1
|
Chen Y, Li Y, Luo G, Luo C, Xiao Z, Lu Y, Xiang Z, Hou Z, Xiao Q, Zhou Y, Tang Q. Gene identification, expression analysis, and molecular docking of SAT and OASTL in the metabolic pathway of selenium in Cardamine hupingshanensis. PLANT CELL REPORTS 2024; 43:148. [PMID: 38775862 PMCID: PMC11111505 DOI: 10.1007/s00299-024-03227-6] [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: 02/21/2024] [Accepted: 05/02/2024] [Indexed: 05/25/2024]
Abstract
KEY MESSAGE Identification of selenium stress-responsive expression and molecular docking of serine acetyltransferase (SAT) and O-acetyl serine (thiol) lyase (OASTL) in Cardamine hupingshanensis. A complex coupled with serine acetyltransferase (SAT) and O-acetyl serine (thiol) lyase (OASTL) is the key enzyme that catalyzes selenocysteine (Sec) synthesis in plants. The functions of SAT and OASTL genes were identified in some plants, but it is still unclear whether SAT and OASTL are involved in the selenium metabolic pathway in Cardamine hupingshanensis. In this study, genome-wide identification and comparative analysis of ChSATs and ChOASTLs were performed. The eight ChSAT genes were divided into three branches, and the thirteen ChOASTL genes were divided into four branches by phylogenetic analysis and sequence alignment, indicating the evolutionary conservation of the gene structure and its association with other plant species. qRT-PCR analysis showed that the ChSAT and ChOASTL genes were differentially expressed in different tissues under various selenium levels, suggesting their important roles in Sec synthesis. The ChSAT1;2 and ChOASTLA1;2 were silenced by the VIGS system to investigate their involvement in selenium metabolites in C. hupingshanensis. The findings contribute to understanding the gene functions of ChSATs and ChOASTLs in the selenium stress and provide a reference for further exploration of the selenium metabolic pathway in plants.
Collapse
Affiliation(s)
- Yushan Chen
- Hubei Key Laboratory of Biological Resources Protection and Utilization, Hubei Minzu University, Enshi, 44500, China
- Hubei Key Laboratory of Selenium Resource Research and Biological Application, Hubei Minzu University, Enshi, 44500, China
- College of Biological and Food Engineering, Hubei Minzu University, Enshi, 44500, China
| | - Yao Li
- College of Biological and Food Engineering, Hubei Minzu University, Enshi, 44500, China
| | - Guoqiang Luo
- College of Biological and Food Engineering, Hubei Minzu University, Enshi, 44500, China
| | - Cihang Luo
- College of Biological and Food Engineering, Hubei Minzu University, Enshi, 44500, China
| | - Zhijing Xiao
- College of Biological and Food Engineering, Hubei Minzu University, Enshi, 44500, China
| | - Yanke Lu
- Hubei Key Laboratory of Selenium Resource Research and Biological Application, Hubei Minzu University, Enshi, 44500, China
- College of Biological and Food Engineering, Hubei Minzu University, Enshi, 44500, China
| | - Zhixin Xiang
- Hubei Key Laboratory of Selenium Resource Research and Biological Application, Hubei Minzu University, Enshi, 44500, China
- College of Biological and Food Engineering, Hubei Minzu University, Enshi, 44500, China
| | - Zhi Hou
- Hubei Key Laboratory of Selenium Resource Research and Biological Application, Hubei Minzu University, Enshi, 44500, China
- College of Biological and Food Engineering, Hubei Minzu University, Enshi, 44500, China
| | - Qiang Xiao
- Hubei Key Laboratory of Biological Resources Protection and Utilization, Hubei Minzu University, Enshi, 44500, China
- College of Forestry and Horticulture, Hubei Minzu University, Enshi, 44500, China
| | - Yifeng Zhou
- Hubei Key Laboratory of Biological Resources Protection and Utilization, Hubei Minzu University, Enshi, 44500, China.
- Hubei Key Laboratory of Selenium Resource Research and Biological Application, Hubei Minzu University, Enshi, 44500, China.
- College of Biological and Food Engineering, Hubei Minzu University, Enshi, 44500, China.
| | - Qiaoyu Tang
- Hubei Key Laboratory of Biological Resources Protection and Utilization, Hubei Minzu University, Enshi, 44500, China.
- College of Forestry and Horticulture, Hubei Minzu University, Enshi, 44500, China.
| |
Collapse
|
2
|
Zhang S, Liu Y, Wang H, Xu Z, Peng J, Xu Q, Li K, Wang H, Guo Y. Achromobacter seleniivolatilans sp. nov. and Buttiauxella selenatireducens sp. nov., isolated from the rhizosphere of selenium hyperaccumulator Cardamine hupingshanesis. Int J Syst Evol Microbiol 2024; 74. [PMID: 38619980 DOI: 10.1099/ijsem.0.006334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2024] Open
Abstract
Two Gram-stain-negative bacterial strains, R39T and R73T, were isolated from the rhizosphere soil of the selenium hyperaccumulator Cardamine hupingshanesis in China. Strain R39T transformed selenite into elemental and volatile selenium, whereas strain R73T transformed both selenate and selenite into elemental selenium. Phylogenetic and phylogenomic analyses indicated that strain R39T belonged to the genus Achromobacter, while strain R73T belonged to the genus Buttiauxella. Strain R39T (genome size, 6.68 Mb; G+C content, 61.6 mol%) showed the closest relationship to Achromobacter marplatensis LMG 26219T and Achromobacter kerstersii LMG 3441T, with average nucleotide identity (ANI) values of 83.6 and 83.4 %, respectively. Strain R73T (genome size, 5.22 Mb; G+C content, 50.3 mol%) was most closely related to Buttiauxella ferragutiae ATCC 51602T with an ANI value of 86.4 %. Furthermore, strain A111 from the GenBank database was found to cluster with strain R73T within the genus Buttiauxella through phylogenomic analyses. The ANI and digital DNA-DNA hybridization values between strains R73T and A111 were 97.5 and 80.0% respectively, indicating that they belong to the same species. Phenotypic characteristics also differentiated strain R39T and strain R73T from their closely related species. Based on the polyphasic analyses, strain R39T and strain R73T represent novel species of the genera Achromobacter and Buttiauxella, respectively, for which the names Achromobacter seleniivolatilans sp. nov. (type strain R39T=GDMCC 1.3843T=JCM 36009T) and Buttiauxella selenatireducens sp. nov. (type strain R73T=GDMCC 1.3636T=JCM 35850T) are proposed.
