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Li JJ, Yang L, Miao CP, Teng YJ, Fu ZH, Cheng CL, Chang XX, Qian Y, Zhao LX. Impact of rhizosphere microorganisms on arsenic (As) transformation and accumulation in a traditional Chinese medical plant. Environ Sci Pollut Res Int 2021; 28:60923-60934. [PMID: 34165739 DOI: 10.1007/s11356-021-14500-6] [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: 08/03/2020] [Accepted: 05/17/2021] [Indexed: 06/13/2023]
Abstract
Panax notoginseng is an important traditional medicinal plant, but the commercial value is threatened by root-rot disease caused by rhizosphere microbes and a potential health risk caused by plant arsenic (As) accumulation. Whether rhizospheric microbes isolated from P. notoginseng rhizosphere soil could impact As uptake and transport into P. notoginseng is not yet known. Among the three root-rot disease-causing pathogens Fusarium flocciferum (PG 1), Fusarium oxysporum (PG 2), and Fusarium solani (PG 3) and one root-rot disease biocontrol fungus Trichoderma koningiopsis (FC 1) and five biocontrol-exerting bacterial species Bacillus siamensis (BC 1), Delftia acidovorans (BC 2), Brevibacillus formosus (BC 3), Mortierella alpine (BC 4), and Bacillus subtilis (BC 5), one As-resistant pathogen and four biocontrol microorganisms with As-resistant ability were identified. The As-transforming ability of the identified fungi and bacteria was ranked in the order of FC 1 > PG 1 and BC 2 > BC 3 > BC 1, respectively. Then, the As-resistant biocontrol and pathogenic microbes were initiated to colonize the rhizosphere of 1-year-old P. notoginseng seedlings growing in artificially As(V)-contaminated soil to evaluate the impact of microbe inoculation on P. notoginseng As uptake and transport capacity. Concentration of As in P. notoginseng tissues decreased in the order of the sequence stem > root > leaf. Compared to treatment without colonization by microorganism, inoculation with microorganisms increased As root uptake efficiency and root As concentration, especially under treatment of inoculation by BC 2 and PG 1 + BC 2. As transport efficiency from root to stem decreased by inoculation with microorganism, especially under treatment with inoculation of BC 2 and PG 1 + BC 2. However, the impact of microorganism colonization on As stem to leaf transport efficiency was not obvious. In summary, inoculation with rhizosphere microbes may increase As accumulation in P. notoginseng root, especially when using bacteria with high As transformation ability. Therefore, it is necessary to evaluate the As transformation capacity before applying biological control microorganism to the rhizosphere of P. notoginseng.
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Affiliation(s)
- Jiao-Jiao Li
- School of Ecology and Environmental Sciences, Yunnan University, No. 2 Cuihu North Road, Kunming, 650091, People's Republic of China
| | - Long Yang
- School of Ecology and Environmental Sciences, Yunnan University, No. 2 Cuihu North Road, Kunming, 650091, People's Republic of China
| | - Cui-Ping Miao
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University, No. 2 Cuihu North Road, Kunming, 650091, People's Republic of China
| | - Ya-Jun Teng
- Technology Center of Kunming Customs District P. R. China, Kunming, 650000, Yunnan, People's Republic of China
| | - Zi-Hao Fu
- School of Ecology and Environmental Sciences, Yunnan University, No. 2 Cuihu North Road, Kunming, 650091, People's Republic of China
| | - Chang-Lei Cheng
- Analysis and Measurements Center of Yunnan Provincial Non-ferrous Geology Bureau, Kunming, 650051, Yunnan, People's Republic of China
| | - Xue-Xiu Chang
- School of Ecology and Environmental Sciences, Yunnan University, No. 2 Cuihu North Road, Kunming, 650091, People's Republic of China
| | - Yu Qian
- School of Ecology and Environmental Sciences, Yunnan University, No. 2 Cuihu North Road, Kunming, 650091, People's Republic of China.
| | - Li-Xing Zhao
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University, No. 2 Cuihu North Road, Kunming, 650091, People's Republic of China.
- Yunnan Institute of Microbiology, Yunnan University, Kunming, 650091, People's Republic of China.
