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International Journal of Medicinal Mushrooms
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ISSN Druckformat: 1521-9437
ISSN Online: 1940-4344

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International Journal of Medicinal Mushrooms

DOI: 10.1615/IntJMedMushr.v8.i1.100
pages 77-84

Selenium Enrichment of Pleurotus cornucopiae (Paulet) Rolland and Grifola frondosa (Dicks.:Fr.) S.F. Gray Mushrooms

Robert B. Beelman
Department of Food Science, 116D Borland Laboratory, College of Agricultural Sciences, The Pennsylvania State University, University Park, Pennsylvania, 16802-4507, USA
Daniel J. Royse
Borland Laboratory, Departments of Food Science and Plant Pathology, College of Agricultural Sciences, The Pennsylvania State University, University Park, PA 16802-4507, USA

ABSTRAKT

The objective of this study was to determine if Pleurotus cornucopiae (Paulet) Rolland and Grifola frondosa (Dicks.:Fr.) S.F. Gray mushrooms could be enriched with selenium by addition of sodium selenite to the growth substrate. Separate crops were grown using a cottonseed-hullor sawdust-based synthetic medium for each mushroom with various levels of selenium added by addition of appropriate amounts of sodium selenite prior to pasteurization and inoculation. Basidiomata were harvested from the treated substrates, weighed for yield determination, freeze-dried for solids determination, and then analyzed for selenium content using graphite-furnace atomic absorption spectrophotometry. Yield of P. cornucopiae was not significantly affected by addition of selenium to the substrate, while yield and growing period of G. frondosa. was reduced when higher levels of selenium were added. Selenium increased in basidiomata of both mushrooms in direct response to levels added to the substrate, but greater uptake of selenium occurred with P. cornucopiae compared to G. frondosa. These results indicate that both mushrooms can be predictably enriched with selenium to become an excellent nutritional source of selenium but more selenium would need to be added to the substrate, used to grow G. frondosa., with the same level of selenium present in the basidiomata.


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