Collapse
Affiliation(s)
- Sasa Zhang
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, PR China
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, PR China
| | - Yi Liu
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, PR China
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, PR China
| | - Hao Wang
- Division of Biology and Biological Engineering, California Institute of Technology, California, 91125, USA
| | - Zhongnan Xu
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, PR China
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, PR China
| | - Jing Peng
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, PR China
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, PR China
| | - Qiaolin Xu
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, PR China
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, PR China
| | - Kui Li
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, PR China
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, PR China
| | - Haoyang Wang
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, PR China
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, PR China
| | - Yanbin Guo
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, PR China
- Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, PR China
| |
Collapse
|
3
|
Jones AM, Davis KA, Panaccione DG. A Major Facilitator Superfamily Transporter Contributes to Ergot Alkaloid Accumulation but Not Secretion in Aspergillus leporis. APPLIED MICROBIOLOGY (BASEL, SWITZERLAND) 2024; 4:406-417. [PMID: 39055383 PMCID: PMC11271707 DOI: 10.3390/applmicrobiol4010028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 07/27/2024]
Abstract
Ergot alkaloids are fungal natural products with important roles in agriculture and medicine. We used heterologous expression and gene knockout approaches to investigate potential roles for the product of a major facilitator superfamily transporter gene (easT) recently found in an ergot alkaloid biosynthetic gene cluster in Aspergillus leporis. A strain of Aspergillus fumigatus previously engineered to accumulate lysergic acid, but which did not convert the precursor agroclavine to lysergic acid efficiently or secrete lysergic acid well, was chosen as an expression host for easT. Expression of easT in this strain resulted in accumulation of significantly more pathway intermediates but no detectable lysergic acid. Secretion of ergot alkaloids was reduced in the easT-expressing strain. EasT localized to discrete vesicle-like structures in the cytosol of A. fumigatus, with no localization detected in the plasma membrane. When easT was knocked out in A. leporis, accumulation of lysergic acid amides was reduced relative to the wild type. There was no negative effect on secretion of ergot alkaloids in the knockout mutant. The data indicate that easT encodes a product that contributes to accumulation of ergot alkaloids, perhaps by transporting intermediates between cellular compartments, but does not have a significant role in secreting ergot alkaloids.
Collapse
Affiliation(s)
- Abigail M. Jones
- Division of Plant and Soil Sciences, West Virginia University, Morgantown, WV 26506, USA
| | - Kyle A. Davis
- Division of Plant and Soil Sciences, West Virginia University, Morgantown, WV 26506, USA
| | - Daniel G. Panaccione
- Division of Plant and Soil Sciences, West Virginia University, Morgantown, WV 26506, USA
| |
Collapse
|
4
|
Warke M, Sarkar D, Schaerer L, Vohs T, Techtmann S, Datta R. Comparative assessment of bacterial diversity and composition in arsenic hyperaccumulator, Pteris vittata L. and non-accumulator, Pteris ensiformis Burm. CHEMOSPHERE 2023; 340:139812. [PMID: 37597630 DOI: 10.1016/j.chemosphere.2023.139812] [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: 05/06/2023] [Revised: 08/11/2023] [Accepted: 08/12/2023] [Indexed: 08/21/2023]
Abstract
The use of arsenic (As) for various industrial and agricultural applications has led to worldwide environmental contamination. Phytoremediation using hyperaccumulators is a sustainable soil As mitigation strategy. Microbial processes play an important role in the tolerance and uptake of trace elements such as in plants. The rhizospheric and endophytic microbial communities are responsible for accelerating the mobility of trace elements around the roots and the production of plant growth-promoting compounds and enzymes. Several studies have reported that the As hyperaccumulator, Pteris vittata L. (PV) influences the microbial community in its rhizosphere and roots. Deciphering the differences in the microbiomes of hyperaccumulators and non-accumulators is crucial in understanding the mechanism of hyperaccumulation. We hypothesized that there are significant differences in the microbiome of roots, rhizospheric soil, and bulk soil between the hyperaccumulator PV and a non-accumulator of the same genus, Pteris ensiformis Burm. (PE), and that the differential recruitment of bacterial communities provides PV with an advantage in As contaminated soil. We compared root endophytic, rhizospheric, and bulk soil microbial communities between PV and PE species grown in As-contaminated soil in a greenhouse setting. There was a significant difference (p < 0.001) in the microbiome of the three compartments between the ferns. Differential abundance analysis showed 328 Amplicon Sequence Variants (ASVs) enriched in PV compared to 172 in PE. The bulk and rhizospheric soil of both ferns were abundant in As-resistant genera. However, As-tolerant root endophytic genera were present in PV but absent in PE. Our findings show that there is a difference between the bacterial composition of an As hyperaccumulator and a non-accumulator species grown in As-contaminated soil. These differences need to be further explored to develop strategies for improving the efficiency of metal uptake in plants growing in As polluted soil.
