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Morris S, Quispe-Arpasi D, Lens PNL. Effect of Rhodococcus opacus PD630 on selenium phytoremediation by Brassica oleracea. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2024; 26:1280-1290. [PMID: 38348969 DOI: 10.1080/15226514.2024.2311725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/09/2024]
Abstract
The purpose of this study was to evaluate the potential of microbial-enhanced Brassica oleracea for the phytoremediation of seleniferous soils. The effect of selenite (Se(IV)) and selenate (Se(VI)) on B. oleracea (1-100 mg.L-1) was examined through germination (7 d) and pot (30 d) trials. Microbial analysis was conducted to verify the toxic effect of various Se concentrations (1-500 mg.L-1) on Rhodococcus opacus PD360, and to determine if it exhibits plant growth promoter traits. R. opacus PD630 was found to tolerate high concentrations of both Se(IV) and Se(VI), above 100 mg.L-1. R. opacus PD630 reduced Se(IV) and Se(VI) over 7 days, with a Se conversion efficiency between 60 and 80%. Germination results indicated lower concentrations (0-10 mg.L-1) of Se(IV) and Se(VI) gave a higher shoot length (> 4 cm). B. oleracea accumulated 600-1,000 mg.kg-1 dry weight (DW) of Se(IV) and Se(VI), making it a secondary accumulator of Se. Moreover, seeds inoculated with R. opacus PD360 showed increased Se uptake (up to 1,200 mg Se.kg-1 DW). In addition, bioconcentration and translocation factors were greater than one. The results indicate a synergistic effect between R. opacus PD630 and B. oleracea for Se phytoextraction from polluted soils.
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Affiliation(s)
- Sinead Morris
- University of Galway, University Road, H91 TK33, Galway, Ireland
| | - Diana Quispe-Arpasi
- University of Galway, University Road, H91 TK33, Galway, Ireland
- Department of Microbiology, Universidad Tecnológica del Perú, Campus Ate, Carretera Central km 11.6, Ate, Lima, Peru
| | - Piet N L Lens
- University of Galway, University Road, H91 TK33, Galway, Ireland
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2
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Wang F, Zhang J, Xu L, Ma A, Zhuang G, Huo S, Zou B, Qian J, Cui Y. Selenium volatilization in plants, microalgae, and microorganisms. Heliyon 2024; 10:e26023. [PMID: 38390045 PMCID: PMC10881343 DOI: 10.1016/j.heliyon.2024.e26023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 01/12/2024] [Accepted: 02/06/2024] [Indexed: 02/24/2024] Open
Abstract
The augmented prevalence of Se (Se) pollution can be attributed to various human activities, such as mining, coal combustion, oil extraction and refining, and agricultural irrigation. Although Se is vital for animals, humans, and microorganisms, excessive concentrations of this element can give rise to potential hazards. Consequently, numerous approaches have been devised to mitigate Se pollution, encompassing physicochemical techniques and bioremediation. The recognition of Se volatilization as a potential strategy for mitigating Se pollution in contaminated environments is underscored in this review. This study delves into the volatilization mechanisms in various organisms, including plants, microalgae, and microorganisms. By assessing the efficacy of Se removal and identifying the rate-limiting steps associated with volatilization, this paper provides insightful recommendations for Se mitigation. Constructed wetlands are a cost-effective and environmentally friendly alternative in the treatment of Se volatilization. The fate, behavior, bioavailability, and toxicity of Se within complex environmental systems are comprehensively reviewed. This knowledge forms the basis for developing management plans that aimed at mitigating Se contamination in wetlands and protecting the associated ecosystems.
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Affiliation(s)
- Feng Wang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, 212013, China
- Institute of Agricultural Products Processing Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Jie Zhang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Ling Xu
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, 212013, China
- Institute of Agricultural Products Processing Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Anzhou Ma
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Guoqiang Zhuang
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Shuhao Huo
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Bin Zou
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Jingya Qian
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Yi Cui
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, 212013, China
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Li T, Wang X, Wang X, Huang J, Shen L. Mechanisms Driving the Distribution and Activity of Mineralization and Nitrification in the Reservoir Riparian Zone. MICROBIAL ECOLOGY 2023; 86:1829-1846. [PMID: 36702929 DOI: 10.1007/s00248-023-02180-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 01/19/2023] [Indexed: 06/18/2023]
Abstract
The riparian zone ecosystems have greater energy flow and elemental cycling than adjacent terrestrial and aquatic ecosystems. Mineralization and nitrification are important initiating processes in the nitrogen cycle, but their distribution and activity under different environmental conditions in the riparian zone and the driving mechanisms are still not clear. We investigated the effects of environmental and microbial factors on mineralization and nitrification activities by analyzing the community of alkaline (apr) and neutral (npr) metallopeptidase, ammonia-oxidizing archaea (AOA), and bacteria (AOB) in soils and sediments under different land-use types in the riparian zone of Miyun Reservoir, as well as measuring potential nitrogen mineralization and ammonia oxidation rates (AOR). The results showed that the mineralization and nitrification activities of soils were greater than those of sediments. AOA and AOB dominate the ammonia oxidation activity of soil and sediment, respectively. NH4+ content was a key factor influencing the ecological niche differentiation between AOA and AOB. The high carbon and nitrogen content of the woodland significantly increased mineralization and nitrification activity. Microbial communities were significantly clustered in the woodland. The land-use type, not the flooding condition, determined the distribution of microbial community structure. The diversity of npr was significantly correlated with potential N mineralization rates, while the transcript abundance of AOA was significantly correlated with ammonia oxidation rates. Our study suggests that environmental changes regulate the distribution and activity of mineralization and nitrification processes in the reservoir riparian zone by affecting the transcript abundance, diversity and community structure of the microbial functional genes.
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Affiliation(s)
- Tingting Li
- College of Resources, Environment and Tourism, Capital Normal University, No. 105, North West Third Ring Road, Haidian District, Beijing, 100048, China
| | - Xiaoyan Wang
- College of Resources, Environment and Tourism, Capital Normal University, No. 105, North West Third Ring Road, Haidian District, Beijing, 100048, China.
| | - Xia Wang
- College of Resources, Environment and Tourism, Capital Normal University, No. 105, North West Third Ring Road, Haidian District, Beijing, 100048, China
| | - Jingyu Huang
- College of Resources, Environment and Tourism, Capital Normal University, No. 105, North West Third Ring Road, Haidian District, Beijing, 100048, China
| | - Lei Shen
- College of Resources, Environment and Tourism, Capital Normal University, No. 105, North West Third Ring Road, Haidian District, Beijing, 100048, China
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Povedano-Priego C, Jroundi F, Solari PL, Guerra-Tschuschke I, Abad-Ortega MDM, Link A, Vilchez-Vargas R, Merroun ML. Unlocking the bentonite microbial diversity and its implications in selenium bioreduction and biotransformation: Advances in deep geological repositories. JOURNAL OF HAZARDOUS MATERIALS 2023; 445:130557. [PMID: 36502723 DOI: 10.1016/j.jhazmat.2022.130557] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 11/28/2022] [Accepted: 12/03/2022] [Indexed: 06/17/2023]
Abstract
Selenium, 79Se, is one of the most critical radionuclides in radioactive waste disposed in future deep geological repositories (DGRs). Here, we investigate the impact of bentonite microbial communities on the allotropic transformation of Se(IV) bioreduction products under DGR relevant conditions. In addition, Se amendment-dependent shifts in the bentonite microbial populations are assessed. Microcosms of water-saturated bentonites were spiked with a bacterial consortium, treated with selenite and incubated anaerobically for six months. A combination of X-Ray Absorption Spectroscopy, Electron Microscopy, and Raman Spectroscopy was used to track the allotropic changes of the Se bioreduction products. Interestingly, the color of bentonite shifted from orange to black in the selenite-treated microcosms. In the orange layers, amorphous or monoclinic Se(0) were identified, whilst black precipitates consisted of stable trigonal Se(0) form. Illumina DNA sequencing indicated the distribution of strains with Se(IV) reducing and Se(0) allotropic biotransformation potential, like Pseudomonas, Stenotrophomonas, Desulfosporosinus, and unclassified-Desulfuromonadaceae. The archaea Methanosarcina decreased its abundance in the presence of Se(IV), probably caused by this oxyanion toxicity. These findings provide an understanding of the bentonite microbial strategies involved in the immobilization of Se(IV) by reduction processes, and prove their implication in the allotropic biotransformation from amorphous to trigonal Se(0) under DGR relevant conditions.
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Affiliation(s)
| | - Fadwa Jroundi
- Department of Microbiology, Faculty of Sciences, University of Granada, Granada, Spain.
| | - Pier L Solari
- MARS Beamline, Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, Gif-sur-Yvette Cedex, France.
| | | | | | - Alexander Link
- Department of Gastroenterology, Hepatology and Infectious Diseases, University of Magdeburg, Magdeburg, Germany.
| | - Ramiro Vilchez-Vargas
- Department of Gastroenterology, Hepatology and Infectious Diseases, University of Magdeburg, Magdeburg, Germany.
| | - Mohamed L Merroun
- Department of Microbiology, Faculty of Sciences, University of Granada, Granada, Spain.
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Zhang L, Bai J, Zhang K, Wei Z, Wang Y, Liu H, Xiao R, Jorquera MA. Characterizing bacterial communities in Phragmites australis rhizosphere and non-rhizosphere sediments under pressure of antibiotics in a shallow lake. Front Microbiol 2022; 13:1092854. [PMID: 36560949 PMCID: PMC9763296 DOI: 10.3389/fmicb.2022.1092854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 11/22/2022] [Indexed: 12/12/2022] Open
Abstract
Introduction Antibiotics are ubiquitous pollutants and widely found in aquatic ecosystems, which of rhizosphere sediment and rhizosphere bacterial communities had certain correlation. However, the response of bacterial communities in Phragmites australis rhizosphere and non-rhizosphere sediments to antibiotics stress is still poorly understood. Methods To address this knowledge gap, the samples of rhizosphere (R) and non-rhizosphere (NR) sediments of P. australis were collected to investigate the differences of bacterial communities under the influence of antibiotics and key bacterial species and dominate environmental factors in Baiyangdian (BYD) Lake. Results The results showed that the contents of norfloxacin (NOR), ciprofloxacin (CIP) and total antibiotics in rhizosphere sediments were significantly higher than that in non-rhizosphere sediments, meanwhile, bacterial communities in non-rhizosphere sediments had significantly higher diversity (Sobs, Shannon, Simpsoneven and PD) than those in rhizosphere sediments. Furthermore, total antibiotics and CIP were found to be the most important factors in bacterial diversity. The majority of the phyla in rhizosphere sediments were Firmicutes, Proteobacteria and Campilobacterota, while Proteobacteria, Chloroflexi was the most abundant phyla followed by Bacteroidota, Actinobacteriota in non-rhizosphere sediments. The dominate factors of shaping the bacterial communities in rhizosphere were total antibiotics, pH, sediment organic matter (SOM), and NH4-N, while dissolved organic carbon (DOC), NO3-N, pH, and water contents (WC) in non-rhizosphere sediments. Discussion It is suggested that antibiotics may have a substantial effect on bacterial communities in P. australis rhizosphere sediment, which showed potential risk for ARGs selection pressure and dissemination in shallow lake ecosystems.
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Affiliation(s)
- Ling Zhang
- School of Environment, Beijing Normal University, Beijing, China,School of Chemistry and Chemical Engineering, Qinghai Normal University, Xining, China
| | - Junhong Bai
- School of Environment, Beijing Normal University, Beijing, China,*Correspondence: Junhong Bai,
| | - Kegang Zhang
- Department of Environmental Engineering and Science, North China Electric Power University, Baoding, China
| | - Zhuoqun Wei
- School of Environment, Beijing Normal University, Beijing, China
| | - Yaqi Wang
- School of Environment, Beijing Normal University, Beijing, China
| | - Haizhu Liu
- School of Environment, Beijing Normal University, Beijing, China
| | - Rong Xiao
- College of Environment and Safety Engineering, FuZhou University, Fuzhou, China
| | - Milko A. Jorquera
- Laboratorio de Ecología Microbiana Aplicada (EMALAB), Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Temuco, Chile
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Chao W, Rao S, Chen Q, Zhang W, Liao Y, Ye J, Cheng S, Yang X, Xu F. Advances in Research on the Involvement of Selenium in Regulating Plant Ecosystems. PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11202712. [PMID: 36297736 PMCID: PMC9607533 DOI: 10.3390/plants11202712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 09/26/2022] [Accepted: 10/11/2022] [Indexed: 05/15/2023]
Abstract
Selenium is an essential trace element which plays an important role in human immune regulation and disease prevention. Plants absorb inorganic selenium (selenite or selenate) from the soil and convert it into various organic selenides (such as seleno amino acids, selenoproteins, and volatile selenides) via the sulfur metabolic pathway. These organic selenides are important sources of dietary selenium supplementation for humans. Organoselenides can promote plant growth, improve nutritional quality, and play an important regulatory function in plant ecosystems. The release of selenium-containing compounds into the soil by Se hyperaccumulators can promote the growth of Se accumulators but inhibit the growth and distribution of non-Se accumulators. Volatile selenides with specific odors have a deterrent effect on herbivores, reducing their feeding on plants. Soil microorganisms can effectively promote the uptake and transformation of selenium in plants, and organic selenides in plants can improve the tolerance of plants to pathogenic bacteria. Although selenium is not an essential trace element for plants, the right amount of selenium has important physiological and ecological benefits for them. This review summarizes recent research related to the functions of selenium in plant ecosystems to provide a deeper understanding of the significance of this element in plant physiology and ecosystems and to serve as a theoretical basis and technical support for the full exploitation and rational application of the ecological functions of selenium-accumulating plants.
