globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gbi.12224
Scopus记录号: 2-s2.0-85007621180
论文题名:
Selenium (IV,VI) reduction and tolerance by fungi in an oxic environment
作者: Rosenfeld C.E.; Kenyon J.A.; James B.R.; Santelli C.M.
刊名: Geobiology
ISSN: 1472-4677
EISSN: 1472-4669
出版年: 2017
卷: 15, 期:3
起始页码: 441
结束页码: 452
语种: 英语
Scopus关键词: bacterium ; bioremediation ; concentration (composition) ; fungus ; growth response ; immobilization ; microbial activity ; oxic conditions ; pollutant removal ; pollution tolerance ; reduction ; selenite ; selenium ; soil microorganism ; volatilization ; Fungi ; pollutant ; selenic acid ; selenious acid ; selenium ; aerobic metabolism ; Ascomycetes ; growth, development and aging ; metabolism ; microbiology ; oxidation reduction reaction ; pollutant ; Aerobiosis ; Ascomycota ; Environmental Pollutants ; Oxidation-Reduction ; Selenic Acid ; Selenious Acid ; Selenium ; Soil Microbiology
Scopus学科分类: Earth and Planetary Sciences: General Earth and Planetary Sciences ; Environmental Science: General Environmental Science ; Agricultural and Biological Sciences: Ecology, Evolution, Behavior and Systematic
英文摘要: Microbial processes are known to mediate selenium (Se) oxidation–reduction reactions, strongly influencing Se speciation, bioavailability, and transport throughout the environment. While these processes have commonly been studied in anaerobic bacteria, the role that aerobic fungi play in Se redox reactions could be important for Se-rich soil systems, dominated by microbial activity. We quantified fungal growth, aerobic Se(IV, VI) reduction, and Se immobilization and volatilization in the presence of six, metal-tolerant Ascomycete fungi. We found that the removal of dissolved Se was dependent on the fungal species, Se form (i.e., selenite or selenate), and Se concentration. All six species grew and removed dissolved Se(IV) or Se(VI) from solution, with five species reducing both oxyanions to Se(0) biominerals, and all six species removing at least 15%–20% of the supplied Se via volatilization. Growth rates of all fungi, however, decreased with increasing Se(IV,VI) concentrations. All fungi removed 85%–93% of the dissolved Se(IV) within 10 d in the presence of 0.01 mm Se(IV), although only about 20%–30% Se(VI) was removed when grown with 0.01 mm Se(VI). Fungi-produced biominerals were typically 50- to 300-nm-diameter amorphous or paracrystalline spherical Se(0) nanoparticles. Our results demonstrate that activity of common soil fungi can influence Se form and distribution, and these organisms may therefore play a role in detoxifying Se-polluted environments. © 2017 John Wiley & Sons Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/85058
Appears in Collections:影响、适应和脆弱性

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作者单位: Department of Mineral Sciences, Smithsonian Institution National Museum of Natural History, Washington, DC, United States; Department of Earth Science and BioTechnology Institute, University of Minnesota - Twin Cities, Minneapolis, MN, United States; MIT/WHOI Joint Program in Oceanography, Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Department of Environmental Science and Technology, University of Maryland, College Park, MD, United States; C. M. Santelli and C. E. Rosenfeld, Department of Earth Sciences & BioTechnology Institute, University of Minnesota – Twin Cities, Minneapolis, MN, United States

Recommended Citation:
Rosenfeld C.E.,Kenyon J.A.,James B.R.,et al. Selenium (IV,VI) reduction and tolerance by fungi in an oxic environment[J]. Geobiology,2017-01-01,15(3)
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