Collapse
Affiliation(s)
- Manas Warke
- Department of Biological Sciences, Michigan Technological University, 1400 Townsend Dr, Houghton, MI, 49931, USA
| | - Dibyendu Sarkar
- Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, Hoboken, NJ, 07030, USA
| | - Laura Schaerer
- Department of Biological Sciences, Michigan Technological University, 1400 Townsend Dr, Houghton, MI, 49931, USA
| | - Tara Vohs
- Department of Biological Sciences, Michigan Technological University, 1400 Townsend Dr, Houghton, MI, 49931, USA
| | - Stephen Techtmann
- Department of Biological Sciences, Michigan Technological University, 1400 Townsend Dr, Houghton, MI, 49931, USA.
| | - Rupali Datta
- Department of Biological Sciences, Michigan Technological University, 1400 Townsend Dr, Houghton, MI, 49931, USA.
| |
Collapse
|
5
|
Sarkar J, Mridha D, Davoodbasha MA, Banerjee J, Chanda S, Ray K, Roychowdhury T, Acharya K, Sarkar J. A State-of-the-Art Systemic Review on Selenium Nanoparticles: Mechanisms and Factors Influencing Biogenesis and Its Potential Applications. Biol Trace Elem Res 2023; 201:5000-5036. [PMID: 36633786 DOI: 10.1007/s12011-022-03549-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 12/28/2022] [Indexed: 01/13/2023]
Abstract
Selenium is a trace element required for the active function of numerous enzymes and various physiological processes. In recent years, selenium nanoparticles draw the attention of scientists and researchers because of its multifaceted uses. The process involved in chemically synthesized SeNPs has been found to be hazardous in nature, which has paved the way for safe and ecofriendly SeNPs to be developed in order to achieve sustainability. In comparison to chemical synthesis, SeNPs can be synthesized more safely and with greater flexibility utilizing bacteria, fungi, and plants. This review focused on the synthesis of SeNPs utilizing bacteria, fungi, and plants; the mechanisms involved in SeNP synthesis; and the effect of various abiotic factors on SeNP synthesis and morphological characteristics. This article discusses the synergies of SeNP synthesis via biological routes, which can help future researchers to synthesize SeNPs with more precision and employ them in desired fields.
Collapse
Affiliation(s)
- Jit Sarkar
- Molecular and Applied Mycology and Plant Pathology Laboratory, Department of Botany, Centre of Advanced Study, University of Calcutta, Kolkata, PIN-700019, India
| | - Deepanjan Mridha
- School of Environmental Studies, Jadavpur University, Kolkata, PIN-700032, India
| | - Mubarak Ali Davoodbasha
- School of Life Sciences, B.S. Abdur Rahman Crescent Institute of Science and Technology, Chennai, Tamil Nadu, PIN-600048, India
| | - Jishnu Banerjee
- Department of Botany, Ramakrishna Mission Vivekananda Centenary College, Rahara, Khardaha, West Bengal, PIN-700118, India
| | - Sumeddha Chanda
- Department of Botany, Scottish Church College, Kolkata, PIN-700006, India
| | - Kasturi Ray
- Department of Botany, North Campus, University of Delhi, University Road, Delhi, PIN-110007, India
| | - Tarit Roychowdhury
- School of Environmental Studies, Jadavpur University, Kolkata, PIN-700032, India
| | - Krishnendu Acharya
- Molecular and Applied Mycology and Plant Pathology Laboratory, Department of Botany, Centre of Advanced Study, University of Calcutta, Kolkata, PIN-700019, India.
| | - Joy Sarkar
- Department of Botany, Dinabandhu Andrews College, Kolkata, PIN-700084, India.
| |
Collapse
|
6
|
Santelli CM, Sabuda MC, Rosenfeld CE. Time-Resolved Examination of Fungal Selenium Redox Transformations. ACS EARTH & SPACE CHEMISTRY 2023; 7:960-971. [PMID: 37228623 PMCID: PMC10204728 DOI: 10.1021/acsearthspacechem.2c00288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 04/21/2023] [Accepted: 04/24/2023] [Indexed: 05/27/2023]
Abstract
Selenium (Se) is both a micronutrient required for most life and an element of environmental concern due to its toxicity at high concentrations, and both bioavailability and toxicity are largely influenced by the Se oxidation state. Environmentally relevant fungi have been shown to aerobically reduce Se(IV) and Se(VI), the generally more toxic and bioavailable Se forms. The goal of this study was to shed light on fungal Se(IV) reduction pathways and biotransformation products over time and fungal growth stages. Two Ascomycete fungi were grown with moderate (0.1 mM) and high (0.5 mM) Se(IV) concentrations in batch culture over 1 month. Fungal growth was measured throughout the experiments, and aqueous and biomass-associated Se was quantified and speciated using analytical geochemistry, transmission electron microscopy (TEM), and synchrotron-based X-ray absorption spectroscopy (XAS) approaches. The results show that Se transformation products were largely Se(0) nanoparticles, with a smaller proportion of volatile, methylated Se compounds and Se-containing amino acids. Interestingly, the relative proportions of these products were consistent throughout all fungal growth stages, and the products appeared stable over time even as growth and Se(IV) concentration declined. This time-series experiment showing different biotransformation products throughout the different growth phases suggests that multiple mechanisms are responsible for Se detoxification, but some of these mechanisms might be independent of Se presence and serve other cellular functions. Knowing and predicting fungal Se transformation products has important implications for environmental and biological health as well as for biotechnology applications such as bioremediation, nanobiosensors, and chemotherapeutic agents.
Collapse
Affiliation(s)
- Cara M Santelli
- Department of Earth and Environmental Sciences, Minneapolis, Minnesota 55455, United States
- BioTechnology Institute, University of Minnesota, Saint Paul, Minnesota 55108, United States
| | - Mary C Sabuda
- Department of Earth and Environmental Sciences, Minneapolis, Minnesota 55455, United States
- BioTechnology Institute, University of Minnesota, Saint Paul, Minnesota 55108, United States
| | - Carla E Rosenfeld
- Section of Minerals and Earth Sciences, Carnegie Museum of Natural History, Pittsburgh, Pennsylvania 15213, United States
| |
Collapse
|
7
|
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.