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Affiliation(s)
- Wei Chao
- College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, China
- Engineering Research Center of Ecology and Agricultural Use of Wetland of Ministry of Education, Yangtze University, Jingzhou 434025, China
- Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Yangtze University, Jingzhou 434025, China
| | - Shen Rao
- National R&D Center for Se-Rich Agricultural Products Processing, School of Modern Industry for Selenium Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Qiangwen Chen
- College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, China
| | - Weiwei Zhang
- College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, China
| | - Yongling Liao
- College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, China
| | - Jiabao Ye
- College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, China
| | - Shuiyuan Cheng
- National R&D Center for Se-Rich Agricultural Products Processing, School of Modern Industry for Selenium Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Xiaoyan Yang
- Henry Fok School of Biology and Agricultural, Shaoguan University, Shaoguan 512005, China
- Correspondence: (X.Y.); or (F.X.)
| | - Feng Xu
- College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, China
- Correspondence: (X.Y.); or (F.X.)
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Li M, He H, Mi T, Zhen Y. Spatiotemporal dynamics of ammonia-oxidizing archaea and bacteria contributing to nitrification in sediments from Bohai Sea and South Yellow Sea, China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 825:153972. [PMID: 35189237 DOI: 10.1016/j.scitotenv.2022.153972] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 02/12/2022] [Accepted: 02/14/2022] [Indexed: 06/14/2023]
Abstract
Nitrification is a central process in nitrogen cycle in the ocean. Ammonia-oxidizing archaea (AOA) and bacteria (AOB) play significant roles in ammonia oxidation which is the first and rate-limiting step in nitrification, and their differential contribution to nitrification is an important issue, attracting extensive attention. In this study, based on the quantification of archaeal and bacterial amoA gene and the measurement of potential nitrification rate (PNR), we investigated the spatiotemporal dynamics of PNRs and the amoA gene abundance and transcript abundance of aerobic ammonia oxidizers in surface sediments collected in summer and spring across ~900 km of the Bohai Sea and Yellow Sea in China. The results revealed that the contribution of AOA to nitrification was greater than that of AOB in coastal sediments, probably due to salinity and ammonia concentration. Besides, seasons had significant effect on amoA gene abundance and transcript abundance, especially for AOA, while both seasons and sea areas had significant influence on PNR of AOA and AOB. Further analysis showed complex relationships among amoA gene abundances, transcript abundances and PNRs. More importantly, both spatial (geographic distance) and environmental factors were vital in explaining the variations of ammonia-oxidizing microorganism abundances and the PNRs.
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Affiliation(s)
- Mingyue Li
- School of Resources and Environmental Engineering, Shandong University of Technology, Zibo 255049, China; Laboratory for Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China,; Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China
| | - Hui He
- College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China
| | - Tiezhu Mi
- Laboratory for Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China,; Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China,; College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Yu Zhen
- Laboratory for Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China,; Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China,; College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China.
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8
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Lin Y, Zhang Y, Liang X, Duan R, Yang L, Du Y, Wu L, Huang J, Xiang G, Bai J, Zhen Y. Assessment of rhizosphere bacterial diversity and composition in a metal hyperaccumulator (
Boehmeria nivea
) and a non‐accumulator (
Artemisia annua
) in an antimony mine. J Appl Microbiol 2022; 132:3432-3443. [DOI: 10.1111/jam.15486] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 01/12/2022] [Accepted: 02/08/2022] [Indexed: 12/01/2022]
Affiliation(s)
- Yuxiang Lin
- College of Agriculture and Biotechnology Loudi Hunan China
| | - Yaqi Zhang
- College of Agriculture and Biotechnology Loudi Hunan China
| | - Xin Liang
- College of Agriculture and Biotechnology Loudi Hunan China
| | - Renyan Duan
- College of Agriculture and Biotechnology Loudi Hunan China
| | - Li Yang
- College of Agriculture and Biotechnology Loudi Hunan China
| | - Yihuan Du
- College of Agriculture and Biotechnology Loudi Hunan China
| | - Lianfu Wu
- Key Laboratory of Biodiversity Research and Ecological Conservation in Southwest Anhui Province Anqing Normal University Anqing Anhui China
| | - Jiacheng Huang
- College of Agriculture and Biotechnology Loudi Hunan China
| | - Guohong Xiang
- College of Agriculture and Biotechnology Loudi Hunan China
| | - Jing Bai
- College of Agriculture and Biotechnology Loudi Hunan China
| | - Yu Zhen
- College of Agriculture and Biotechnology Loudi Hunan China
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Yang H, Yang X, Ning Z, Kwon SY, Li ML, Tack FMG, Kwon EE, Rinklebe J, Yin R. The beneficial and hazardous effects of selenium on the health of the soil-plant-human system: An overview. JOURNAL OF HAZARDOUS MATERIALS 2022; 422:126876. [PMID: 34416699 DOI: 10.1016/j.jhazmat.2021.126876] [Citation(s) in RCA: 68] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 07/25/2021] [Accepted: 08/07/2021] [Indexed: 06/13/2023]
Abstract
Selenium (Se), which can be both hazardous and beneficial to plants, animals and humans, plays a pivotal role in regulating soil-plant-human ecosystem functions. The biogeochemical behavior of Se and its environmental impact on the soil-plant-human system has received broad attention in the last decades. This review provides a comprehensive understanding of Se biogeochemistry in the soil-plant-human system. The speciation, transformation, bioavailability as well as the beneficial and hazardous effects of Se in the soil-plant-human system are summarized. Several important aspects in Se in the soil-plant-human system are detailed mentioned, including (1) strategies for biofortification in Se-deficient areas and phytoremediation of soil Se in seleniferous areas; (2) factors affecting Se uptake and transport by plants; (3) metabolic pathways of Se in the human body; (4) the interactions between Se and other trace elements in plant and animals, in particular, the detoxification of heavy metals by Se. Important research hotspots of Se biogeochemistry are outlined, including (1) the coupling of soil microbial activity and the Se biogeochemical cycle; (2) the molecular mechanism of Se metabolic in plants and animals; and (3) the application of Se isotopes as a biogeochemical tracer in research. This review provides up-to-date knowledge and guidelines on Se biogeochemistry research.
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Affiliation(s)
- Hui Yang
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; Guizhou Academy of Tobacco Science, 550081 Guiyang, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xuefeng Yang
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zengping Ning
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Sae Yun Kwon
- Division of Environmental Science & Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam Gu, Pohang 37673, South Korea
| | - Mi-Ling Li
- School of Marine Science and Policy, University of Delaware, Newark, DE 19716 USA
| | - Filip M G Tack
- Ghent University, Department of Green Chemistry and Technology, Ghent, Belgium
| | - Eilhann E Kwon
- Department of Environment, Energy and Geoinformatics, Sejong University, 98 Gunja-Dong, Guangjin-Gu, Seoul, Republic of Korea
| | - Jörg Rinklebe
- Department of Environment, Energy and Geoinformatics, Sejong University, 98 Gunja-Dong, Guangjin-Gu, Seoul, Republic of Korea; University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water and Waste Management, Laboratory of Soil and Groundwater Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany
| | - Runsheng Yin
- State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China.
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Poria V, Dębiec-Andrzejewska K, Fiodor A, Lyzohub M, Ajijah N, Singh S, Pranaw K. Plant Growth-Promoting Bacteria (PGPB) integrated phytotechnology: A sustainable approach for remediation of marginal lands. FRONTIERS IN PLANT SCIENCE 2022; 13:999866. [PMID: 36340355 PMCID: PMC9634634 DOI: 10.3389/fpls.2022.999866] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 10/04/2022] [Indexed: 05/13/2023]
Abstract
Land that has little to no utility for agriculture or industry is considered marginal land. This kind of terrain is frequently found on the edge of deserts or other arid regions. The amount of land that can be used for agriculture continues to be constrained by increasing desertification, which is being caused by climate change and the deterioration of agriculturally marginal areas. Plants and associated microorganisms are used to remediate and enhance the soil quality of marginal land. They represent a low-cost and usually long-term solution for restoring soil fertility. Among various phytoremediation processes (viz., phytodegradation, phytoextraction, phytostabilization, phytovolatilization, phytofiltration, phytostimulation, and phytodesalination), the employment of a specific mechanism is determined by the state of the soil, the presence and concentration of contaminants, and the plant species involved. This review focuses on the key economically important plants used for phytoremediation, as well as the challenges to plant growth and phytoremediation capability with emphasis on the advantages and limits of plant growth in marginal land soil. Plant growth-promoting bacteria (PGPB) boost plant development and promote soil bioremediation by secreting a variety of metabolites and hormones, through nitrogen fixation, and by increasing other nutrients' bioavailability through mineral solubilization. This review also emphasizes the role of PGPB under different abiotic stresses, including heavy-metal-contaminated land, high salinity environments, and organic contaminants. In our opinion, the improved soil fertility of marginal lands using PGPB with economically significant plants (e.g., Miscanthus) in dual precession technology will result in the reclamation of general agriculture as well as the restoration of native vegetation.
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Affiliation(s)
- Vikram Poria
- Department of Microbiology, Central University of Haryana, Mahendergarh, India
| | - Klaudia Dębiec-Andrzejewska
- Department of Environmental Microbiology and Biotechnology, Institute of Microbiology, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Angelika Fiodor
- Department of Environmental Microbiology and Biotechnology, Institute of Microbiology, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Marharyta Lyzohub
- Department of Environmental Microbiology and Biotechnology, Institute of Microbiology, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Nur Ajijah
- Department of Environmental Microbiology and Biotechnology, Institute of Microbiology, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Surender Singh
- Department of Microbiology, Central University of Haryana, Mahendergarh, India
| | - Kumar Pranaw
- Department of Environmental Microbiology and Biotechnology, Institute of Microbiology, Faculty of Biology, University of Warsaw, Warsaw, Poland
- *Correspondence: Kumar Pranaw, ;
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11
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Yang D, Hu C, Wang X, Shi G, Li Y, Fei Y, Song Y, Zhao X. Microbes: a potential tool for selenium biofortification. Metallomics 2021; 13:6363703. [PMID: 34477877 DOI: 10.1093/mtomcs/mfab054] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Accepted: 08/19/2021] [Indexed: 11/14/2022]
Abstract
Selenium (Se) is a component of many enzymes and indispensable for human health due to its characteristics of reducing oxidative stress and enhancing immunity. Human beings take Se mainly from Se-containing crops. Taking measures to biofortify crops with Se may lead to improved public health. Se accumulation in plants mainly depends on the content and bioavailability of Se in soil. Beneficial microbes may change the chemical form and bioavailability of Se. This review highlights the potential role of microbes in promoting Se uptake and accumulation in crops and the related mechanisms. The potential approaches of microbial enhancement of Se biofortification can be summarized in the following four aspects: (1) microbes alter soil properties and impact the redox chemistry of Se to improve the bioavailability of Se in soil; (2) beneficial microbes regulate root morphology and stimulate the development of plants through the release of certain secretions, facilitating Se uptake in plants; (3) microbes upregulate the expression of certain genes and proteins that are related to Se metabolism in plants; and (4) the inoculation of microbes give rise to the generation of certain metabolites in plants contributing to Se absorption. Considering the ecological safety and economic feasibility, microbial enhancement is a potential tool for Se biofortification. For further study, the recombination and establishment of synthesis microbes is of potential benefit in Se-enrichment agriculture.
