Xiangtan 411105, China
| | - Fei Ge
- College of Environment Science and Resources, Xiangtan University, Xiangtan 411105, China; Hunan Engineering Laboratory for High-Efficiency Purification Technology and its Application in Complex Heavy Metal Wastewater Treatment, Xiangtan 411105, China; Scientific Research Innovation Platform of Environmental Behavior and Control Principle about New Pollutants in Hunan Provincial Universities, Xiangtan 411105, China
| | - Chuang Feng
- College of Environment Science and Resources, Xiangtan University, Xiangtan 411105, China; Hunan Engineering Laboratory for High-Efficiency Purification Technology and its Application in Complex Heavy Metal Wastewater Treatment, Xiangtan 411105, China; Scientific Research Innovation Platform of Environmental Behavior and Control Principle about New Pollutants in Hunan Provincial Universities, Xiangtan 411105, China
| | - Ming Zhang
- Department of Environmental Engineering, China Jiliang University, Hangzhou 310018, China
| | - Yun Liu
- College of Environment Science and Resources, Xiangtan University, Xiangtan 411105, China; Hunan Engineering Laboratory for High-Efficiency Purification Technology and its Application in Complex Heavy Metal Wastewater Treatment, Xiangtan 411105, China; Scientific Research Innovation Platform of Environmental Behavior and Control Principle about New Pollutants in Hunan Provincial Universities, Xiangtan 411105, China
| | - Hainan Lu
- Shanghai Academy of Environmental Sciences, Shanghai 200233, China
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He T, Xu ZM, Wang JF, Zhang K, Wang FP, Li WL, Tian P, Li QS. Inoculation of Escherichia coli enriched the key functional bacteria that intensified cadmium accumulation by halophyte Suaeda salsa in saline soils. J Hazard Mater 2023; 458:131922. [PMID: 37379599 DOI: 10.1016/j.jhazmat.2023.131922] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 05/23/2023] [Accepted: 06/21/2023] [Indexed: 06/30/2023]
Abstract
The enhancement of cadmium (Cd) extraction by plants from contaminated soils associated with phosphate-solubilizing bacteria (PSB) has been widely reported, but the underlying mechanism remains scarcely, especially in Cd-contaminated saline soils. In this study, a green fluorescent protein-labeled PSB, the strain E. coli-10527, was observed to be abundantly colonized in the rhizosphere soils and roots of halophyte Suaeda salsa after inoculation in saline soil pot tests. Cd extraction by plants was significantly promoted. The enhanced Cd phytoextraction by E. coli-10527 was not solely dependent on bacterial efficient colonization, but more significantly, relied on the remodeling of rhizosphere microbiota, as confirmed by soil sterilization test. Taxonomic distribution and co-occurrence network analyses suggested that E. coli-10527 strengthened the interactive effects of keystone taxa in the rhizosphere soils, and enriched the key functional bacteria that involved in plant growth promotion and soil Cd mobilization. Seven enriched rhizospheric taxa (Phyllobacterium, Bacillus, Streptomyces mirabilis, Pseudomonas mirabilis, Rhodospirillale, Clostridium, and Agrobacterium) were obtained from 213 isolated strains, and were verified to produce phytohormone and promote soil Cd mobilization. E. coli-10527 and those enriched taxa could assemble as a simplified synthetic community to strengthen Cd phytoextraction through their synergistic interactions. Therefore, the specific microbiota in rhizosphere soils enriched by the inoculated PSB were also the key to intensifying Cd phytoextraction.
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Affiliation(s)
- Tao He
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 510632, China
| | - Zhi-Min Xu
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management Institute of Environmental and Soil Sciences, Institute of Ecoenvironmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - Jun-Feng Wang
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 510632, China
| | - Ke Zhang
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
| | - Fo-Peng Wang
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 510632, China
| | - Wan-Li Li
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Ping Tian
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 510632, China
| | - Qu-Sheng Li
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 510632, China.