Collapse
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.)
| |
Collapse
|
8
|
Lima LW, Castleberry M, Wangeline AL, Aguirre B, Dall’Acqua S, Pilon-Smits EAH, Schiavon M. Hyperaccumulator Stanleya pinnata: In Situ Fitness in Relation to Tissue Selenium Concentration. PLANTS (BASEL, SWITZERLAND) 2022; 11:690. [PMID: 35270160 PMCID: PMC8912631 DOI: 10.3390/plants11050690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 02/26/2022] [Accepted: 02/28/2022] [Indexed: 06/14/2023]
Abstract
Earlier studies have shown that Stanleya pinnata benefits from selenium hyperaccumulation through ecological benefits and enhanced growth. However, no investigation has assayed the effects of Se hyperaccumulation on plant fitness in the field. This research aimed to analyze how variation in Se accumulation affects S. pinnata fitness, judged from physiological and biochemical performance parameters and herbivory while growing naturally on two seleniferous sites. Natural variation in Se concentration in vegetative and reproductive tissues was determined, and correlations were explored between Se levels with fitness parameters, herbivory damage, and plant defense compounds. Leaf Se concentration varied between 13- and 55-fold in the two populations, averaging 868 and 2482 mg kg−1 dry weight (DW). Furthermore, 83% and 31% of plants from the two populations showed Se hyperaccumulator levels in leaves (>1000 mg kg−1 DW). In seeds, the Se levels varied 3−4-fold and averaged 3372 and 2267 mg kg−1 DW, well above the hyperaccumulator threshold. Plant size and reproductive parameters were not correlated with Se concentration. There was significant herbivory pressure even on the highest-Se plants, likely from Se-resistant herbivores. We conclude that the variation in Se hyperaccumulation did not appear to enhance or compromise S. pinnata fitness in seleniferous habitats within the observed Se range.
Collapse
Affiliation(s)
- Leonardo Warzea Lima
- Biology Department, Colorado State University, Fort Collins, CO 80523, USA; (L.W.L.); (M.C.); (E.A.H.P.-S.)
| | - McKenna Castleberry
- Biology Department, Colorado State University, Fort Collins, CO 80523, USA; (L.W.L.); (M.C.); (E.A.H.P.-S.)
| | - Ami L. Wangeline
- Biology Department, Laramie County Community College, Cheyenne, WY 82007, USA; (A.L.W.); (B.A.)
| | - Bernadette Aguirre
- Biology Department, Laramie County Community College, Cheyenne, WY 82007, USA; (A.L.W.); (B.A.)
| | - Stefano Dall’Acqua
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo 5, 35131 Padova, Italy;
| | | | - Michela Schiavon
- Biology Department, Colorado State University, Fort Collins, CO 80523, USA; (L.W.L.); (M.C.); (E.A.H.P.-S.)
- Dipartimento di Scienze Agrarie, Forestali e Alimentari, University of Torino, Largo Paolo Braccini 2, 10095 Grugliasco, Italy
| |
Collapse
|
9
|
Wang D, Rensing C, Zheng S. Microbial reduction and resistance to selenium: Mechanisms, applications and prospects. JOURNAL OF HAZARDOUS MATERIALS 2022; 421:126684. [PMID: 34339989 DOI: 10.1016/j.jhazmat.2021.126684] [Citation(s) in RCA: 39] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 06/25/2021] [Accepted: 07/16/2021] [Indexed: 06/13/2023]
Abstract
Selenium is an essential trace element for humans, animals and microorganisms. Microbial transformations, in particular, selenium dissimilatory reduction and bioremediation applications have received increasing attention in recent years. This review focuses on multiple Se-reducing pathways under anaerobic and aerobic conditions, and the phylogenetic clustering of selenium reducing enzymes that are involved in these processes. It is emphasized that a selenium reductase may have more than one metabolic function, meanwhile, there are several Se(VI) and/or Se(IV) reduction pathways in a bacterial strain. It is noted that Se(IV)-reducing efficiency is inconsistent with Se(IV) resistance in bacteria. Moreover, we discussed the links of selenium transformations to biogeochemical cycling of other elements, roles of Se-reducing bacteria in soil, plant and digestion system, and the possibility of using functional genes involved in Se transformation as biomarker in different environments. In addition, we point out the gaps and perspectives both on Se transformation mechanisms and applications in terms of bioremediation, Se fortification or dietary supplementation.
Collapse
Affiliation(s)
- Dan Wang
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, PR China; College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Christopher Rensing
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture & Forestry University, Fuzhou, Fujian 350002, PR China.
| | - Shixue Zheng
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, PR China.
| |
Collapse
|
10
|
Nayak V, Singh KRB, Singh AK, Singh RP. Potentialities of selenium nanoparticles in biomedical science. NEW J CHEM 2021. [DOI: 10.1039/d0nj05884j] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Selenium nanoparticles (SeNPs) have revolutionized biomedical domain and are still developing rapidly. Hence, this perspective elaborates SeNPs properties, synthesis, and biomedical applications, together with their potential for management of SARS-CoV-2.
Collapse
Affiliation(s)
- Vanya Nayak
- Department of Biotechnology
- Faculty of Science
- Indira Gandhi National Tribal University
- Amarkantak
- India
| | - Kshitij RB Singh
- Department of Chemistry
- Govt. V. Y. T. PG. Autonomous College
- Durg
- India
| | - Ajaya Kumar Singh
- Department of Chemistry
- Govt. V. Y. T. PG. Autonomous College
- Durg
- India
| | - Ravindra Pratap Singh
- Department of Biotechnology
- Faculty of Science
- Indira Gandhi National Tribal University
- Amarkantak
- India
| |
Collapse
|
11
|
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.