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Affiliation(s)
- Dandan Yang
- College of Resources and Environment, Huazhong Agricultural University/Hubei Provincial, Engineering Laboratory for New-Type Fertilizer/Research Center of Trace Elements/Hubei Key Laboratory of Soil Environment and Pollution Remediation, Wuhan 430070, China
| | - Chengxiao Hu
- College of Resources and Environment, Huazhong Agricultural University/Hubei Provincial, Engineering Laboratory for New-Type Fertilizer/Research Center of Trace Elements/Hubei Key Laboratory of Soil Environment and Pollution Remediation, Wuhan 430070, China
| | - Xu Wang
- Institute of Quality Standard and Monitoring Technology for Agro-product of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
| | - Guangyu Shi
- College of Environment Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Yanfeng Li
- College of Resources and Environment, Huazhong Agricultural University/Hubei Provincial, Engineering Laboratory for New-Type Fertilizer/Research Center of Trace Elements/Hubei Key Laboratory of Soil Environment and Pollution Remediation, Wuhan 430070, China
| | - Yuchen Fei
- College of Resources and Environment, Huazhong Agricultural University/Hubei Provincial, Engineering Laboratory for New-Type Fertilizer/Research Center of Trace Elements/Hubei Key Laboratory of Soil Environment and Pollution Remediation, Wuhan 430070, China
| | - Yinran Song
- College of Resources and Environment, Huazhong Agricultural University/Hubei Provincial, Engineering Laboratory for New-Type Fertilizer/Research Center of Trace Elements/Hubei Key Laboratory of Soil Environment and Pollution Remediation, Wuhan 430070, China
| | - Xiaohu Zhao
- College of Resources and Environment, Huazhong Agricultural University/Hubei Provincial, Engineering Laboratory for New-Type Fertilizer/Research Center of Trace Elements/Hubei Key Laboratory of Soil Environment and Pollution Remediation, Wuhan 430070, China.,Institute of Quality Standard and Monitoring Technology for Agro-product of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
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12
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Golubkina N, Moldovan A, Kekina H, Kharchenko V, Sekara A, Vasileva V, Skrypnik L, Tallarita A, Caruso G. Joint Biofortification of Plants with Selenium and Iodine: New Field of Discoveries. PLANTS (BASEL, SWITZERLAND) 2021; 10:1352. [PMID: 34371555 PMCID: PMC8309223 DOI: 10.3390/plants10071352] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 06/29/2021] [Accepted: 06/29/2021] [Indexed: 05/04/2023]
Abstract
The essentiality of selenium (Se) and iodine (I) to human beings and the widespread areas of selenium and iodine deficiency determine the high significance of functional food production with high levels of these elements. In this respect, joint biofortification of agricultural crops with Se and I is especially attractive. Nevertheless, in practice this topic has raised many problems connected with the possible utilization of many Se and I chemical forms, different doses and biofortification methods, and the existence of wide species and varietal differences. The limited reports relevant to this subject and the multiplicity of unsolved questions urge the need for an adequate evaluation of the results obtained up-to-date, useful for developing further future investigations. The present review discusses the outcome of joint plant Se-I biofortification, as well as factors affecting Se and I accumulation in plants, paying special attention to unsolved issues. A particular focus has been given to the prospects of herb sprouts production enriched with Se and I, as well as the interactions between the latter microelements and arbuscular-mycorrhizal fungi (AMF).
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Affiliation(s)
- Nadezhda Golubkina
- Laboratory Analytical Department, Federal Scientific Center of Vegetable Production, Moscow 143072, Russia; (A.M.); (V.K.)
| | - Anastasia Moldovan
- Laboratory Analytical Department, Federal Scientific Center of Vegetable Production, Moscow 143072, Russia; (A.M.); (V.K.)
| | - Helene Kekina
- Medical Academy of Post Graduate Education, Moscow 123995, Russia;
| | - Victor Kharchenko
- Laboratory Analytical Department, Federal Scientific Center of Vegetable Production, Moscow 143072, Russia; (A.M.); (V.K.)
| | - Agnieszka Sekara
- Department of Horticulture, Faculty of Biotechnology and Horticulture, University of Agriculture, 31-120 Krakow, Poland;
| | - Viliana Vasileva
- Institute of Forage Crops, 89 General Vladimir Vazov Str, 5802 Pleven, Bulgaria;
| | - Liubov Skrypnik
- Institute of Living Systems, Immanuel Kant Baltic Federal University, Kaliningrad 236040, Russia;
| | - Alessio Tallarita
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Naples, Italy; (A.T.); (G.C.)
| | - Gianluca Caruso
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Naples, Italy; (A.T.); (G.C.)
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13
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Abstract
Abandoned mine lands (AMLs), which are considered some of the most dangerous anthropogenic activities in the world, are a source of hazards relating to potentially toxic elements (PTEs). Traditional reclamation techniques, which are expensive, time-consuming and not well accepted by the general public, cannot be used on a large scale. However, plant-based techniques have gained acceptance as an environmentally friendly alternative over the last 20 years. Plants can be used in AMLs for PTE phytoextraction, phytostabilization, and phytovolatilization. We reviewed these phytoremediation techniques, paying particular attention to the selection of appropriate plants in each case. In order to assess the suitability of plants for phytoremediation purposes, the accumulation capacity and tolerance mechanisms of PTEs was described. We also compiled a collection of interesting actual examples of AML phytoremediation. On-site studies have shown positive results in terms of soil quality improvement, reduced PTE bioavailability, and increased biodiversity. However, phytoremediation strategies need to better characterize potential plant candidates in order to improve PTE extraction and to reduce the negative impact on AMLs.
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14
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Ważny R, Rozpądek P, Domka A, Jędrzejczyk RJ, Nosek M, Hubalewska-Mazgaj M, Lichtscheidl I, Kidd P, Turnau K. The effect of endophytic fungi on growth and nickel accumulation in Noccaea hyperaccumulators. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 768:144666. [PMID: 33736318 DOI: 10.1016/j.scitotenv.2020.144666] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 12/02/2020] [Accepted: 12/16/2020] [Indexed: 05/05/2023]
Abstract
The role of endophytic fungi isolated from different populations of European Ni hyperaccumulators was investigated in regard to the microorganisms' ability to enhance the hyperaccumulation of Ni in Noccaea caerulescens. Effects of particular species of endophytic fungi on adaptation of N. caerulescens to excess Ni were tested by co-cultivation with single strains of the fungi. Seven of these had a positive effect on plant biomass production, whereas two of the tested species inhibited plant growth; biomass production of inoculated plants was significantly different compared to non-inoculated control. Inoculation with six fungal strains: Embellisia thlaspis, Pyrenochaeta cava, Phomopsis columnaris, Plectosphaerella cucumerina, Cladosporium cladosporioides and Alternaria sp. stimulated the plant to uptake and accumulate more Ni in both roots and shoots, compared to non-inoculated control. P. columnaris was isolated from all plant species sampled. Strains isolated from Noccaea caerulescens and Noccaea goesingensis increased Ni root and shoot accumulation of their native hosts (compared to non-inoculated control). Inoculation of different populations of Noccaea with P. columnaris of foreign origin did not cause its host to accumulate more Ni, with the exception of the Ni-unadapted ecotype of N. goesingensis. Inoculation with P. columnaris from N. caerulescens significantly improved Ni uptake, but the effect of the fungus was not as prominent as in the case of N. caerulescens. By comparing the transcriptomes of N. caerulescens and N. goesingensis from Flatz inoculated with P. columnaris, we showed that enhanced uptake and accumulation of Ni in the plants is accompanied by an upregulation of several genes mainly involved in plant stress protection and metal uptake and compartmentation.
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Affiliation(s)
- Rafał Ważny
- Małopolska Centre of Biotechnology, Jagiellonian University in Kraków, Gronostajowa 7a, 30-387 Kraków, Poland.
| | - Piotr Rozpądek
- Małopolska Centre of Biotechnology, Jagiellonian University in Kraków, Gronostajowa 7a, 30-387 Kraków, Poland
| | - Agnieszka Domka
- Małopolska Centre of Biotechnology, Jagiellonian University in Kraków, Gronostajowa 7a, 30-387 Kraków, Poland
| | - Roman J Jędrzejczyk
- Małopolska Centre of Biotechnology, Jagiellonian University in Kraków, Gronostajowa 7a, 30-387 Kraków, Poland
| | - Michał Nosek
- Institute of Biology, Pedagogical University, Podchorążych 2, 30-084 Kraków, Poland
| | | | - Irene Lichtscheidl
- Core Facility of Cell Imaging and Ultrastructure Research, University of Vienna, Austria
| | - Petra Kidd
- Instituto de Investigaciones Agrobiológicas de Galicia, Consejo Superior de Investigaciones Científicas (CSIC), Av. de Vigo, 15705 Santiago de Compostela, Spain
| | - Katarzyna Turnau
- Institute of Environmental Sciences, Jagiellonian University in Kraków, Gronostajowa 7, 30-387 Kraków, Poland
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15
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Microbial Community Composition Correlates with Metal Sorption in an Ombrotrophic Boreal Bog: Implications for Radionuclide Retention. SOIL SYSTEMS 2021. [DOI: 10.3390/soilsystems5010019] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Microbial communities throughout the 6.5 m depth profile of a boreal ombrotrophic bog were characterized using amplicon sequencing of archaeal, fungal, and bacterial marker genes. Microbial populations and their relationship to oxic and anoxic batch sorption of radionuclides (using radioactive tracers of I, Se, Cs, Ni, and Ag) and the prevailing metal concentrations in the natural bog was investigated. The majority of the detected archaea belonged to the Crenarchaeota, Halobacterota, and Thermoplasmatota, whereas the fungal communities consisted of Ascomycota, Basidiomycota, and unclassified fungi. The bacterial communities consisted mostly of Acidobacteriota, Proteobacteria, and Chloroflexi. The occurrence of several microbial genera were found to statistically significantly correlate with metal concentrations as well as with Se, Cs, I, and Ag batch sorption data. We suggest that the metal concentrations of peat, gyttja, and clay layers affect the composition of the microbial populations in these nutrient-low conditions and that particularly parts of the bacterial and archaeal communities tolerate high concentrations of potentially toxic metals and may concurrently contribute to the total retention of metals and radionuclides in this ombrotrophic environment. In addition, the varying metal concentrations together with chemical, mineralogical, and physical factors may contribute to the shape of the total archaeal and bacterial populations and most probably shifts the populations for more metal resistant genera.
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16
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Favorito JE, Grossl PR, Davis TZ, Eick MJ, Hankes N. Soil-plant-animal relationships and geochemistry of selenium in the Western Phosphate Resource Area (United States): A review. CHEMOSPHERE 2021; 266:128959. [PMID: 33279237 DOI: 10.1016/j.chemosphere.2020.128959] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 11/06/2020] [Accepted: 11/10/2020] [Indexed: 06/12/2023]
Abstract
While naturally found in trace quantities, several regions throughout the world have been designated as "seleniferous" or containing an overabundance of the trace element, selenium (Se), in soil. In particular, portions of the Western Phosphate Resource Area (WPRA) of the United States are considered seleniferous, notably due to past phosphate mining reclamation practices that have promoted Se release and accumulation in soil from weathering overburden waste rock. Concern over Se soil contamination in this region has been attributed to its high levels (ranging from 2.7 to 435 mg Se kg-1 soil), bioavailability, and subsequent hyperaccumulation in vegetation at toxic concentrations (exceeding 10,000 mg Se kg-1 plant tissue). The Se hyperaccumulator, western aster (Symphyotrichum ascendens (Lindl.)), is responsible for the vast majority of acute selenium livestock poisonings and fatalities throughout the region. This inherent bioavailability is largely controlled by soil redox chemistry and sorptive processes. The purpose of this review is to integrate information related to the unique site history of the WPRA from onset mining to current Se problems. This review will provide current details and connection of WPRA mining geology, soil Se geochemistry, plant hyperaccumulation, and related livestock fatalities. Soil remediation strategies will also be discussed along with their applicability and viability in this particular anthropogenically-influenced seleniferous region.
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Affiliation(s)
- Jessica E Favorito
- Environmental Science Program, 101 Vera King Farris Dr., Stockton University, Galloway, NJ, 08205, USA.
| | - Paul R Grossl
- Department of Plants, Soils, and Climate, 4820 Old Main Hill, Utah State University, Logan, UT, 84322, USA.
| | - Thomas Zane Davis
- USDA-ARS Poisonous Plant Research, 1150 East 1400 North, Logan, UT, 84341, USA.
| | - Matthew J Eick
- Department of Crop and Soil Environmental Sciences, 185 Ag Quad Ln, 237 Smyth Hall, Virginia Polytechnic Institute and State University, Blacksburg, VA, 24061, USA.
| | - Nathan Hankes
- Department of Plants, Soils, and Climate, 4820 Old Main Hill, Utah State University, Logan, UT, 84322, USA.
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17
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Selenium Biofortification: Roles, Mechanisms, Responses and Prospects. Molecules 2021; 26:molecules26040881. [PMID: 33562416 PMCID: PMC7914768 DOI: 10.3390/molecules26040881] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 01/28/2021] [Accepted: 02/05/2021] [Indexed: 12/16/2022] Open
Abstract
The trace element selenium (Se) is a crucial element for many living organisms, including soil microorganisms, plants and animals, including humans. Generally, in Nature Se is taken up in the living cells of microorganisms, plants, animals and humans in several inorganic forms such as selenate, selenite, elemental Se and selenide. These forms are converted to organic forms by biological process, mostly as the two selenoamino acids selenocysteine (SeCys) and selenomethionine (SeMet). The biological systems of plants, animals and humans can fix these amino acids into Se-containing proteins by a modest replacement of methionine with SeMet. While the form SeCys is usually present in the active site of enzymes, which is essential for catalytic activity. Within human cells, organic forms of Se are significant for the accurate functioning of the immune and reproductive systems, the thyroid and the brain, and to enzyme activity within cells. Humans ingest Se through plant and animal foods rich in the element. The concentration of Se in foodstuffs depends on the presence of available forms of Se in soils and its uptake and accumulation by plants and herbivorous animals. Therefore, improving the availability of Se to plants is, therefore, a potential pathway to overcoming human Se deficiencies. Among these prospective pathways, the Se-biofortification of plants has already been established as a pioneering approach for producing Se-enriched agricultural products. To achieve this desirable aim of Se-biofortification, molecular breeding and genetic engineering in combination with novel agronomic and edaphic management approaches should be combined. This current review summarizes the roles, responses, prospects and mechanisms of Se in human nutrition. It also elaborates how biofortification is a plausible approach to resolving Se-deficiency in humans and other animals.
