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HOME > J. Microbiol > Volume 51(6); 2013 > Article
Research Support, Non-U.S. Gov't
Reduction of Organic and Inorganic Selenium Compounds by the Edible Medicinal Basidiomycete Lentinula edodes and the Accumulation of Elemental Selenium Nanoparticles in Its Mycelium
Elena Vetchinkina , Ekaterina Loshchinina , Viktor Kursky , Valentina Nikitina
Journal of Microbiology 2013;51(6):829-835.
DOI: https://doi.org/10.1007/s12275-013-2689-5
Published online: December 19, 2013
Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Saratov 410049, Russian FederationInstitute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Saratov 410049, Russian Federation
Corresponding author:  Ekaterina Loshchinina , Tel: +7-8452-970403, 
Received: 13 December 2012   • Accepted: 9 June 2013
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Abstract

We report for the first time that the medicinal basidiomycete Lentinula edodes can reduce selenium from inorganic sodium selenite (SeIV) and the organoselenium compound 1,5- diphenyl-3-selenopentanedione-1,5 (DAPS-25) to the elemental state, forming spherical nanoparticles. Submerged cultivation of the fungus with sodium selenite or with DAPS- 25 produced an intense red coloration of L. edodes mycelial hyphae, indicating accumulation of elemental selenium (Se0) in a red modification. Several methods, including transmission electron microscopy (TEM), electron energy loss spectroscopy (EELS), and X-ray fluorescence, were used to show that red Se0 accumulated intracellularly in the fungal hyphae as electron-dense nanoparticles with a diameter of 180.51±16.82 nm. Under designated cultivation conditions, shiitake did not reduce selenium from sodium selenate (SeVI).

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    Reduction of Organic and Inorganic Selenium Compounds by the Edible Medicinal Basidiomycete Lentinula edodes and the Accumulation of Elemental Selenium Nanoparticles in Its Mycelium
    J. Microbiol. 2013;51(6):829-835.   Published online December 19, 2013
    DOI: https://doi.org/10.1007/s12275-013-2689-5
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