Collapse
|
12
|
Plant selenium hyperaccumulation- Ecological effects and potential implications for selenium cycling and community structure. Biochim Biophys Acta Gen Subj 2018; 1862:2372-2382. [DOI: 10.1016/j.bbagen.2018.04.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 04/06/2018] [Accepted: 04/23/2018] [Indexed: 11/23/2022]
|
13
|
Jia W, Hu C, Ming J, Zhao Y, Xin J, Sun X, Zhao X. Action of selenium against Sclerotinia sclerotiorum: Damaging membrane system and interfering with metabolism. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2018; 150:10-16. [PMID: 30195382 DOI: 10.1016/j.pestbp.2018.06.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 04/25/2018] [Accepted: 06/13/2018] [Indexed: 06/08/2023]
Abstract
Selenium (Se) in soil is beneficial for environmental stress tolerance of plants, and it has widespread toxic effects on pathogens. Based on the fact that Se significantly inhibited the growth of Sclerotinia sclerotiorum, we set experiments with different concentrations of Se to investigate the action of Se against S. sclerotiorum in this study. The results showed that Se (>0.5 mg L-1) changed the morphology of S. sclerotiorum mycelia, and higher Se concentrations severely damaged mycelial structures. Fourier transform infrared spectroscopy (FTIR) analysis indicated that Se treatment induced the chemical composition of mycelia with much abundance of functional groups such as alcohols, ketones, ammonium and esters, and 0.5 mg L-1 Se maximized their concentrations. Under Se treatments, the electrical conductivity of mycelia increased in a time-dependent manner, and osmolyte concentrations of mycelia increased as well. Se supplementation significantly reduced polymethylgalacturonase (PMG) and carboxymethylcellulase (Cx) activities, which protecting plants from infection, and increased the energy expenditure in S. sclerotiorum. Combined action of Se damage on membrane system, osmoregulation, reduction of cell wall degrading enzymes activities and improvement of energy expenditure resulted in the inhibition of S. sclerotiorum growth. Findings in this study provided evidences for using Se as a potential fungicide to control S. sclerotiorum.
Collapse
Affiliation(s)
- Wei Jia
- Hubei Provincial Engineering Laboratory for New Fertilizers / Research Center of Trace Elements /Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture / College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Chengxiao Hu
- Hubei Provincial Engineering Laboratory for New Fertilizers / Research Center of Trace Elements /Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture / College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Jiajia Ming
- Hubei Provincial Engineering Laboratory for New Fertilizers / Research Center of Trace Elements /Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture / College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Yuanyuan Zhao
- Hubei Provincial Engineering Laboratory for New Fertilizers / Research Center of Trace Elements /Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture / College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Juan Xin
- Hubei Provincial Engineering Laboratory for New Fertilizers / Research Center of Trace Elements /Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture / College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Xuecheng Sun
- Hubei Provincial Engineering Laboratory for New Fertilizers / Research Center of Trace Elements /Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture / College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Xiaohu Zhao
- Hubei Provincial Engineering Laboratory for New Fertilizers / Research Center of Trace Elements /Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture / College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.
| |
Collapse
|
14
|
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.
Collapse
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
| | | |
Collapse
|
15
|
Dangi SR, Bañuelos G, Buyer JS, Hanson B, Gerik J. Microbial community biomass and structure in saline and non-saline soils associated with salt- and boron-tolerant poplar clones grown for the phytoremediation of selenium. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2018; 20:129-137. [PMID: 28678529 DOI: 10.1080/15226514.2017.1337073] [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] [Indexed: 06/07/2023]
Abstract
Poplar trees (Populus spp.) are often used in bioremediation strategies because of their ability to phytoextract potential toxic ions, e.g., selenium (Se) from poor quality soils. Soil microorganisms may play a vital role in sustaining health of soil and/or tolerance of these trees grown in poor quality soils by contributing to nutrient cycling, soil structure, overall soil quality, and plant survival. The effect of naturally occurring salts boron (B) and Se on soil microbial community composition associated with poplar trees is not known for bioremediation strategies. In this study, three Populus clones 13-366, 345-1, and 347-14 were grown in spring 2006 under highly saline, B, and Se clay-like soils in the west side of the San Joaquin Valley (SJV) of CA, as well as in non-saline sandy loam soils located in the east side of the SJV. After 7 years of growing in the respective soils of different qualities, soil samples were collected from poplar clones grown in saline and non-saline soils to examine and compare soil quality effects on soil microbial community biomass and composition. The phospholipid fatty acid (PLFA) analysis was used to characterize microbial community composition in soils from trees grown at both locations. This study showed that microbial biomass and the amount and proportion of arbuscular mycorrhizal fungal (AMF) community were lower in all three poplar clones grown in saline soil compared to non-saline soil. Amounts of Gram + bacterial and actinomycetes PLFAs were significantly lower in poplar clone 13-366 grown in saline soil compared to non-saline soil; however, they did not differ significantly in poplar clones 347-14 and 345-1. Additionally, amounts of saprophytic fungal, Gram - bacterial and eukaryotic PLFA remained similar at saline and non-saline sites under poplar clones 347-14, 345-1, and 13-366. Therefore, this study suggested that salinity and B do have an impact on microbial biomass and AMF; however, these poplar clones still recycled sufficient amount of nutrients to support and protect saprophytic fungal and bacterial communities from the effects of poor quality soils.
Collapse
Affiliation(s)
- Sadikshya R Dangi
- a Water Management Research Unit , San Joaquin Valley Agricultural Sciences Center, USDA Agricultural Research Service , Parlier , CA , USA
| | - Gary Bañuelos
- a Water Management Research Unit , San Joaquin Valley Agricultural Sciences Center, USDA Agricultural Research Service , Parlier , CA , USA
| | - Jeffrey S Buyer
- b Sustainable Agricultural Systems Laboratory , USDA Agricultural Research Service , Beltsville , MD , USA
| | - Bradley Hanson
- c Department of Plant Sciences , University of California-Davis , Davis , CA , USA
| | - James Gerik
- a Water Management Research Unit , San Joaquin Valley Agricultural Sciences Center, USDA Agricultural Research Service , Parlier , CA , USA
| |
Collapse
|
16
|
Shoeibi S, Mozdziak P, Golkar-Narenji A. Biogenesis of Selenium Nanoparticles Using Green Chemistry. Top Curr Chem (Cham) 2017; 375:88. [PMID: 29124492 DOI: 10.1007/s41061-017-0176-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 10/30/2017] [Indexed: 12/18/2022]
Abstract
Selenium binds some enzymes such as glutathione peroxidase and thioredoxin reductase, which may be activated in biological infections and oxidative stress. Chemical and physical methods for synthesizing nanoparticles, apart from being expensive, have their own particular risks. However, nanoparticle synthesis through green chemistry is a safe procedure that different biological sources such as bacteria, fungi, yeasts, algae and plants can be the catalyst bed for processing. Synthesis of selenium nanoparticles (SeNPs) by macro/microorganisms causes variation in morphology and shape of the particles is due to diversity of reduction enzymes in organisms. Reducing enzymes of microorganisms by changing the status of redox convert metal ions (Se2-) to SeNPs without charge (Se0). Biological activity of SeNPs includes their protective role against DNA oxidation. Because of the biological and industrial properties, SeNPs have wide applications in the fields of medicine, microelectronic, agriculture and animal husbandry. SeNPs can show strong antimicrobial effects on the growth and proliferation of microorganisms in a dose-dependent manner. The objective of this review is to consider SeNPs applications to various organisms.