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18
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Harindintwali JD, Zhou J, Yang W, Gu Q, Yu X. Biochar-bacteria-plant partnerships: Eco-solutions for tackling heavy metal pollution. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 204:111020. [PMID: 32810706 DOI: 10.1016/j.ecoenv.2020.111020] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 07/06/2020] [Accepted: 07/08/2020] [Indexed: 05/22/2023]
Abstract
Over the past 30 years, the ever-rising demands of the modern and growing population have led to the rapid development of agricultural and industrial sectors worldwide. However, this expansion has exposed the environment to various pollutants including heavy metal (HM)s. Almost all HMs are serious toxicants and can pose serious health risks to living organisms in addition to their bioaccumulative and non-biodegradable nature. Different techniques have been developed to restore the ecological functions of the HM-contaminated soil (HMCS). However, the major downfalls of the commonly used remediation technologies are the generation of secondary wastes, high operating costs, and high energy consumption. Phytoremediation is a prominent approach that is more innocuous than the existing remediation approaches. Some microbes-plant interactions enhance the bioremediation process, with heavy metal resistant-plant growth promoting bacteria (HMRPGPB) being widely used to assist phytoremediation of HMs. However, the most common of all major microbial assisted-phytoremediation disturbances is that the HM-contaminated soil is generally deficient in nutrients and cannot sustain the rapid growth of the applied HMRPGPB. In this case, biochar has recently been approved as a potential carrier of microbial agents. The biochar-HMRPGPB-plant association could provide a promising green approach to remediate HM-polluted sites. Therefore, this review addresses the mechanisms through which biochar and HMRPGPB can enhance phytoremediation. This knowledge of biochar-HMRPGPB-plant interactions is significant with respect to sustainable management of the HM-polluted environment in terms of both ecology and economy, and it offers the possibility of further development of new green technologies.
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Affiliation(s)
- Jean Damascene Harindintwali
- The Key Laboratory of Carbohydrate Chemistry & Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Li-Hu Road, Bin-Hu District, Wuxi, 214122, China
| | - Jianli Zhou
- The Key Laboratory of Carbohydrate Chemistry & Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Li-Hu Road, Bin-Hu District, Wuxi, 214122, China; School of Food and Drug Manufacturing Engineering, Guizhou Institute of Technology, 1 Caiguan Road, Guiyang, 550003, China
| | - Wenhua Yang
- The Key Laboratory of Carbohydrate Chemistry & Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Li-Hu Road, Bin-Hu District, Wuxi, 214122, China
| | - Qiuya Gu
- The Key Laboratory of Carbohydrate Chemistry & Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Li-Hu Road, Bin-Hu District, Wuxi, 214122, China
| | - Xiaobin Yu
- The Key Laboratory of Carbohydrate Chemistry & Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Li-Hu Road, Bin-Hu District, Wuxi, 214122, China.
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19
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Sarwar N, Akhtar M, Kamran MA, Imran M, Riaz MA, Kamran K, Hussain S. Selenium biofortification in food crops: Key mechanisms and future perspectives. J Food Compost Anal 2020. [DOI: 10.1016/j.jfca.2020.103615] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Ye Y, Qu J, Pu Y, Rao S, Xu F, Wu C. Selenium Biofortification of Crop Food by Beneficial Microorganisms. J Fungi (Basel) 2020; 6:jof6020059. [PMID: 32375266 PMCID: PMC7344654 DOI: 10.3390/jof6020059] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/25/2020] [Accepted: 04/26/2020] [Indexed: 12/20/2022] Open
Abstract
Selenium (Se) is essential for human health, however, Se is deficient in soil in many places all around the world, resulting in human diseases, such as notorious Keshan disease and Keshin–Beck disease. Therefore, Se biofortification is a popular approach to improve Se uptake and maintain human health. Beneficial microorganisms, including mycorrhizal and root endophytic fungi, dark septate fungi, and plant growth-promoting rhizobacteria (PGPRs), show multiple functions, especially increased plant nutrition uptake, growth and yield, and resistance to abiotic stresses. Such functions can be used for Se biofortification and increased growth and yield under drought and salt stress. The present review summarizes the use of mycorrhizal fungi and PGPRs in Se biofortification, aiming to improving their practical use.
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Affiliation(s)
| | | | | | | | | | - Chu Wu
- Correspondence: ; Tel.: +86-716-806-6262
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21
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Lusa M, Help H, Honkanen AP, Knuutinen J, Parkkonen J, Kalasová D, Bomberg M. The reduction of selenium(IV) by boreal Pseudomonas sp. strain T5-6-I - Effects on selenium(IV) uptake in Brassica oleracea. ENVIRONMENTAL RESEARCH 2019; 177:108642. [PMID: 31430668 DOI: 10.1016/j.envres.2019.108642] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 08/07/2019] [Accepted: 08/08/2019] [Indexed: 06/10/2023]
Abstract
Selenium (Se) is an essential micronutrient but toxic when taken in excessive amounts. Therefore, understanding the metabolic processes related to selenium uptake and bacteria-plant interactions coupled with selenium metabolism are of high importance. We cultivated Brassica oleracea with the previously isolated heterotrophic aerobic Se(IV)-reducing Pseudomonas sp. T5-6-I strain to better understand the phenomena of bacteria-mediated Se(IV) reduction on selenium availability to the plants. B. oleracea grown on Murashige and Skoog medium (MS-salt agar) with and without of Pseudomonas sp. were amended with Se(IV)/75Se(IV), and selenium transfer into plants was studied using autoradiography and gamma spectroscopy. XANES was in addition used to study the speciation of selenium in the B. oleracea plants. In addition, the effects of Se(IV) on the protein expression in B. oleracea was studied using HPLC-SEC. TEM and confocal microscopy were used to follow the bacterial/Se-aggregate accumulation in plants and the effects of bacterial inoculation on root-hair growth. In the tests using 75Se(IV) on average 130% more selenium was translocated to the B. oleracea plants grown with Pseudomonas sp. compared to the plants grown with selenium, but without Pseudomonas sp.. In addition, these bacteria notably increased root hair density. Changes in the protein expression of B. oleracea were observed on the ∼30-58 kDa regions in the Se(IV) treated samples, probably connected e.g. to the oxidative stress induced by Se(IV) or expression of proteins connected to the Se(IV) metabolism. Based on the XANES measurements, selenium appears to accumulate in B. oleracea mainly in organic C-Se-H and C-Se-C bonds with and without bacteria inoculation. We conclude that the Pseudomonas sp. T5-6-I strain seems to contribute positively to the selenium accumulation in plants, establishing the high potential of Se0-producing bacteria in the use of phytoremediation and biofortification of selenium.
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Affiliation(s)
- Merja Lusa
- Department of Chemistry, Radiochemistry, Faculty of Science, University of Helsinki, Finland.
| | - Hanna Help
- Department of Physics, X-Ray Laboratory, Faculty of Science, University of Helsinki, Finland
| | - Ari-Pekka Honkanen
- Department of Physics, X-Ray Laboratory, Faculty of Science, University of Helsinki, Finland
| | - Jenna Knuutinen
- Department of Chemistry, Radiochemistry, Faculty of Science, University of Helsinki, Finland
| | | | - Dominika Kalasová
- CEITEC - Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic
| | - Malin Bomberg
- Material Recycling and Geotechnology, VTT, Technical Research Center of Finland, Espoo, Finland
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22
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Pilon-Smits EAH. On the Ecology of Selenium Accumulation in Plants. PLANTS (BASEL, SWITZERLAND) 2019; 8:E197. [PMID: 31262007 PMCID: PMC6681216 DOI: 10.3390/plants8070197] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 05/17/2019] [Accepted: 06/27/2019] [Indexed: 11/17/2022]
Abstract
Plants accumulate and tolerate Se to varying degrees, up to 15,000 mg Se/kg dry weight for Se hyperaccumulators. Plant Se accumulation may exert positive or negative effects on other species in the community. The movement of plant Se into ecological partners may benefit them at low concentrations, but cause toxicity at high concentrations. Thus, Se accumulation can protect plants against Se-sensitive herbivores and pathogens (elemental defense) and reduce surrounding vegetation cover via high-Se litter deposition (elemental allelopathy). While hyperaccumulators negatively impact Se-sensitive ecological partners, they offer a niche for Se-tolerant partners, including beneficial microbial and pollinator symbionts as well as detrimental herbivores, pathogens, and competing plant species. These ecological effects of plant Se accumulation may facilitate the evolution of Se resistance in symbionts. Conversely, Se hyperaccumulation may evolve driven by increasing Se resistance in herbivores, pathogens, or plant neighbors; Se resistance also evolves in mutualist symbionts, minimizing the plant's ecological cost. Interesting topics to address in future research are whether the ecological impacts of plant Se accumulation may affect species composition across trophic levels (favoring Se resistant taxa), and to what extent Se hyperaccumulators form a portal for Se into the local food chain and are important for Se cycling in the local ecosystem.
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23
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Golubkina N, Zamana S, Seredin T, Poluboyarinov P, Sokolov S, Baranova H, Krivenkov L, Pietrantonio L, Caruso G. Effect of Selenium Biofortification and Beneficial Microorganism Inoculation on Yield, Quality and Antioxidant Properties of Shallot Bulbs. PLANTS 2019; 8:plants8040102. [PMID: 30999682 PMCID: PMC6524039 DOI: 10.3390/plants8040102] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 04/15/2019] [Accepted: 04/16/2019] [Indexed: 01/08/2023]
Abstract
Plant biofortification with selenium in interaction with the application of an arbuscular mycorrhizal fungi (AMF)-based formulate, with the goal of enhancing Se bioavailability, is beneficial for the development of the environmentally friendly production of functional food with a high content of this microelement. Research was carried out in order to assess the effects of an AMF-based formulate and a non-inoculated control in factorial combination with two selenium treatments with an organic (selenocystine) or inorganic form (sodium selenate) and a non-treated control on the yield, quality, antioxidant properties, and elemental composition of shallot (Allium cepa L. Aggregatum group). Selenocystine showed the best effect on the growth and yield of mycorrhized plants, whereas sodium selenate was the most effective on the non-inoculated plants. The soluble solids, total sugars, monosaccharides, titratable acidity, and proteins attained higher values upon AMF inoculation. Sodium selenate resulted in higher soluble solids, total sugars and monosaccharide content, and titratable acidity than the non-treated control, and it also resulted in higher monosaccharides when compared to selenocystine; the latter showed higher protein content than the control. Calcium, Na, S, and Cl bulb concentrations were higher in the plants inoculated with the beneficial microorganisms. Calcium and sodium concentrations were higher in the bulbs of plants treated with both the selenium forms than in the control. Selenocystine-treated plants showed enhanced accumulation of sulfur and chlorine compared to the untreated plants. The AMF inoculation increased the bulb selenium content by 530%, and the Se biofortification with selenocystine and sodium selenate increased this value by 36% and 21%, respectively, compared to control plants. The AMF-based formulate led to increases in ascorbic acid and antioxidant activity when compared to the non-inoculated control. The bulb ascorbic acid was increased by fortification with both selenium forms when compared to the non-treated control. The results of our investigation showed that both AMF and selenium application represent environmentally friendly strategies to enhance the overall yield and quality performances of shallot bulbs, as well as their selenium content.
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Affiliation(s)
- Nadezhda Golubkina
- Federal Scientific Center of Vegetable Production, Selectsionnaya str. 14, VNIISSOK, Odintsovo district, Moscow region 143072, Russia.
| | - Svetlana Zamana
- State University of Land Management, Kazakova str. 15, 10506 Moscow, Russia.
| | - Timofei Seredin
- Federal Scientific Center of Vegetable Production, Selectsionnaya str. 14, VNIISSOK, Odintsovo district, Moscow region 143072, Russia.
| | - Pavel Poluboyarinov
- Penza State University of Architecture and Construction, Titova str. 28, 440028 Penza, Russia.
| | - Sergei Sokolov
- Scientific Technical Center 'Sustainable Development of Agroecosystems', 143072 Moscow, Russia.
| | - Helene Baranova
- Federal Scientific Center of Vegetable Production, Selectsionnaya str. 14, VNIISSOK, Odintsovo district, Moscow region 143072, Russia.
| | - Leonid Krivenkov
- Federal Scientific Center of Vegetable Production, Selectsionnaya str. 14, VNIISSOK, Odintsovo district, Moscow region 143072, Russia.
| | - Laura Pietrantonio
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Naples, Italy.
| | - Gianluca Caruso
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Naples, Italy.