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Li Q, Wang P, Zou C, Ge F, Li F, Liu Y, Zhang D, Tian J. Dynamics of dominant rhizospheric microbial communities responsible for trichlorfon absorption and translocation in maize seedlings. J Hazard Mater 2023; 451:131096. [PMID: 36893602 DOI: 10.1016/j.jhazmat.2023.131096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/24/2023] [Accepted: 02/25/2023] [Indexed: 06/18/2023]
Abstract
In this study, the available phosphorus (AP) and TCF concentrations in soils and maize (Zea mays) seedling tissues were measured in response to escalating TCF concentrations during 216 hr of culture. Maize seedlings growth considerably enhanced soil TCF degradation, reaching the highest of 73.2% and 87.4% at 216 hr in 50 and 200 mg/kg TCF treatments, respectively, and increased AP contents in all the seedling tissues. Soil TCF was majorly accumulated in seedling roots, reaching maximum concentration of 0.017 and 0.076 mg/kg in TCF-50 and TCF-200, respectively. The hydrophilicity of TCF might hinder its translocation to the aboveground shoot and leaf. Using bacterial 16 S rRNA gene sequencing, we found that TCF addition drastically lessened bacterial community interactions and hindered the complexity of their biotic networks in rhizosphere than in bulk soils, leading to the homogeneity of bacterial communities that were resistant or prone to TCF biodegradation. Mantel test and redundancy analysis suggested a significant enrichment of dominant species Massilia belonging to Proteobacteria phyla, which in turn affecting TCF translocation and accumulation in maize seedling tissues. This study provided new insight into the biogeochemical fate of TCF in maize seedling and the responsible rhizobacterial community in soil TCF absorption and translocation.
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Affiliation(s)
- Qiqiang Li
- Department of Environmental Science and Engineering, College of Environment and Resources, Xiangtan University, Xiangtan, China
| | - Peiying Wang
- Department of Environmental Science and Engineering, College of Environment and Resources, Xiangtan University, Xiangtan, China
| | - Caihua Zou
- Department of Environmental Science and Engineering, College of Environment and Resources, Xiangtan University, Xiangtan, China
| | - Fei Ge
- Department of Environmental Science and Engineering, College of Environment and Resources, Xiangtan University, Xiangtan, China
| | - Feng Li
- Department of Environmental Science and Engineering, College of Environment and Resources, Xiangtan University, Xiangtan, China
| | - Yun Liu
- Department of Environmental Science and Engineering, College of Environment and Resources, Xiangtan University, Xiangtan, China
| | - Dayi Zhang
- College of New Energy and Environment, Jilin University, Changchun 130021, China; Key Laboratory of Groundwater Resources and Environment Ministry of Education, Jilin University, Changchun 130021, China
| | - Jiang Tian
- Department of Environmental Science and Engineering, College of Environment and Resources, Xiangtan University, Xiangtan, China.