Collapse
Affiliation(s)
- Sara Shoeibi
- Cellular and Molecular Research Center, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
| | - Paul Mozdziak
- Graduate Physiology Program, North Carolina State University, Raleigh, NC, USA
| | - Afsaneh Golkar-Narenji
- Department of Genetic, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| |
Collapse
|
17
|
Schiavon M, Pilon-Smits EAH. The fascinating facets of plant selenium accumulation - biochemistry, physiology, evolution and ecology. THE NEW PHYTOLOGIST 2017; 213:1582-1596. [PMID: 27991670 DOI: 10.1111/nph.14378] [Citation(s) in RCA: 156] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 10/31/2016] [Indexed: 05/20/2023]
Abstract
Contents 1582 I. 1582 II. 1583 III. 1588 IV. 1590 V. 1592 1592 References 1592 SUMMARY: The importance of selenium (Se) for medicine, industry and the environment is increasingly apparent. Se is essential for many species, including humans, but toxic at elevated concentrations. Plant Se accumulation and volatilization may be applied in crop biofortification and phytoremediation. Topics covered here include beneficial and toxic effects of Se on plants, mechanisms of Se accumulation and tolerance in plants and algae, Se hyperaccumulation, and ecological and evolutionary aspects of these processes. Plant species differ in the concentration and forms of Se accumulated, Se partitioning at the whole-plant and tissue levels, and the capacity to distinguish Se from sulfur. Mechanisms of Se hyperaccumulation and its adaptive significance appear to involve constitutive up-regulation of sulfate/selenate uptake and assimilation, associated with elevated concentrations of defense-related hormones. Hyperaccumulation has evolved independently in at least three plant families, probably as an elemental defense mechanism and perhaps mediating elemental allelopathy. Elevated plant Se protects plants from generalist herbivores and pathogens, but also gives rise to the evolution of Se-resistant specialists. Plant Se accumulation affects ecological interactions with herbivores, pollinators, neighboring plants, and microbes. Hyperaccumulation tends to negatively affect Se-sensitive ecological partners while facilitating Se-resistant partners, potentially affecting species composition and Se cycling in seleniferous ecosystems.
Collapse
Affiliation(s)
- Michela Schiavon
- Biology Department, Colorado State University, Fort Collins, CO, 80523-1878, USA
| | | |
Collapse
|
18
|
Schiavon M, Pilon-Smits EAH. Selenium Biofortification and Phytoremediation Phytotechnologies: A Review. JOURNAL OF ENVIRONMENTAL QUALITY 2017; 46:10-19. [PMID: 28177413 DOI: 10.2134/jeq2016.09.0342] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
The element selenium (Se) is both essential and toxic for most life forms, with a narrow margin between deficiency and toxicity. Phytotechnologies using plants and their associated microbes can address both of these problems. To prevent Se toxicity due to excess environmental Se, plants may be used to phytoremediate Se from soil or water. To alleviate Se deficiency in humans or livestock, crops may be biofortified with Se. These two technologies may also be combined: Se-enriched plant material from phytoremediation could be used as green fertilizer or as fortified food. Plants may also be used to "mine" Se from seleniferous soils. The efficiency of Se phytoremediation and biofortification may be further optimized. Research in the past decades has provided a wealth of knowledge regarding the mechanisms by which plants take up, metabolize, accumulate, and volatilize Se and the role plant-associated microbes play in these processes. Furthermore, ecological studies have revealed important effects of plant Se on interactions with herbivores, detrivores, pollinators, neighboring vegetation, and the plant microbiome. All this knowledge can be exploited in phytotechnology programs to optimize plant Se accumulation, transformation, volatilization, and/or tolerance via plant breeding, genetic engineering, and tailored agronomic practices.
Collapse
|
19
|
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]
|
20
|
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.
Collapse
|
21
|
Yuan L, Zhu Y, Lin ZQ, Banuelos G, Li W, Yin X. A novel selenocystine-accumulating plant in selenium-mine drainage area in Enshi, China. PLoS One 2013; 8:e65615. [PMID: 23750270 PMCID: PMC3672165 DOI: 10.1371/journal.pone.0065615] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Accepted: 04/24/2013] [Indexed: 11/21/2022] Open
Abstract
Plant samples of Cardamine hupingshanesis (Brassicaceae), Ligulariafischeri (Ledeb.) turcz (Steraceae) and their underlying top sediments were collected from selenium (Se) mine drainage areas in Enshi, China. Concentrations of total Se were measured using Hydride Generation-Atomic Fluorescence Spectrometry (HG-AFS) and Se speciation were determined using liquid chromatography/UV irradiation-hydride generation-atomic fluorescence spectrometry (LC-UV-HG-AFS). The results showed that C. hupingshanesis could accumulate Se to 239±201 mg/kg DW in roots, 316±184 mg/kg DW in stems, and 380±323 mg/kg DW in leaves, which identifies it as Se secondary accumulator. Particularly, it could accumulate Se up to 1965±271 mg/kg DW in leaves, 1787±167 mg/kg DW in stem and 4414±3446 mg/kg DW in roots, living near Se mine tailing. Moreover, over 70% of the total Se accumulated in C. hupingshanesis were in the form of selenocystine (SeCys2), increasing with increased total Se concentration in plant, in contrast to selenomethionine (SeMet) in non-accumulators (eg. Arabidopsis) and secondary accumulators (eg. Brassica juncea), and selenomethylcysteine (SeMeCys) in hyperaccumulators (eg. Stanleya pinnata). There is no convincing explanation on SeCys2 accumulation in C. hupingshanesis based on current Se metabolism theory in higher plants, and further study will be needed.