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Lindblom SD, Wangeline AL, Valdez Barillas JR, Devilbiss B, Fakra SC, Pilon-Smits EAH. Fungal Endophyte Alternaria tenuissima Can Affect Growth and Selenium Accumulation in Its Hyperaccumulator Host Astragalus bisulcatus. FRONTIERS IN PLANT SCIENCE 2018; 9:1213. [PMID: 30177943 PMCID: PMC6109757 DOI: 10.3389/fpls.2018.01213] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 07/27/2018] [Indexed: 05/13/2023]
Abstract
Endophytes can enhance plant stress tolerance by promoting growth and affecting elemental accumulation, which may be useful in phytoremediation. In earlier studies, up to 35% elemental selenium (Se0) was found in Se hyperaccumulator Astragalus bisulcatus. Since Se0 can be produced by microbes, the plant Se0 was hypothesized to be microbe-derived. Here we characterize a fungal endophyte of A. bisulcatus named A2. It is common in seeds from natural seleniferous habitat containing 1,000-10,000 mg kg-1 Se. We identified A2 as Alternaria tenuissima via 18S rRNA sequence analysis and morphological characterization. X-ray microprobe analysis of A. bisulcatus seeds that did or did not harbor Alternaria, showed that both contained >90% organic seleno-compounds with C-Se-C configuration, likely methylselenocysteine and glutamyl-methylselenocysteine. The seed Se was concentrated in the embryo, not the seed coat. X-ray microprobe analysis of A2 in pure culture showed the fungus produced Se0 when supplied with selenite, but accumulated mainly organic C-Se-C compounds when supplied with selenate. A2 was completely resistant to selenate up to 300 mg L-1, moderately resistant to selenite (50% inhibition at ∼50 mg Se L-1), but relatively sensitive to methylselenocysteine and to Se extracted from A. bisulcatus (50% inhibition at 25 mg Se L-1). Four-week old A. bisulcatus seedlings derived from surface-sterilized seeds containing endophytic Alternaria were up to threefold larger than seeds obtained from seeds not showing evidence of fungal colonization. When supplied with Se, the Alternaria-colonized seedlings had lower shoot Se and sulfur levels than seedlings from uncolonized seeds. In conclusion, A. tenuissima may contribute to the Se0 observed earlier in A. bisulcatus, and affect host growth and Se accumulation. A2 is sensitive to the Se levels found in its host's tissues, but may avoid Se toxicity by occupying low-Se areas (seed coat, apoplast) and converting plant Se to non-toxic Se0. These findings illustrate the potential for hyperaccumulator endophytes to affect plant properties relevant for phytoremediation. Facultative endophytes may also be applicable in bioremediation and biofortification, owing to their capacity to turn toxic inorganic forms of Se into non-toxic or even beneficial, organic forms with anticarcinogenic properties.
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Affiliation(s)
- Stormy D. Lindblom
- Department of Biology, Colorado State University, Fort Collins, CO, United States
| | - Ami L. Wangeline
- Department of Biology, Laramie County Community College, Cheyenne, WY, United States
| | - Jose R. Valdez Barillas
- Department of Biology, Colorado State University, Fort Collins, CO, United States
- Department of Sciences and Mathematics, Texas A&M University-San Antonio, San Antonio, TX, United States
| | - Berthal Devilbiss
- Department of Biology, Laramie County Community College, Cheyenne, WY, United States
| | - Sirine C. Fakra
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
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Martin AJ, Fraser C, Simpson S, Belzile N, Chen YW, London J, Wallschläger D. Hydrological and biogeochemical controls governing the speciation and accumulation of selenium in a wetland influenced by mine drainage. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2018; 37:1824-1838. [PMID: 29480546 DOI: 10.1002/etc.4123] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 02/15/2018] [Accepted: 02/23/2018] [Indexed: 06/08/2023]
Abstract
Controls governing the speciation and accumulation of Se in a 3.7-ha marsh influenced by mine drainage were assessed through examination of water balance, water quality, sediment, and plant tissue components. Over the 8-mo study period (April through November, 2009), mean monthly flows ranged from 1600 to 2300 m3 d-1 (hydraulic retention time of 1-3 d). Total Se concentrations in the marsh outflow were lower than the inflow by 0.4 to 6.2 μg L-1 (mean difference = 3.3 μg L-1 ), illustrating Se removal. The Se accumulation pathways are illustrated by elevated concentrations of Se in sediments (3-35 mg kg-1 dry wt) as well as in below-ground (2-41 mg kg-1 dry wt; mean = 10 mg kg-1 dry wt) and above-ground (0.8-6.3 mg kg-1 dry wt; mean = 2 mg kg-1 dry wt) emergent plant tissues. Redox stratification in the shallow water column had a marked effect on Se speciation and behavior, illustrating bottom water removal of dissolved selenate in suboxic horizons and increased mobility of dissolved organo-Se. Mass balance data yielded inflow and outflow loading rates for Se of 27 and 23 g d-1 , respectively (net accumulation rate of 4 g d-1 or 0.11 mg m2 d-1 ). The rate of accumulation as calculated from the mass balance agrees with independently measured rates of Se accumulation in sediments for the site (3.6-8.1 g d-1 or 0.10-0.22 mg m-2 d-1 ). Environ Toxicol Chem 2018;37:1824-1838. © 2018 SETAC.
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Affiliation(s)
- Alan J Martin
- Lorax Environmental Services, Vancouver, British Columbia, Canada
| | - Colin Fraser
- Lorax Environmental Services, Vancouver, British Columbia, Canada
| | | | | | - Y-W Chen
- Laurentian University, Sudbury, Ontario, Canada
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26
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Vogel M, Fischer S, Maffert A, Hübner R, Scheinost AC, Franzen C, Steudtner R. Biotransformation and detoxification of selenite by microbial biogenesis of selenium-sulfur nanoparticles. JOURNAL OF HAZARDOUS MATERIALS 2018; 344:749-757. [PMID: 29156387 DOI: 10.1016/j.jhazmat.2017.10.034] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 09/27/2017] [Accepted: 10/16/2017] [Indexed: 05/27/2023]
Abstract
This study combines the interaction between the toxic oxyanions selenite and selenate and the plant growth promoting bacterium Azospirillum brasilense with a comprehensive characterization of the formed selenium particles. As selenium is an essential trace element, but also toxic in high concentrations, its state of occurrence in nature is of major concern. Growth of the bacterium was affected by selenite (1-5mM) only, observable as a prolonged growth lag-phase of 3days. Subsequently, selenite reduction occurred under aerobic conditions resulting in extracellularly formed insoluble Se0 particles. Complementary studies by microscopic and spectroscopic techniques revealed the particles to be homogeneous and stable Se8-nSn structured spheres with an average size of 400nm and highly negative surface charge of -18mV in the neutral pH range. As this is the first study showing Azospirillum brasilense being able to biotransform selenite to selenium particles containing a certain amount of sulfur, even if environmental waters supplemented with selenite were used, they may significantly contribute to the biogeochemical cycling of both elements in soil as well as to their soil-plant transfer. Therefore, microbial biotransformation of selenite under certain circumstances may be used for various bio-remediation and bio-technological applications.
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Affiliation(s)
- M Vogel
- Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Resource Ecology, Bautzner Landstrasse 400, D-01328 Dresden, Germany; Helmholtz-Zentrum Dresden-Rossendorf e.V., Helmholtz Institute Freiberg for Resource Technology, Bautzner Landstrasse 400, D-01328 Dresden, Germany.
| | - S Fischer
- Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Resource Ecology, Bautzner Landstrasse 400, D-01328 Dresden, Germany.
| | - A Maffert
- Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Resource Ecology, Bautzner Landstrasse 400, D-01328 Dresden, Germany; Helmholtz-Zentrum Dresden-Rossendorf e.V., Helmholtz Institute Freiberg for Resource Technology, Bautzner Landstrasse 400, D-01328 Dresden, Germany.
| | - R Hübner
- Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion-Beam Physics and Materials Research, Bautzner Landstrasse 400, D-01328 Dresden, Germany.
| | - A C Scheinost
- Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Resource Ecology, Bautzner Landstrasse 400, D-01328 Dresden, Germany; European Synchrotron Radiation Facility, Rossendorf Beamline, BP 220, F-38043 Grenoble, France.
| | - C Franzen
- Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Resource Ecology, Bautzner Landstrasse 400, D-01328 Dresden, Germany.
| | - R Steudtner
- Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Resource Ecology, Bautzner Landstrasse 400, D-01328 Dresden, Germany.
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He H, Zhen Y, Mi T, Fu L, Yu Z. Ammonia-Oxidizing Archaea and Bacteria Differentially Contribute to Ammonia Oxidation in Sediments from Adjacent Waters of Rushan Bay, China. Front Microbiol 2018; 9:116. [PMID: 29456526 PMCID: PMC5801408 DOI: 10.3389/fmicb.2018.00116] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 01/18/2018] [Indexed: 11/20/2022] Open
Abstract
Ammonia oxidation plays a significant role in the nitrogen cycle in marine sediments. Ammonia-oxidizing archaea (AOA) and bacteria (AOB) are the key contributors to ammonia oxidation, and their relative contribution to this process is one of the most important issues related to the nitrogen cycle in the ocean. In this study, the differential contributions of AOA and AOB to ammonia oxidation in surface sediments from adjacent waters of Rushan Bay were studied based on the ammonia monooxygenase (amoA) gene. Molecular biology techniques were used to analyze ammonia oxidizers’ community characteristics, and potential nitrification incubation was applied to understand the ammonia oxidizers’ community activity. The objective was to determine the community structure and activity of AOA and AOB in surface sediments from adjacent waters of Rushan Bay and to discuss the different contributions of AOA and AOB to ammonia oxidation during summer and winter seasons in the studied area. Pyrosequencing analysis revealed that the diversity of AOA was higher than that of AOB. The majority of AOA and AOB clustered into Nitrosopumilus and Nitrosospira, respectively, indicating that the Nitrosopumilus group and Nitrosospira groups may be more adaptable in studied sediments. The AOA community was closely correlated to temperature, salinity and ammonium concentration, whereas the AOB community showed a stronger correlation with temperature, chlorophyll-a content (chla) and nitrite concentration. qPCR results showed that both the abundance and the transcript abundance of AOA was consistently greater than that of AOB. AOA and AOB differentially contributed to ammonia oxidation in different seasons. AOB occupied the dominant position in mediating ammonia oxidation during summer, while AOA might play a dominant role in ammonia oxidation during winter.
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Affiliation(s)
- Hui He
- College of Marine Life Science, Ocean University of China, Qingdao, China.,Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Key Laboratory of Marine Environment and Ecology, Ministry of Education, Qingdao, China
| | - Yu Zhen
- Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Key Laboratory of Marine Environment and Ecology, Ministry of Education, Qingdao, China.,College of Environmental Science and Engineering, Ocean University of China, Qingdao, China
| | - Tiezhu Mi
- Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Key Laboratory of Marine Environment and Ecology, Ministry of Education, Qingdao, China.,College of Environmental Science and Engineering, Ocean University of China, Qingdao, China
| | - Lulu Fu
- College of Marine Life Science, Ocean University of China, Qingdao, China.,Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Key Laboratory of Marine Environment and Ecology, Ministry of Education, Qingdao, China
| | - Zhigang Yu
- Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.,Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Qingdao, China
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Garousi F. The essentiality of selenium for humans, animals, and plants, and the role of selenium in plant metabolism and physiology. ACTA ACUST UNITED AC 2017. [DOI: 10.1515/ausal-2017-0005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
After its discovery, selenium was most noted for its harmful effects. Selenium was the first element identified to occur in native vegetation at levels toxic to animals. Poisoning of animals can occur through consumption of plants containing toxic levels of selenium. Livestock consuming excessive amounts of selenized forages are afflicted with “alkali disease” and “blind staggers”. Typical symptoms of these diseases include loss of hair, deformed hooves, blindness, colic, diarrhoea, lethargy, increased heart and respiration rates, and eventually death. On the other hand, selenium deficiency in animal feeds can cause “white muscle disease”, a degenerative disease of the cardiac and skeletal muscles. In this regard, this review paper attempts to summarize the essentiality of selenium for humans, animals, and plants and the role of selenium in plant metabolism and physiology.
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Affiliation(s)
- F. Garousi
- University of Debrecen , Faculty of Agricultural and Food Sciences and Environmental Management, Institute of Food Technology , HU-4032 Debrecen , Böszörményi út 138., Hungary
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29
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Lusa M, Knuutinen J, Bomberg M. Uptake and reduction of Se(IV) in two heterotrophic aerobic Pseudomonads strains isolated from boreal bog environment. AIMS Microbiol 2017; 3:798-814. [PMID: 31294190 PMCID: PMC6604954 DOI: 10.3934/microbiol.2017.4.798] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Accepted: 09/28/2017] [Indexed: 12/02/2022] Open
Abstract
Selenite (Se(IV), SeO32−) uptake and the effect of selenite supplement on protein synthesis was investigated in two Pseudomonas sp. strains isolated from a boreal bog. These aerobic bacteria efficiently reduced Se(IV) with intracellular reduced Se0 observed in the cytoplasm under dark aerobic conditions. The proteome analysis of Se(IV) supplement and temperature responses by SDS-PAGE gel electrophoresis showed variations in the protein expression on the 40–60 kDa regions following these stress factors, probably through enzymes associated to oxidative stress or temperature adaptation. NO3−/NO2−/SO42− addition enhanced Se(IV) uptake in both bacteria, but Se(IV) uptake sustained also under sulphur and nitrogen starvation. Our findings suggest two different transport mechanisms for Se(IV) uptake in these Pseudomonas sp. strains; a low affinity transport system up-regulated by NO3−/NO2−/SO42− and a distinct Se(IV)O32− regulated transport system. Following transport, Se(IV) is reduced in the cytoplasm, forming Se0 granules, visible in TEM and verified using EDX.