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Li X, Sun D, Feng H, Chen J, Chen Y, Li H, Cao Y, Ma LQ. Efficient arsenate reduction in As-hyperaccumulator Pteris vittata are mediated by novel arsenate reductases PvHAC1 and PvHAC2. J Hazard Mater 2020; 399:122895. [PMID: 32937698 DOI: 10.1016/j.jhazmat.2020.122895] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 03/10/2020] [Revised: 04/05/2020] [Accepted: 04/21/2020] [Indexed: 06/11/2023]
Abstract
Arsenic-hyperaccumulator Pteris vittata is efficient in As absorption, reduction, and translocation. But the molecular mechanisms and locations of arsenate (AsV) reduction in P. vittata are still unclear. Here, we identified two new arsenate reductase genes from P. vittata, PvHAC1 and PvHAC2. Two PvHAC genes encoded a rhodanase-like protein, which were localized in the cytoplasm and nucleus. Both recombinant Escherichia coli strains and transgenic Arabidopsis thaliana lines showed arsenate reductase ability after expressing PvHAC genes. Further, expressing PvHAC2 enhanced As tolerance and reduced As accumulation in A. thaliana shoots under AsV exposure. Based on expression pattern analysis, PvHAC1 and PvHAC2 were predominantly expressed in the rhizomes and fronds of P. vittata. Different from those of HAC homologous genes in non-hyperaccumulators, little PvHAC was expressed in the roots. Besides, PvHAC1 expression was strongly upregulated under AsV exposure but not AsIII. The data suggest that arsenate reductase PvHAC1 in the rhizomes coupled with arsenate reductase PvHAC2 in the fronds of P. vittata played a critical role in As-hyperaccumulation by P. vittata, which helps to further improve its utility in phytoremediation of As-contaminated soils.
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Affiliation(s)
- Xinyuan Li
- State Key Lab of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu 210023, China
| | - Dan Sun
- State Key Lab of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu 210023, China
| | - Huayuan Feng
- State Key Lab of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu 210023, China
| | - Junxiu Chen
- State Key Lab of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu 210023, China
| | - Yanshan Chen
- School of the Environment, Nanjing Normal University, Nanjing, Jiangsu 210023, China
| | - Hongbo Li
- State Key Lab of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu 210023, China
| | - Yue Cao
- State Key Lab of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu 210023, China; School of Environmental Science and Engineering, Guangdong Provincial Key Lab for Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, China.
| | - Lena Q Ma
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.
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Yin Y, Wan J, Li S, Li H, Dagot C, Wang Y. Transformation of roxarsone in the anoxic-oxic process when treating the livestock wastewater. Sci Total Environ 2018; 616-617:1235-1241. [PMID: 29074235 DOI: 10.1016/j.scitotenv.2017.10.194] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 08/01/2017] [Revised: 10/15/2017] [Accepted: 10/19/2017] [Indexed: 06/07/2023]
Abstract
In order to evaluate the influence of roxarsone (ROX) on the livestock wastewater treatment, a lab-scale pilot employing an anoxic-oxic (A-O) process was investigated by adding different concentrations of ROX at different periods. The mass balance of arsenic (As) in the A-O system was established through the analysis of As speciation and As migration in the gas, liquid and solid phases. The results showed that around 80% of total ROX (initial concentration was 50mgROXL-1) was eliminated in the anoxic reactor (R1) in which at least about 11% of total ROX was transformed to inorganic Asv (iAsv) due to the direct breaking of the C-As bond of ROX. Inorganic AsIII (iAsIII) and arsine (AsH3) were produced in R1, while the generated iAsIII in the effluent of R1 was almost completely oxidized to iAsV in the aerobic reactor (R2). However, the concentration of ROX in the effluent of R2 was almost the same as that in the effluent of R1. After 85days operation, iAsV and residual ROX as the main forms of As were observed after the A-O process. Furthermore, the mass balance of As at steady state revealed that around 0.08%, 3.91% and 96.01% of total As was transformed into gas (biogas), solid (excess sludge) and liquid (effluent). Additionally, the 16S rRNA analysis demonstrated that the existence of ROX in livestock wastewater may play a crucial role in the diversity of bacterial community in the A-O system.