Collapse
Affiliation(s)
- Linxi Yuan
- Jiangsu Bio-Engineering Research Centre of Selenium, Suzhou, Jiangsu, China
- School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, China
- Advanced Lab for Selenium and Human Health, Suzhou Institute for Advanced Study, University of Science and Technology of China, Suzhou, Jiangsu, China
| | - Yuanyuan Zhu
- Jiangsu Bio-Engineering Research Centre of Selenium, Suzhou, Jiangsu, China
| | - Zhi-Qing Lin
- Environmental Sciences Program and Department of Biological Sciences, Southern Illinois University, Edwardsville, Illinois, United States of America
| | - Gary Banuelos
- United States Department of Agriculture-ARS, Parlier, California, United States of America
| | - Wei Li
- Jiangsu Bio-Engineering Research Centre of Selenium, Suzhou, Jiangsu, China
| | - Xuebin Yin
- Jiangsu Bio-Engineering Research Centre of Selenium, Suzhou, Jiangsu, China
- School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, China
- Advanced Lab for Selenium and Human Health, Suzhou Institute for Advanced Study, University of Science and Technology of China, Suzhou, Jiangsu, China
| |
Collapse
|
22
|
Lindblom SD, Fakra SC, Landon J, Schulz P, Tracy B, Pilon-Smits EAH. Inoculation of Astragalus racemosus and Astragalus convallarius with selenium-hyperaccumulator rhizosphere fungi affects growth and selenium accumulation. PLANTA 2013; 237:717-29. [PMID: 23117393 DOI: 10.1007/s00425-012-1789-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Accepted: 10/15/2012] [Indexed: 05/08/2023]
Abstract
Little is known about how fungi affect plant selenium (Se) accumulation. Here we investigate the effects of two fungi on Se accumulation, translocation, and chemical speciation in the hyperaccumulator Astragalus racemosus and the non-accumulator Astragalus convallarius. The fungi, Alternaria astragali (A3) and Fusarium acuminatum (F30), were previously isolated from Astragalus hyperaccumulator rhizosphere. A3-inoculation enhanced growth of A. racemosus yet inhibited growth of A. convallarius. Selenium treatment negated these effects. F30 reduced shoot-to-root Se translocation in A. racemosus. X-ray microprobe analysis showed no differences in Se speciation between inoculation groups. The Astragalus species differed in Se localization and speciation. A. racemosus root-Se was distributed throughout the taproot and lateral root and was 90 % organic in the lateral root. The related element sulfur (S) was present as a mixture of organic and inorganic forms in the hyperaccumulator. Astragalus convallarius root-Se was concentrated in the extreme periphery of the taproot. In the lateral root, Se was exclusively in the vascular core and was only 49 % organic. These findings indicate differences in Se assimilation between the two species and differences between Se and S speciation in the hyperaccumulator. The finding that fungi can affect translocation may have applications in phytoremediation and biofortification.
Collapse
|
23
|
Valdez Barillas JR, Quinn CF, Freeman JL, Lindblom SD, Fakra SC, Marcus MA, Gilligan TM, Alford ÉR, Wangeline AL, Pilon-Smits EA. Selenium distribution and speciation in the hyperaccumulator Astragalus bisulcatus and associated ecological partners. PLANT PHYSIOLOGY 2012; 159:1834-44. [PMID: 22645068 PMCID: PMC3425216 DOI: 10.1104/pp.112.199307] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Accepted: 05/25/2012] [Indexed: 05/07/2023]
Abstract
The goal of this study was to investigate how plant selenium (Se) hyperaccumulation may affect ecological interactions and whether associated partners may affect Se hyperaccumulation. The Se hyperaccumulator Astragalus bisulcatus was collected in its natural seleniferous habitat, and x-ray fluorescence mapping and x-ray absorption near-edge structure spectroscopy were used to characterize Se distribution and speciation in all organs as well as in encountered microbial symbionts and herbivores. Se was present at high levels (704-4,661 mg kg(-1) dry weight) in all organs, mainly as organic C-Se-C compounds (i.e. Se bonded to two carbon atoms, e.g. methylselenocysteine). In nodule, root, and stem, up to 34% of Se was found as elemental Se, which was potentially due to microbial activity. In addition to a nitrogen-fixing symbiont, the plants harbored an endophytic fungus that produced elemental Se. Furthermore, two Se-resistant herbivorous moths were discovered on A. bisulcatus, one of which was parasitized by a wasp. Adult moths, larvae, and wasps all accumulated predominantly C-Se-C compounds. In conclusion, hyperaccumulators live in association with a variety of Se-resistant ecological partners. Among these partners, microbial endosymbionts may affect Se speciation in hyperaccumulators. Hyperaccumulators have been shown earlier to negatively affect Se-sensitive ecological partners while apparently offering a niche for Se-resistant partners. Through their positive and negative effects on different ecological partners, hyperaccumulators may influence species composition and Se cycling in seleniferous ecosystems.