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Affiliation(s)
- Merja Lusa
- Department of Chemistry, Radiochemistry, University of Helsinki, P.O. Box 55, 00014 Helsinki, Finland
| | - Jenna Knuutinen
- Department of Chemistry, Radiochemistry, University of Helsinki, P.O. Box 55, 00014 Helsinki, Finland
| | - Malin Bomberg
- VTT Technical Research Centre of Finland, Espoo, Finland
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30
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Tsuji K, Asayama T, Shiraki N, Inoue S, Okuda E, Hayashi C, Nishida K, Hasegawa H, Harada E. Mn accumulation in a submerged plant Egeria densa (Hydrocharitaceae) is mediated by epiphytic bacteria. PLANT, CELL & ENVIRONMENT 2017; 40:1163-1173. [PMID: 28098343 DOI: 10.1111/pce.12910] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2016] [Revised: 12/24/2016] [Accepted: 01/04/2017] [Indexed: 06/06/2023]
Abstract
Many aquatic plants act as biosorbents, removing and recovering metals from the environment. To assess the biosorbent activity of Egeria densa, a submerged freshwater macrophyte, plants were collected monthly from a circular drainage area in Lake Biwa basin and the Mn concentrations of the plants were analysed. Mn concentrations in these plants were generally above those of terrestrial hyperaccumulators, and were markedly higher in spring and summer than in autumn. Mn concentrations were much lower in plants incubated in hydroponic medium at various pH levels with and without Mn supplementation than in field-collected plants. The precipitation of Mn oxides on the leaves was determined by variable pressure scanning electron microscopy-energy dispersive X-ray analysis and Leucoberbelin blue staining. Several strains of epiphytic bacteria were isolated from the field-collected E. densa plants, with many of these strains, including those of the genera Acidovorax, Comamonas, Pseudomonas and Rhizobium, found to have Mn-oxidizing activity. High Mn concentrations in E. densa were mediated by the production of biogenic Mn oxide in biofilms on leaf surfaces. These findings provide new insights into plant epidermal bacterial flora that affect metal accumulation in plants and suggest that these aquatic plants may have use in Mn phytomining.
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Affiliation(s)
- Kousuke Tsuji
- Graduate School of Environmental Science, The University of Shiga Prefecture, 2500 Hassaka-cho, Hikone, Shiga, 522-8533, Japan
| | - Takuma Asayama
- Graduate School of Environmental Science, The University of Shiga Prefecture, 2500 Hassaka-cho, Hikone, Shiga, 522-8533, Japan
| | - Nozomi Shiraki
- School of Environmental Science, The University of Shiga Prefecture, 2500 Hassaka-cho, Hikone, Shiga, 522-8533, Japan
| | - Shota Inoue
- School of Environmental Science, The University of Shiga Prefecture, 2500 Hassaka-cho, Hikone, Shiga, 522-8533, Japan
| | - Erina Okuda
- School of Environmental Science, The University of Shiga Prefecture, 2500 Hassaka-cho, Hikone, Shiga, 522-8533, Japan
| | - Chizuru Hayashi
- School of Environmental Science, The University of Shiga Prefecture, 2500 Hassaka-cho, Hikone, Shiga, 522-8533, Japan
| | - Kazuma Nishida
- School of Environmental Science, The University of Shiga Prefecture, 2500 Hassaka-cho, Hikone, Shiga, 522-8533, Japan
| | - Hiroshi Hasegawa
- School of Environmental Science, The University of Shiga Prefecture, 2500 Hassaka-cho, Hikone, Shiga, 522-8533, Japan
| | - Emiko Harada
- School of Environmental Science, The University of Shiga Prefecture, 2500 Hassaka-cho, Hikone, Shiga, 522-8533, Japan
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Wiesner-Reinhold M, Schreiner M, Baldermann S, Schwarz D, Hanschen FS, Kipp AP, Rowan DD, Bentley-Hewitt KL, McKenzie MJ. Mechanisms of Selenium Enrichment and Measurement in Brassicaceous Vegetables, and Their Application to Human Health. FRONTIERS IN PLANT SCIENCE 2017; 8:1365. [PMID: 28824693 PMCID: PMC5540907 DOI: 10.3389/fpls.2017.01365] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 07/21/2017] [Indexed: 05/04/2023]
Abstract
Selenium (Se) is an essential micronutrient for human health. Se deficiency affects hundreds of millions of people worldwide, particularly in developing countries, and there is increasing awareness that suboptimal supply of Se can also negatively affect human health. Selenium enters the diet primarily through the ingestion of plant and animal products. Although, plants are not dependent on Se they take it up from the soil through the sulphur (S) uptake and assimilation pathways. Therefore, geographic differences in the availability of soil Se and agricultural practices have a profound influence on the Se content of many foods, and there are increasing efforts to biofortify crop plants with Se. Plants from the Brassicales are of particular interest as they accumulate and synthesize Se into forms with additional health benefits, such as methylselenocysteine (MeSeCys). The Brassicaceae are also well-known to produce the glucosinolates; S-containing compounds with demonstrated human health value. Furthermore, the recent discovery of the selenoglucosinolates in the Brassicaceae raises questions regarding their potential bioefficacy. In this review we focus on Se uptake and metabolism in the Brassicaceae in the context of human health, particularly cancer prevention and immunity. We investigate the close relationship between Se and S metabolism in this plant family, with particular emphasis on the selenoglucosinolates, and consider the methodologies available for identifying and quantifying further novel Se-containing compounds in plants. Finally, we summarize the research of multiple groups investigating biofortification of the Brassicaceae and discuss which approaches might be most successful for supplying Se deficient populations in the future.
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Affiliation(s)
- Melanie Wiesner-Reinhold
- Plant Quality and Food Security, Leibniz Institute of Vegetable and Ornamental CropsGrossbeeren, Germany
- *Correspondence: Melanie Wiesner-Reinhold
| | - Monika Schreiner
- Plant Quality and Food Security, Leibniz Institute of Vegetable and Ornamental CropsGrossbeeren, Germany
| | - Susanne Baldermann
- Plant Quality and Food Security, Leibniz Institute of Vegetable and Ornamental CropsGrossbeeren, Germany
- Food Chemistry, Institute of Nutritional Science, University of PotsdamNuthethal, Germany
| | - Dietmar Schwarz
- Functional Plant Biology, Leibniz Institute of Vegetable and Ornamental CropGrossbeeren, Germany
| | - Franziska S. Hanschen
- Plant Quality and Food Security, Leibniz Institute of Vegetable and Ornamental CropsGrossbeeren, Germany
| | - Anna P. Kipp
- Department of Molecular Nutritional Physiology, Institute of Nutrition, Friedrich Schiller University JenaJena, Germany
| | - Daryl D. Rowan
- Food Innovation, The New Zealand Institute for Plant & Food Research LimitedPalmerston North, New Zealand
| | - Kerry L. Bentley-Hewitt
- Food Innovation, The New Zealand Institute for Plant & Food Research LimitedPalmerston North, New Zealand
| | - Marian J. McKenzie
- Food Innovation, The New Zealand Institute for Plant & Food Research LimitedPalmerston North, New Zealand
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Aung HP, Mensah AD, Aye YS, Djedidi S, Oikawa Y, Yokoyama T, Suzuki S, Dorothea Bellingrath-Kimura S. Transfer of radiocesium from rhizosphere soil to four cruciferous vegetables in association with a Bacillus pumilus strain and root exudation. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2016; 164:209-219. [PMID: 27517724 DOI: 10.1016/j.jenvrad.2016.07.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2016] [Revised: 07/03/2016] [Accepted: 07/05/2016] [Indexed: 06/06/2023]
Abstract
This study was carried out to assess the effect of Bacillus pumilus on the roots of four cruciferous vegetables with different root structures in regard to enhancement of 137Cs bioavailability in contaminated rhizosphere soil. Results revealed that B. pumilus inoculation did not enhance the plant biomass of vegetables, although it increased root volume and root surface areas of all vegetables except turnip. The pH changes due to rhizosphere acidification by B. pumilus inoculation and root exudation did not affect the bioavailability of 137Cs. However, concentrations of 137Cs in plant tissues and soil-to-plant transfer values increased as a result of the larger root volume and root surface area of vegetables due to inoculation. Moreover, leafy vegetables, which possessed larger root volume and root surface areas, had a higher 137Cs transfer value than root vegetables.
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Affiliation(s)
- Han Phyo Aung
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
| | - Akwasi Dwira Mensah
- Department of International Environmental and Agricultural Science, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
| | - Yi Swe Aye
- Department of International Environmental and Agricultural Science, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
| | - Salem Djedidi
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
| | - Yosei Oikawa
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
| | - Tadashi Yokoyama
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
| | - Sohzoh Suzuki
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
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Graziani NS, Salazar MJ, Pignata ML, Rodriguez JH. Assessment of the root system of Brassica juncea (L.) czern. and Bidens pilosa L. exposed to lead polluted soils using rhizobox systems. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2016; 18:235-244. [PMID: 26292209 DOI: 10.1080/15226514.2015.1078770] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The purpose of this study was to compare the behavior of the root system of one of the most frequently cited species in phytoremediation Indian mustard [Brassica juncea (L.) Czern.] and a representative perennial herb (Bidens pilosa L.) native of Argentina, for different concentrations of lead in soils through chemical and visualization techniques of the rhizosphere. Lead polluted soils from the vicinity of a lead recycling plant in the locality of Bouwer, were used in juxtaposed rhizobox systems planted with seedlings of B. juncea and B. pilosa with homogeneous and heterogeneous soil treatments. Root development, pH changes in the rhizosphere, dry weight biomass, lead content of root and aerial parts and potential extraction of lead by rhizosphere exudates were determined. In both species lead was mainly accumulated in roots. However, although B. juncea accumulated more lead than B. pilosa at elevated concentrations in soils, the latter achieved greater root and aerial development. No changes in the pH of the rhizosphere associated to lead were observed, despite different extractive potentials of lead in the exudates of the species analyzed. Our results indicated that Indian mustard did not behave as a hyperaccumulator in the conditions of the present study.
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Affiliation(s)
- Natalia Soledad Graziani
- a Multidisciplinary Institute of Plant Biology, Pollution and Bioindicator section, Faculty of Physical and Natural Sciences , National University of Córdoba , Av. Vélez Sársfield, Córdoba , Argentina
| | - María Julieta Salazar
- a Multidisciplinary Institute of Plant Biology, Pollution and Bioindicator section, Faculty of Physical and Natural Sciences , National University of Córdoba , Av. Vélez Sársfield, Córdoba , Argentina
| | - María Luisa Pignata
- a Multidisciplinary Institute of Plant Biology, Pollution and Bioindicator section, Faculty of Physical and Natural Sciences , National University of Córdoba , Av. Vélez Sársfield, Córdoba , Argentina
| | - Judith Hebelen Rodriguez
- a Multidisciplinary Institute of Plant Biology, Pollution and Bioindicator section, Faculty of Physical and Natural Sciences , National University of Córdoba , Av. Vélez Sársfield, Córdoba , Argentina
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Lusa M, Bomberg M, Aromaa H, Knuutinen J, Lehto J. The microbial impact on the sorption behaviour of selenite in an acidic, nutrient-poor boreal bog. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2015; 147:85-96. [PMID: 26048060 DOI: 10.1016/j.jenvrad.2015.05.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Revised: 05/12/2015] [Accepted: 05/13/2015] [Indexed: 06/04/2023]
Abstract
(79)Se is among the most important long lived radionuclides in spent nuclear fuel and selenite, SeO3(2-), is its typical form in intermediate redox potential. The sorption behaviour of selenite and the bacterial impact on the selenite sorption in a 7-m-deep profile of a nutrient-poor boreal bog was studied using batch sorption experiments. The batch distribution coefficient (Kd) values of selenite decreased as a function of sampling depth and highest Kd values, 6600 L/kg dry weight (DW), were observed in the surface moss and the lowest in the bottom clay at 1700 L/kg DW. The overall maximum sorption was observed at pH between 3 and 4 and the Kd values were significantly higher in unsterilized compared to sterilized samples. The removal of selenite from solution by Pseudomonas sp., Burkholderia sp., Rhodococcus sp. and Paenibacillus sp. strains isolated from the bog was affected by incubation temperature and time. In addition, the incubation of sterilized surface moss, subsurface peat and gyttja samples with added bacteria effectively removed selenite from the solution and on average 65% of selenite was removed when Pseudomonas sp. or Burkholderia sp. strains were used. Our results demonstrate the important role of bacteria for the removal of selenite from the solution phase in the bog environment, having a high organic matter content and a low pH.