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Affiliation(s)
- Yue Yin
- School of Chemical Engineering and Energy, Zhengzhou University, 100 Science Avenue, 450001, PR China
| | - Junfeng Wan
- School of Chemical Engineering and Energy, Zhengzhou University, 100 Science Avenue, 450001, PR China.
| | - Shaozhen Li
- School of Chemical Engineering and Energy, Zhengzhou University, 100 Science Avenue, 450001, PR China
| | - Hongli Li
- School of Chemical Engineering and Energy, Zhengzhou University, 100 Science Avenue, 450001, PR China
| | - Christophe Dagot
- GRESE EA 4330, Université de Limoges, 123 Avenue Albert Thomas, F-87060 Limoges Cedex, France; INSERM, U1092, Limoges, France
| | - Yan Wang
- School of Chemical Engineering and Energy, Zhengzhou University, 100 Science Avenue, 450001, PR China
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Román-Ponce B, Ramos-Garza J, Arroyo-Herrera I, Maldonado-Hernández J, Bahena-Osorio Y, Vásquez-Murrieta MS, Wang ET. Mechanism of arsenic resistance in endophytic bacteria isolated from endemic plant of mine tailings and their arsenophore production. Arch Microbiol 2018; 200:883-895. [PMID: 29476206 DOI: 10.1007/s00203-018-1495-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [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: 09/05/2017] [Revised: 01/25/2018] [Accepted: 02/15/2018] [Indexed: 10/18/2022]
Abstract
Arsenic contamination is an important environmental problem around the world since its high toxicity, and bacteria resist to this element serve as valuable resource for its bioremediation. Aiming at searching the arsenic-resistant bacteria and determining their resistant mechanism, a total of 27 strains isolated from roots of Prosopis laevigata and Spharealcea angustifolia grown in a heavy metal-contaminated region in Mexico were investigated. The minimum inhibitory concentration (MIC) and transformation abilities of arsenate (As5+) and arsenite (As3+), arsenophore synthesis, arsenate uptake, and cytoplasmatic arsenate reductase (arsC), and arsenite transporter (arsB) genes were studied for these strains. Based on these results and the 16S rDNA sequence analysis, these isolates were identified as arsenic-resistant endophytic bacteria (AREB) belonging to the genera Arthrobacter, Bacillus, Brevibacterium, Kocuria, Microbacterium, Micrococcus, Pseudomonas, and Staphylococcus. They could tolerate high concentrations of arsenic with MIC from 20 to > 100 mM for As5+ and 10-20 mM for As3+. Eleven isolates presented dual abilities of As5+ reduction and As3+ oxidation. As the most effective strains, Micrococcus luteus NE2E1 reduced 94% of the As5+ and Pseudomonas zhaodongensis NM2E7 oxidized 46% of As3+ under aerobic condition. About 70 and 44% of the test strains produced arsenophores to chelate As5+ and As3+, respectively. The AREB may absorb arsenate via the same receptor of phosphate uptake or via other way in some case. The cytoplasmic arsenate reductase and alternative arsenate reduction pathways exist in these AREB. Therefore, these AREB could be candidates for the bioremediation process.
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Affiliation(s)
- Brenda Román-Ponce
- Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas, Prolongación Carpio y Plan de Ayala s/n, Col. Santo Tomás, Del. Miguel Hidalgo, C.P. 11340, Mexico City, Mexico.,Departamento de Microbiología y Genética, Edificio Departamental, Lab. 214, Universidad de Salamanca, Campus Miguel de Unamuno, 37007, Salamanca, Spain
| | - Juan Ramos-Garza
- Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas, Prolongación Carpio y Plan de Ayala s/n, Col. Santo Tomás, Del. Miguel Hidalgo, C.P. 11340, Mexico City, Mexico.,Universidad del Valle de México, Campus Chapultepec, Laboratorio 305, Observatorio No. 400, Col. 16 de Septiembre, Del. Miguel Hidalgo, C.P. 11810, Mexico City, Mexico
| | - Ivan Arroyo-Herrera
- Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas, Prolongación Carpio y Plan de Ayala s/n, Col. Santo Tomás, Del. Miguel Hidalgo, C.P. 11340, Mexico City, Mexico
| | - Jessica Maldonado-Hernández
- Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas, Prolongación Carpio y Plan de Ayala s/n, Col. Santo Tomás, Del. Miguel Hidalgo, C.P. 11340, Mexico City, Mexico
| | - Yanelly Bahena-Osorio
- Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas, Prolongación Carpio y Plan de Ayala s/n, Col. Santo Tomás, Del. Miguel Hidalgo, C.P. 11340, Mexico City, Mexico
| | - María Soledad Vásquez-Murrieta
- Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas, Prolongación Carpio y Plan de Ayala s/n, Col. Santo Tomás, Del. Miguel Hidalgo, C.P. 11340, Mexico City, Mexico.
| | - En Tao Wang
- Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas, Prolongación Carpio y Plan de Ayala s/n, Col. Santo Tomás, Del. Miguel Hidalgo, C.P. 11340, Mexico City, Mexico.
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