Collapse
Affiliation(s)
| | | | | | - Stormy D. Lindblom
- Department of Biology (J.R.V.B., C.F.Q., S.D.L., E.A.H.P.S.), Department of Bioagricultural Sciences and Pest Management (T.M.G.), and Department of Forest and Rangeland Stewardship (E.R.A.), Colorado State University, Fort Collins, Colorado 80523; Department of Biology, Texas A&M University, San Antonio, Texas 78224 (J.R.V.B.); Department of Biology California State University, Fresno, California 93740 (J.L.F.); Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (S.C.F., M.A.M.); and Department of Biology, Laramie County Community College, Cheyenne, Wyoming 82007 (A.L.W.)
| | - Sirine C. Fakra
- Department of Biology (J.R.V.B., C.F.Q., S.D.L., E.A.H.P.S.), Department of Bioagricultural Sciences and Pest Management (T.M.G.), and Department of Forest and Rangeland Stewardship (E.R.A.), Colorado State University, Fort Collins, Colorado 80523; Department of Biology, Texas A&M University, San Antonio, Texas 78224 (J.R.V.B.); Department of Biology California State University, Fresno, California 93740 (J.L.F.); Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (S.C.F., M.A.M.); and Department of Biology, Laramie County Community College, Cheyenne, Wyoming 82007 (A.L.W.)
| | - Matthew A. Marcus
- Department of Biology (J.R.V.B., C.F.Q., S.D.L., E.A.H.P.S.), Department of Bioagricultural Sciences and Pest Management (T.M.G.), and Department of Forest and Rangeland Stewardship (E.R.A.), Colorado State University, Fort Collins, Colorado 80523; Department of Biology, Texas A&M University, San Antonio, Texas 78224 (J.R.V.B.); Department of Biology California State University, Fresno, California 93740 (J.L.F.); Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (S.C.F., M.A.M.); and Department of Biology, Laramie County Community College, Cheyenne, Wyoming 82007 (A.L.W.)
| | - Todd M. Gilligan
- Department of Biology (J.R.V.B., C.F.Q., S.D.L., E.A.H.P.S.), Department of Bioagricultural Sciences and Pest Management (T.M.G.), and Department of Forest and Rangeland Stewardship (E.R.A.), Colorado State University, Fort Collins, Colorado 80523; Department of Biology, Texas A&M University, San Antonio, Texas 78224 (J.R.V.B.); Department of Biology California State University, Fresno, California 93740 (J.L.F.); Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (S.C.F., M.A.M.); and Department of Biology, Laramie County Community College, Cheyenne, Wyoming 82007 (A.L.W.)
| | - Élan R. Alford
- Department of Biology (J.R.V.B., C.F.Q., S.D.L., E.A.H.P.S.), Department of Bioagricultural Sciences and Pest Management (T.M.G.), and Department of Forest and Rangeland Stewardship (E.R.A.), Colorado State University, Fort Collins, Colorado 80523; Department of Biology, Texas A&M University, San Antonio, Texas 78224 (J.R.V.B.); Department of Biology California State University, Fresno, California 93740 (J.L.F.); Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (S.C.F., M.A.M.); and Department of Biology, Laramie County Community College, Cheyenne, Wyoming 82007 (A.L.W.)
| | - Ami L. Wangeline
- Department of Biology (J.R.V.B., C.F.Q., S.D.L., E.A.H.P.S.), Department of Bioagricultural Sciences and Pest Management (T.M.G.), and Department of Forest and Rangeland Stewardship (E.R.A.), Colorado State University, Fort Collins, Colorado 80523; Department of Biology, Texas A&M University, San Antonio, Texas 78224 (J.R.V.B.); Department of Biology California State University, Fresno, California 93740 (J.L.F.); Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (S.C.F., M.A.M.); and Department of Biology, Laramie County Community College, Cheyenne, Wyoming 82007 (A.L.W.)
| | - Elizabeth A.H. Pilon-Smits
- Department of Biology (J.R.V.B., C.F.Q., S.D.L., E.A.H.P.S.), Department of Bioagricultural Sciences and Pest Management (T.M.G.), and Department of Forest and Rangeland Stewardship (E.R.A.), Colorado State University, Fort Collins, Colorado 80523; Department of Biology, Texas A&M University, San Antonio, Texas 78224 (J.R.V.B.); Department of Biology California State University, Fresno, California 93740 (J.L.F.); Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (S.C.F., M.A.M.); and Department of Biology, Laramie County Community College, Cheyenne, Wyoming 82007 (A.L.W.)
| |
Collapse
|
24
|
El Mehdawi AF, Pilon-Smits EAH. Ecological aspects of plant selenium hyperaccumulation. PLANT BIOLOGY (STUTTGART, GERMANY) 2012; 14:1-10. [PMID: 22132825 DOI: 10.1111/j.1438-8677.2011.00535.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Hyperaccumulators are plants that accumulate toxic elements to extraordinary levels. Selenium (Se) hyperaccumulators can contain 0.1-1.5% of their dry weight as Se, levels toxic to most other organisms. In this review we summarise what is known about the ecological functions and implications of Se (hyper)accumulation by plants. Selenium promotes hyperaccumulator growth and also offers a plant several ecological advantages through negative effects on Se-sensitive partners. High tissue Se levels reduce herbivory and pathogen infection, and high-Se litter deposition can inhibit neighbouring plants. There is no evidence for a cost of hyperaccumulation in terms of reproductive functions or pollinator visitation. Hyperaccumulators offer a niche for Se-tolerant herbivores, pollinators, microbes and neighbouring plants. They may even facilitate these partners through Se enrichment: neighbouring plants with elevated Se levels enjoy enhanced growth and reduced herbivory. Through combined negative and positive effects on ecological partners, Se hyperaccumulators likely affect local plant, microbial and animal species composition and richness, favouring Se-tolerant species at different trophic levels. By locally concentrating Se and altering its chemical form, Se hyperaccumulators likely play an important role in Se entry into, and Se cycling through, seleniferous ecosystems. These findings are of significance since they provide insight into the ecological reverberations of Se hyperaccumulation, and shed light on the possible selection pressures that have led to the evolution of this fascinating phenomenon. Better ecological insight will also help in the management of seleniferous areas and the agricultural production of Se-rich crops for phytoremediation or biofortification.
Collapse
Affiliation(s)
- A F El Mehdawi
- Biology Department, Colorado State University, Fort Collins, CO 80523, USA
| | | |
Collapse
|
25
|
El Mehdawi A, Quinn C, Pilon-Smits E. Selenium Hyperaccumulators Facilitate Selenium-Tolerant Neighbors via Phytoenrichment and Reduced Herbivory. Curr Biol 2011; 21:1440-9. [DOI: 10.1016/j.cub.2011.07.033] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2011] [Revised: 07/20/2011] [Accepted: 07/21/2011] [Indexed: 12/29/2022]
|