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Affiliation(s)
- M Lusa
- Laboratory of Radiochemistry, Department of Chemistry, P.O. Box 55, 00014 University of Helsinki, Finland.
| | - M Bomberg
- VTT Technical Research Centre of Finland, P.O. Box 1000, 02044 VTT, Finland
| | - H Aromaa
- Laboratory of Radiochemistry, Department of Chemistry, P.O. Box 55, 00014 University of Helsinki, Finland
| | - J Knuutinen
- Laboratory of Radiochemistry, Department of Chemistry, P.O. Box 55, 00014 University of Helsinki, Finland
| | - J Lehto
- Laboratory of Radiochemistry, Department of Chemistry, P.O. Box 55, 00014 University of Helsinki, Finland
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Staicu L, Ackerson C, Cornelis P, Ye L, Berendsen R, Hunter W, Noblitt S, Henry C, Cappa J, Montenieri R, Wong A, Musilova L, Sura-de Jong M, van Hullebusch E, Lens P, Reynolds R, Pilon-Smits E. Pseudomonas moraviensis
subsp. stanleyae, a bacterial endophyte of hyperaccumulator Stanleya pinnata
, is capable of efficient selenite reduction to elemental selenium under aerobic conditions. J Appl Microbiol 2015; 119:400-10. [DOI: 10.1111/jam.12842] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 04/28/2015] [Accepted: 04/28/2015] [Indexed: 11/29/2022]
Affiliation(s)
- L.C. Staicu
- Biology Department; Colorado State University; Fort Collins CO USA
- UNESCO-IHE Institute for Water Education; Delft The Netherlands
- Université Paris-Est, Laboratoire Géomatériaux et Environnement, UPEM; Marne-la-Vallée, Cedex 2 France
| | - C.J. Ackerson
- Chemistry Department; Colorado State University; Fort Collins CO USA
| | - P. Cornelis
- VIB Department of Structural Biology; Department of Bioengineering Sciences; Research Group Microbiology; Vrije Universiteit; Brussels Belgium
| | - L. Ye
- VIB Department of Structural Biology; Department of Bioengineering Sciences; Research Group Microbiology; Vrije Universiteit; Brussels Belgium
| | - R.L. Berendsen
- Plant-Microbe Interactions; Department of Biology; Faculty of Science; Utrecht University; Utrecht The Netherlands
| | | | - S.D. Noblitt
- Chemistry Department; Colorado State University; Fort Collins CO USA
| | - C.S. Henry
- Chemistry Department; Colorado State University; Fort Collins CO USA
| | - J.J. Cappa
- UNESCO-IHE Institute for Water Education; Delft The Netherlands
| | | | - A.O. Wong
- Chemistry Department; Colorado State University; Fort Collins CO USA
| | - L. Musilova
- Biochemistry and Microbiology Department; Institute of Chemical Technology in Prague; Prague Czech Republic
| | - M. Sura-de Jong
- Biochemistry and Microbiology Department; Institute of Chemical Technology in Prague; Prague Czech Republic
| | - E.D. van Hullebusch
- Université Paris-Est, Laboratoire Géomatériaux et Environnement, UPEM; Marne-la-Vallée, Cedex 2 France
| | - P.N.L. Lens
- UNESCO-IHE Institute for Water Education; Delft The Netherlands
| | - R.J.B. Reynolds
- Biology Department; Colorado State University; Fort Collins CO USA
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El Mehdawi AF, Paschke MW, Pilon-Smits EAH. Symphyotrichum ericoides populations from seleniferous and nonseleniferous soil display striking variation in selenium accumulation. THE NEW PHYTOLOGIST 2015; 206:231-242. [PMID: 25406635 DOI: 10.1111/nph.13164] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Accepted: 10/14/2014] [Indexed: 05/07/2023]
Abstract
Symphyotrichum ericoides (Asteraceae) from naturally seleniferous habitat (Pine Ridge) was shown previously to have selenium (Se) hyperaccumulator properties in field and glasshouse studies, and to benefit from Se through protection from herbivory. To investigate whether Se hyperaccumulation is ubiquitous in S. ericoides or restricted to seleniferous soils, the S. ericoides Pine Ridge (PR) population was compared with the nearby Cloudy Pass (CP) population from nonseleniferous soil. The S. ericoidesPR and CP populations were strikingly physiologically different: in a common garden experiment, PR plants accumulated up to 40-fold higher Se concentrations than CP plants and had 10-fold higher Se : sulfur (S) ratios. Moreover, roots of S. ericoidesPR plants showed directional growth toward selenate, while CP roots did not. Growth of both accessions responded positively to Se. Each accession grew best on its own soil. Rhizosphere soil inoculum from the S. ericoidesPR population stimulated plant growth and Se accumulation in both S. ericoidesPR and S. ericoidesCP plants, on both PR and CP soils. While the S. ericoidesPR population hyperaccumulates Se, the nearby CP population does not. The capacity of S. ericoidesPR plants to hyperaccumulate Se appears to be a local phenomenon that is restricted to seleniferous soil. Mutualistic rhizosphere microbes of the S. ericoidesPR population may contribute to the hyperaccumulation phenotype.
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Affiliation(s)
- Ali F El Mehdawi
- Biology Department, Colorado State University, Fort Collins, CO, 80523, USA
| | - Mark W Paschke
- Department of Forest and Rangeland Stewardship, Colorado State University, Fort Collins, CO, 80523, USA
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Sura-de Jong M, Reynolds RJB, Richterova K, Musilova L, Staicu LC, Chocholata I, Cappa JJ, Taghavi S, van der Lelie D, Frantik T, Dolinova I, Strejcek M, Cochran AT, Lovecka P, Pilon-Smits EAH. Selenium hyperaccumulators harbor a diverse endophytic bacterial community characterized by high selenium resistance and plant growth promoting properties. FRONTIERS IN PLANT SCIENCE 2015; 6:113. [PMID: 25784919 PMCID: PMC4345804 DOI: 10.3389/fpls.2015.00113] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2014] [Accepted: 02/11/2015] [Indexed: 05/07/2023]
Abstract
Selenium (Se)-rich plants may be used to provide dietary Se to humans and livestock, and also to clean up Se-polluted soils or waters. This study focused on endophytic bacteria of plants that hyperaccumulate selenium (Se) to 0.5-1% of dry weight. Terminal restriction fragment length polymorphism (T-RFLP) analysis was used to compare the diversity of endophytic bacteria of hyperaccumulators Stanleya pinnata (Brassicaceae) and Astragalus bisulcatus (Fabaceae) with those from related non-accumulators Physaria bellii (Brassicaceae) and Medicago sativa (Fabaceae) collected on the same, seleniferous site. Hyperaccumulators and non-accumulators showed equal T-RF diversity. Parsimony analysis showed that T-RFs from individuals of the same species were more similar to each other than to those from other species, regardless of plant Se content or spatial proximity. Cultivable endophytes from hyperaccumulators S. pinnata and A. bisulcatus were further identified and characterized. The 66 bacterial morphotypes were shown by MS MALDI-TOF Biotyper analysis and 16S rRNA gene sequencing to include strains of Bacillus, Pseudomonas, Pantoea, Staphylococcus, Paenibacillus, Advenella, Arthrobacter, and Variovorax. Most isolates were highly resistant to selenate and selenite (up to 200 mM) and all could reduce selenite to red elemental Se, reduce nitrite and produce siderophores. Seven isolates were selected for plant inoculation and found to have plant growth promoting properties, both in pure culture and when co-cultivated with crop species Brassica juncea (Brassicaceae) or M. sativa. There were no effects on plant Se accumulation. We conclude that Se hyperaccumulators harbor an endophytic bacterial community in their natural seleniferous habitat that is equally diverse to that of comparable non-accumulators. The hyperaccumulator endophytes are characterized by high Se resistance, capacity to produce elemental Se and plant growth promoting properties.
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Affiliation(s)
- Martina Sura-de Jong
- Department of Biochemistry and Microbiology, University of Chemistry and Technology in PraguePrague, Czech Republic
- Life Sciences and Technology, Van Hall Larenstein University of Applied SciencesLeeuwarden, Netherlands
| | | | - Klara Richterova
- Department of Biochemistry and Microbiology, University of Chemistry and Technology in PraguePrague, Czech Republic
| | - Lucie Musilova
- Department of Biochemistry and Microbiology, University of Chemistry and Technology in PraguePrague, Czech Republic
| | - Lucian C. Staicu
- Biology Department, Colorado State UniversityFort Collins, CO, USA
| | - Iva Chocholata
- Department of Biochemistry and Microbiology, University of Chemistry and Technology in PraguePrague, Czech Republic
| | | | - Safiyh Taghavi
- FMC Corporation, Center of Excellence for Agricultural Biosolutions, Research Triangle ParkNC, USA
| | - Daniel van der Lelie
- FMC Corporation, Center of Excellence for Agricultural Biosolutions, Research Triangle ParkNC, USA
| | - Tomas Frantik
- Institute of Botany, Academy of Sciences of the Czech RepublicPruhonice, Czech Republic
| | - Iva Dolinova
- The Institute for Nanomaterials, Advanced Technology and Innovation, Technical University of LiberecLiberec, Czech Republic
| | - Michal Strejcek
- Department of Biochemistry and Microbiology, University of Chemistry and Technology in PraguePrague, Czech Republic
| | | | - Petra Lovecka
- Department of Biochemistry and Microbiology, University of Chemistry and Technology in PraguePrague, Czech Republic
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Muehe EM, Weigold P, Adaktylou IJ, Planer-Friedrich B, Kraemer U, Kappler A, Behrens S. Rhizosphere microbial community composition affects cadmium and zinc uptake by the metal-hyperaccumulating plant Arabidopsis halleri. Appl Environ Microbiol 2015; 81:2173-81. [PMID: 25595759 PMCID: PMC4345380 DOI: 10.1128/aem.03359-14] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2014] [Accepted: 01/08/2015] [Indexed: 12/07/2022] Open
Abstract
The remediation of metal-contaminated soils by phytoextraction depends on plant growth and plant metal accessibility. Soil microorganisms can affect the accumulation of metals by plants either by directly or indirectly stimulating plant growth and activity or by (im)mobilizing and/or complexing metals. Understanding the intricate interplay of metal-accumulating plants with their rhizosphere microbiome is an important step toward the application and optimization of phytoremediation. We compared the effects of a "native" and a strongly disturbed (gamma-irradiated) soil microbial communities on cadmium and zinc accumulation by the plant Arabidopsis halleri in soil microcosm experiments. A. halleri accumulated 100% more cadmium and 15% more zinc when grown on the untreated than on the gamma-irradiated soil. Gamma irradiation affected neither plant growth nor the 1 M HCl-extractable metal content of the soil. However, it strongly altered the soil microbial community composition and overall cell numbers. Pyrosequencing of 16S rRNA gene amplicons of DNA extracted from rhizosphere samples of A. halleri identified microbial taxa (Lysobacter, Streptomyces, Agromyces, Nitrospira, "Candidatus Chloracidobacterium") of higher relative sequence abundance in the rhizospheres of A. halleri plants grown on untreated than on gamma-irradiated soil, leading to hypotheses on their potential effect on plant metal uptake. However, further experimental evidence is required, and wherefore we discuss different mechanisms of interaction of A. halleri with its rhizosphere microbiome that might have directly or indirectly affected plant metal accumulation. Deciphering the complex interactions between A. halleri and individual microbial taxa will help to further develop soil metal phytoextraction as an efficient and sustainable remediation strategy.
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Affiliation(s)
- E Marie Muehe
- Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, Tuebingen, Germany
| | - Pascal Weigold
- Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, Tuebingen, Germany
| | - Irini J Adaktylou
- Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, Tuebingen, Germany
| | - Britta Planer-Friedrich
- Environmental Geochemistry, Bayreuth Center for Ecology and Environmental Research (BayCEER), University of Bayreuth, Bayreuth, Germany
| | - Ute Kraemer
- Department of Plant Physiology, Ruhr University Bochum, Bochum, Germany
| | - Andreas Kappler
- Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, Tuebingen, Germany
| | - Sebastian Behrens
- Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, Tuebingen, Germany
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El-Ramady H, Abdalla N, Alshaal T, El-Henawy A, Faizy SEDA, Shams MS, Shalaby T, Bayoumi Y, Elhawat N, Shehata S, Sztrik A, Prokisch J, Fári M, Pilon-Smits EA, Domokos-Szabolcsy É. Selenium and its Role in Higher Plants. POLLUTANTS IN BUILDINGS, WATER AND LIVING ORGANISMS 2015. [DOI: 10.1007/978-3-319-19276-5_6] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Yasin M, El-Mehdawi AF, Anwar A, Pilon-Smits EAH, Faisal M. Microbial-enhanced Selenium and Iron Biofortification of Wheat (Triticum aestivum L.)--Applications in Phytoremediation and Biofortification. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2015; 17:341-7. [PMID: 25409246 DOI: 10.1080/15226514.2014.922920] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Selenium (Se) is an essential trace element for humans and other mammals. Most dietary Se is derived from crops. To develop a Se biofortification strategy for wheat, the effect of selenate fertilization and bacterial inoculation on Se uptake and plant growth was investigated. YAM2, a bacterium with 99% similarity to Bacillus pichinotyi, showed many plant growth promoting characteristics. Inoculation with YAM2 enhanced wheat growth, both in the presence and absence of selenate: YAM2-inoculated plants showed significantly higher dry weight, shoot length and spike length compared to un-inoculated plants. Selenate also stimulated wheat growth; Un-inoculated Se-treated plants showed a significantly higher dry weight and shoot length compared to control plants without Se. Bacterial inoculation significantly enhanced Se concentration in wheat kernels (167%) and stems (252%), as well as iron (Fe) levels in kernels (70%) and stems (147%), compared to un-inoculated plants. Inoculated Se-treated plants showed a significant increase in acid phosphatase activity, which may have contributed to the enhanced growth. In conclusion; Inoculation with Bacillus sp. YAM2 is a promising Se biofortification strategy for wheat and potentially other crops.