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Wu Z, Zheng Y, Sui X, Zhang Z, Wang E, Liu Y, Yu T, Yang J, Wu Y. Comparative analysis of the effects of conventional and biodegradable plastic mulching films on soil-peanut ecology and soil pollution. Chemosphere 2023; 334:139044. [PMID: 37244549 DOI: 10.1016/j.chemosphere.2023.139044] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 05/24/2023] [Accepted: 05/25/2023] [Indexed: 05/29/2023]
Abstract
In agricultural production, biodegradable plastic mulching film (Bio-PMF) has the potential to replace conventional plastic mulching film (CPMF) due to its degradability, but their impacts on soil-crop ecology are controversial. In this study, from 2019 to 2021, effects of CPMF and Bio-PMF on the soil-crop ecology and soil pollution were evaluated on a peanut farm. Compared to the Bio-PMF, an overall improvement in the soil-peanut ecology under the CPMF was observed, including an increase of 10.77 ± 4.8% in peanut yield, an amelioration of four soil physicochemical properties (total P and available P in the flowering stage, total P and temperature in the mature stage), an increase of rhizobacterial relative abundances in class level (Bacteroidia, Blastocatellia, Thermoleophilia and Vicinamibacteria in the flowering stage, Nitrospira and Bacilli in the mature stage) and genus level (RB41 and Bacillus in the flowering stage, Bacillus and Dongia in the mature stage), and an enhancement of soil nitrogen metabolism abilities (ureolysis, nitrification and aerobic ammonia in the flowering stage, nitrate reduction and nitrite ammonification in the mature stage). These preserved soil nutrients and temperature, reshaped rhizobacterial communities, and enhanced soil nitrogen metabolism abilities in the mature stage were obviously correlated with peanut yield under CPMF. However, such remarkable relations were not existed under Bio-PMF. In addition, compared with Bio-PMF, CPMF significantly increased the contents of dimethyl phthalate (DMP), diethyl phthalate (DEP), dibutyl phthalate (DBP) and microplastics (MPs) in soil by 79.93, 44.55, 138.72 and 14.1%, respectively. Thus, CPMF improved soil-peanut ecology and caused serious soil pollution, while Bio-PMF introduced little pollutants into the soil and had little impact on soil-peanut ecology. Based on these, the degradation ability of CPMF or the ecological improvement capacity of Bio-PMF should be improved to obtain the environmentally and soil-crop ecology friendly plastic film in the future.
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Affiliation(s)
- Zhengfeng Wu
- Shandong Peanut Research Institute, Qingdao, 266100, PR China
| | - Yongmei Zheng
- Shandong Peanut Research Institute, Qingdao, 266100, PR China
| | - Xinhua Sui
- Key Lab of Soil Microbiology, Ministry of Agriculture/College of Biological Sciences, China Agricultural University, Beijing, 100193, PR China
| | - Zhimeng Zhang
- Shandong Peanut Research Institute, Qingdao, 266100, PR China
| | - Entao Wang
- Escuela Nacional de Ciencias Biologicas, Instituto Politecnico Nacional, 11340, Mexico, D. F., Mexico
| | - Yuanhui Liu
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310006, PR China
| | - Tianyi Yu
- Shandong Peanut Research Institute, Qingdao, 266100, PR China
| | - Jishun Yang
- Shandong Peanut Research Institute, Qingdao, 266100, PR China
| | - Yue Wu
- Shandong Peanut Research Institute, Qingdao, 266100, PR China.
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Xu Q, Song X, Xu M, Xu Q, Liu Q, Tang C, Wang X, Yin W, Wang X. Elevated CO 2 and biochar differentially affect plant C:N:P stoichiometry and soil microbiota in the rhizosphere of white lupin (Lupinus albus L.). Chemosphere 2022; 308:136347. [PMID: 36087720 DOI: 10.1016/j.chemosphere.2022.136347] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/28/2022] [Accepted: 09/02/2022] [Indexed: 06/15/2023]
Abstract
Biochar application is a potent climate change mitigation strategy in agroecosystems. However, little is known about the interactive effects of elevated CO2 (eCO2) and biochar on plant nutrient uptake and soil microbial processes. A pot experiment was conducted to investigate the effects of eCO2 and biochar addition on plant C:N:P stoichiometry and rhizobacterial community for better management of nutrient balance and use efficiency in a future climate scenario. White lupin (Lupinus albus L.) was grown for 30 days in topsoil and subsoil with or without 2% corn-stubble biochar under ambient CO2 (aCO2: 390 ppm) or eCO2 (550 ppm). Elevated CO2 increased, but biochar decreased, plant biomass and shoot N and P uptake, with no interactions in either soil layer. Elevated CO2 decreased shoot N concentration by 16% and biochar decreased shoot P concentration by 11%. As a result, eCO2 increased shoot C:N ratio by 20% and decreased the N:P ratio by 11%. Biochar decreased shoot C:N ratio by 8% in the subsoil under eCO2. However, biochar increased shoot C:P ratio by an average of 13% and N:P ratio by 23% in the subsoil. Moreover, plants grown in the subsoil showed lower shoot N (35%) and P (70%) uptake compared to the topsoil. The results indicate that N and P are the more limiting factors that regulate plant growth under eCO2 and biochar application, respectively. Elevated CO2 and biochar oppositely affected dominant rhizobacterial community composition, with the eCO2 effect being greater. The microbiota in the subsoil held a greater diversity of contrasting species than the topsoil, which were associated with nutrient cycling, hydrocarbon degradation and plant productivity. These results enrich our understanding of potential soil nutrient cycling and plant nutrient balance in future agroecosystems.