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Affiliation(s)
- Muhammad Yasin
- a Department of Microbiology and Molecular Genetics , University of the Punjab , Quaid-e-Azam Campus, Lahore , Pakistan
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Sharma S, Singh B, Manchanda VK. Phytoremediation: role of terrestrial plants and aquatic macrophytes in the remediation of radionuclides and heavy metal contaminated soil and water. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:946-62. [PMID: 25277712 DOI: 10.1007/s11356-014-3635-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2014] [Accepted: 09/19/2014] [Indexed: 05/20/2023]
Abstract
Nuclear power reactors are operating in 31 countries around the world. Along with reactor operations, activities like mining, fuel fabrication, fuel reprocessing and military operations are the major contributors to the nuclear waste. The presence of a large number of fission products along with multiple oxidation state long-lived radionuclides such as neptunium ((237)Np), plutonium ((239)Pu), americium ((241/243)Am) and curium ((245)Cm) make the waste streams a potential radiological threat to the environment. Commonly high concentrations of cesium ((137)Cs) and strontium ((90)Sr) are found in a nuclear waste. These radionuclides are capable enough to produce potential health threat due to their long half-lives and effortless translocation into the human body. Besides the radionuclides, heavy metal contamination is also a serious issue. Heavy metals occur naturally in the earth crust and in low concentration, are also essential for the metabolism of living beings. Bioaccumulation of these heavy metals causes hazardous effects. These pollutants enter the human body directly via contaminated drinking water or through the food chain. This issue has drawn the attention of scientists throughout the world to device eco-friendly treatments to remediate the soil and water resources. Various physical and chemical treatments are being applied to clean the waste, but these techniques are quite expensive, complicated and comprise various side effects. One of the promising techniques, which has been pursued vigorously to overcome these demerits, is phytoremediation. The process is very effective, eco-friendly, easy and affordable. This technique utilizes the plants and its associated microbes to decontaminate the low and moderately contaminated sites efficiently. Many plant species are successfully used for remediation of contaminated soil and water systems. Remediation of these systems turns into a serious problem due to various anthropogenic activities that have significantly raised the amount of heavy metals and radionuclides in it. Also, these activities are continuously increasing the area of the contaminated sites. In this context, an attempt has been made to review different modes of the phytoremediation and various terrestrial and aquatic plants which are being used to remediate the heavy metals and radionuclide-contaminated soil and aquatic systems. Natural and synthetic enhancers, those hasten the process of metal adsorption/absorption by plants, are also discussed. The article includes 216 references.
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Affiliation(s)
- Sunita Sharma
- Natural Plant Products Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, 176 061, Himachal Pradesh, India
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Characterization of a selenium-tolerant rhizosphere strain from a novel Se-hyperaccumulating plant Cardamine hupingshanesis. ScientificWorldJournal 2014; 2014:108562. [PMID: 25478582 PMCID: PMC4247970 DOI: 10.1155/2014/108562] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 10/04/2014] [Accepted: 10/05/2014] [Indexed: 11/17/2022] Open
Abstract
A novel selenium- (Se-) hyperaccumulating plant, Cardamine hupingshanesis, accumulating Se as a form of SeCys2, was discovered in Enshi, Hubei, China, which could not be explained by present selenocysteine methyltransferase (SMT) theory. However, it is interesting to investigate if rhizosphere bacteria play some roles during SeCys2 accumulation. Here, one Se-tolerant rhizosphere strain, Microbacterium oxydans, was isolated from C. hupingshanesis. Phylogenetic analysis and 16S rRNA gene sequences determined the strain as a kind of Gram positive bacillus and belonged to the family Brevibacterium frigoritolerans. Furthermore, Se tolerance test indicated the strain could grow in extreme high Se level of 15.0 mg Se L(-1). When exposed to 1.5 mg Se L(-1), SeCys2 was the predominant Se species in the bacteria, consistent with the Se species in C. hupingshanesis. This coincidence might reveal that this strain played some positive effect in SeCys2 accumulation of C. hupingshanesis. Moreover, when exposed to 1.5 mg Se L(-1) or 15.0 mg Se L(-1), As absorption diminished in the logarithmic phase. In contrast, As absorption increased when exposed to 7.5 mg Se L(-1), indicating As metabolism processes could be affected by Se on this strain. The present study provided a sight on the role of rhizosphere bacteria during Se accumulation for Se-hyperaccumulating plant.
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Liu W, Yang C, Shi S, Shu W. Effects of plant growth-promoting bacteria isolated from copper tailings on plants in sterilized and non-sterilized tailings. CHEMOSPHERE 2014; 97:47-53. [PMID: 24289981 DOI: 10.1016/j.chemosphere.2013.10.089] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2013] [Revised: 10/31/2013] [Accepted: 10/31/2013] [Indexed: 05/12/2023]
Abstract
Ten strains of Cu-tolerant bacteria with potential plant growth-promoting ability were isolated by selecting strains with the ability to use 1-aminocyclopropane-1-carboxylate as a sole nitrogen source (designated ACC-B) or fix nitrogen (designated FLN-B) originating from the rhizosphere of plants growing on copper tailings. All 10 strains proved to have intrinsic ability to produce indole acetic acid and siderophores, and most of them could mobilize insoluble phosphate. In addition, a greenhouse study showed that ACC-B, FLN-B and a mixture of both had similar, potent ability to stimulate growth of Pennisetum purpureum, Medicago sativa and Oenothera erythrosepala plants grown on sterilized tailings. For instance, above-ground biomass of P. purpureum was 278-357% greater after 60d growth on sterilized tailings in their presence. They could also significantly promote the growth of the plants grown on non-sterilized tailings, though the growth-promoting effects were much weaker. So, strategies for using of the plant growth-promoting bacteria in the practice of phytoremediation deserve further studies to get higher growth-promoting efficiency.
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Affiliation(s)
- Weiqiu Liu
- Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China.
| | - Chao Yang
- Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China.
| | - Si Shi
- College of Life Science & Technology, Southwest University for Nationalities, Chengdu 610041, China.
| | - Wensheng Shu
- Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China.
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Lindblom SD, Fakra SC, Landon J, Schulz P, Tracy B, Pilon-Smits EAH. Inoculation of selenium hyperaccumulator Stanleya pinnata and related non-accumulator Stanleya elata with hyperaccumulator rhizosphere fungi--investigation of effects on Se accumulation and speciation. PHYSIOLOGIA PLANTARUM 2014; 150:107-18. [PMID: 24032473 DOI: 10.1111/ppl.12094] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Accepted: 07/21/2013] [Indexed: 05/08/2023]
Abstract
Little is known about how fungi affect elemental accumulation in hyperaccumulators (HAs). Here, two rhizosphere fungi from selenium (Se) HA Stanleya pinnata, Alternaria seleniiphila (A1) and Aspergillus leporis (AS117), were used to inoculate S. pinnata and related non-HA Stanleya elata. Growth and Se and sulfur (S) accumulation were analyzed. Furthermore, X-ray microprobe analysis was used to investigate elemental distribution and speciation. Growth of S. pinnata was not affected by inoculation or by Se. Stanleya elata growth was negatively affected by AS117 and by Se, but combination of both did not reduce growth. Selenium translocation was reduced in inoculated S. pinnata, and inoculation reduced S translocation in both species. Root Se distribution and speciation were not affected by inoculation in either species; both species accumulated mainly (90%) organic Se. Sulfur, in contrast, was present equally in organic and inorganic forms in S. pinnata roots. Thus, these rhizosphere fungi can affect growth and Se and/or S accumulation, depending on host species. They generally enhanced root accumulation and reduced translocation. These effects cannot be attributed to altered plant Se speciation but may involve altered rhizosphere speciation, as these fungi are known to produce elemental Se. Reduced Se translocation may be useful in applications where toxicity to herbivores and movement of Se into the food chain is a concern. The finding that fungal inoculation can enhance root Se accumulation may be useful in Se biofortification or phytoremediation using root crop species.
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Community dynamics and activity of ammonia-oxidizing prokaryotes in intertidal sediments of the Yangtze estuary. Appl Environ Microbiol 2013; 80:408-19. [PMID: 24185847 DOI: 10.1128/aem.03035-13] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Diversity, abundance, and activity of ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA) were investigated using the ammonia monooxygenase α subunit (amoA) in the intertidal sediments of the Yangtze Estuary. Generally, AOB had a lower diversity of amoA genes than did AOA in this study. Clone library analysis revealed great spatial variations in both AOB and AOA communities along the estuary. The UniFrac distance matrix showed that all the AOB communities and 6 out of 7 AOA communities in the Yangtze Estuary were statistically indistinguishable between summer and winter. The studied AOB and AOA community structures were observed to correlate with environmental parameters, of which salinity, pH, ammonium, total phosphorus, and organic carbon had significant correlations with the composition and distribution of both communities. Also, the AOA communities were significantly correlated with sediment clay content. Quantitative PCR (qPCR) results indicated that the abundance of AOB amoA genes was greater than that of AOA amoA genes in 10 of the 14 samples analyzed in this study. Potential nitrification rates were significantly greater in summer than in winter and had a significant negative correlation with salinity. In addition, potential nitrification rates were correlated strongly only with archaeal amoA gene abundance and not with bacterial amoA gene abundance. However, no significant differences were observed between rates measured with and without ampicillin (AOB inhibitor). These results implied that archaea might play a more important role in mediating the oxidation of ammonia to nitrite in the Yangtze estuarine sediments.
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Sampaio da Silva D, Lucotte M, Paquet S, Brux G, Lemire M. Inverse mercury and selenium concentration patterns between herbivorous and piscivorous fish in the Tapajos River, Brazilian Amazon. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2013; 97:17-25. [PMID: 23921221 DOI: 10.1016/j.ecoenv.2013.06.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2012] [Revised: 06/23/2013] [Accepted: 06/24/2013] [Indexed: 06/02/2023]
Abstract
We evaluated the levels of selenium and mercury in five fish species commonly eaten by local populations of the Brazilian Amazon. Fish specimens were sampled in two lotic and three lentic areas at two different phases of the hydrological cycle. Analyses of Carbon and Nitrogen stable isotopes allowed us to confirm the trophic levels of the fish species (one herbivorous, two omnivorous and two piscivorous) and verify that these levels remained unchanged with the habitats and the season. The levels of selenium and mercury in fish varied from 50ng/g to 1006ng/g and from 17ng/g to 3502ng/g respectively. For both seasons, fish from lotic ecosystems presented higher selenium concentrations. An inverse pattern was observed between selenium and mercury concentrations within the trophic chain, and this in both seasons. Indeed, the highest mean concentrations of selenium and lowest mean concentrations of mercury were measured in the herbivorous species and the opposite in the piscivorous species. Our results unequivocally demonstrate that local riverside populations will maximize the selenium health benefits of eating fish while minimizing their risk of being chronically exposed to mercury by preferentially consuming herbivorous species and to some extent omnivorous species, while avoiding piscivorous species.
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Sessitsch A, Kuffner M, Kidd P, Vangronsveld J, Wenzel WW, Fallmann K, Puschenreiter M. The role of plant-associated bacteria in the mobilization and phytoextraction of trace elements in contaminated soils. SOIL BIOLOGY & BIOCHEMISTRY 2013; 60:182-194. [PMID: 23645938 PMCID: PMC3618436 DOI: 10.1016/j.soilbio.2013.01.012] [Citation(s) in RCA: 309] [Impact Index Per Article: 28.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Revised: 01/04/2013] [Accepted: 01/13/2013] [Indexed: 05/04/2023]
Abstract
Phytoextraction makes use of trace element-accumulating plants that concentrate the pollutants in their tissues. Pollutants can be then removed by harvesting plants. The success of phytoextraction depends on trace element availability to the roots and the ability of the plant to intercept, take up, and accumulate trace elements in shoots. Current phytoextraction practises either employ hyperaccumulators or fast-growing high biomass plants; the phytoextraction process may be enhanced by soil amendments that increase trace element availability in the soil. This review will focus on the role of plant-associated bacteria to enhance trace element availability in the rhizosphere. We report on the kind of bacteria typically found in association with trace element - tolerating or - accumulating plants and discuss how they can contribute to improve trace element uptake by plants and thus the efficiency and rate of phytoextraction. This enhanced trace element uptake can be attributed to a microbial modification of the absorptive properties of the roots such as increasing the root length and surface area and numbers of root hairs, or by increasing the plant availability of trace elements in the rhizosphere and the subsequent translocation to shoots via beneficial effects on plant growth, trace element complexation and alleviation of phytotoxicity. An analysis of data from literature shows that effects of bacterial inoculation on phytoextraction efficiency are currently inconsistent. Some key processes in plant-bacteria interactions and colonization by inoculated strains still need to be unravelled more in detail to allow full-scale application of bacteria assisted phytoremediation of trace element contaminated soils.
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Affiliation(s)
- Angela Sessitsch
- AIT Austrian Institute of Technology GmbH, Bioresources Unit, A-3430 Tulln, Austria
| | - Melanie Kuffner
- AIT Austrian Institute of Technology GmbH, Bioresources Unit, A-3430 Tulln, Austria
| | - Petra Kidd
- Instituto de Investigaciones Agrobiológicas de Galicia (IIAG), CSIC, Apdo. 122, 15780 Santiago de Compostela, Spain
| | - Jaco Vangronsveld
- Hasselt University, Centre for Environmental Sciences, B-3590 Diepenbeek, Belgium
| | - Walter W. Wenzel
- University of Natural Resources and Life Sciences Vienna, Department of Forest and Soil Sciences, A-3430 Tulln, Austria
| | - Katharina Fallmann
- AIT Austrian Institute of Technology GmbH, Bioresources Unit, A-3430 Tulln, Austria
- University of Natural Resources and Life Sciences Vienna, Department of Forest and Soil Sciences, A-3430 Tulln, Austria
| | - Markus Puschenreiter
- University of Natural Resources and Life Sciences Vienna, Department of Forest and Soil Sciences, A-3430 Tulln, Austria
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