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Affiliation(s)
- Qiao Xu
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu, 225127, PR China; Department of Animal, Plant and Soil Sciences, Centre for AgriBioscience, La Trobe University, Melbourne, VIC, 3086, Australia
| | - Xian Song
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu, 225127, PR China
| | - Meiling Xu
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu, 225127, PR China
| | - Qiuyue Xu
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu, 225127, PR China
| | - Qi Liu
- College of Forestry, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, Jiangsu, 210037, PR China
| | - Caixian Tang
- Department of Animal, Plant and Soil Sciences, Centre for AgriBioscience, La Trobe University, Melbourne, VIC, 3086, Australia
| | - Xiaoli Wang
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu, 225127, PR China
| | - Weiqin Yin
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu, 225127, PR China
| | - Xiaozhi Wang
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu, 225127, PR China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, 225127, PR China.
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He T, Xu ZJ, Wang JF, Wang FP, Zhou XF, Wang LL, Li QS. Improving cadmium accumulation by Solanum nigrum L. via regulating rhizobacterial community and metabolic function with phosphate-solubilizing bacteria colonization. Chemosphere 2022; 287:132209. [PMID: 34826911 DOI: 10.1016/j.chemosphere.2021.132209] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 09/06/2021] [Accepted: 09/07/2021] [Indexed: 05/03/2023]
Abstract
Soil cadmium (Cd) mobilized with phosphate-solubilizing bacteria (PSB), especially for strains effectively colonized in rhizosphere, is an important pathway for promoting its accumulation by Cd-hyperaccumulators. In this study, screened PSB strains, Acinetobacter pittii (AP) and Escherichia coli (EC), were used to evaluate their effects on Cd mobilization in rhizosphere, Cd accumulation by Solanum nigrum L., and rhizobacterial community and metabolic function under different colonization condition. Results indicated that AP or EC inoculated in soils significantly promoted plant growth, and simultaneously motivated Cd accumulation in S. nigrum L. by 119% and 88%, respectively, when compared with that of uninoculated treatment. Higher efficiency colonization of AP contributed to more organic acids (malic, l-proline, l-alanine, and γ-aminobutanoic) production in the rhizosphere soil and Cd accumulation by S. nigrum L., when compared with that of EC treatment. Taxonomic distribution and co-occurrence network analyses demonstrated that inoculation of AP or EC enriched dominant microbial taxa with plant growth promotion function and keystone taxa related to Cd mobilization in the rhizosphere soil, respectively. Inoculated strains up-regulated the expression of genes related to bacterial mobility, amino acid metabolism, and carbon metabolism among rhizobacterial community. Overall, this study provided a feasible method for soil Cd phytoremediation by promoting Cd mobilization with the enhancement of keystone taxa and organic acid secretion based on the high-efficiency colonization of PSB.
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Affiliation(s)
- Tao He
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 510632, China
| | - Zi-Jie Xu
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 510632, China
| | - Jun-Feng Wang
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 510632, China
| | - Fo-Peng Wang
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 510632, China
| | - Xue-Fang Zhou
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 510632, China
| | - Li-Li Wang
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 510632, China
| | - Qu-Sheng Li
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 510632, China.
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