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Comparison of Chemical Composition of Fruiting Bodies of Some Edible Mushrooms Cultivated on Sawdust

Siwulski M., Jasińska A., Sobieralski K., Sas-Golak I.

Ecological Chemistry and Engineering. A

2011

Vol. 18, nr 1

89-96

In the present research the chemical compositions of fruiting bodies of two strains of Lentinula edodes, two strains of Pleurotus eryngii, Auricularia auricula-judae and A. polytricha were assessed. Above-mentioned mushrooms were cultivated on birch and beech sawdust. The content of protein, fat, carbohydrates and ash in fruiting bodies was assessed. The results obtained show that the cultivation substrate influenced the chemical compositions of fruiting bodies of examined mushroom species and strains. The highest amount of protein was found in fruiting bodies of P. eryngii; but fruiting bodies of L. edodes contained the highest amount of fat and ash. Fruiting bodies of the genus Auricularia was characterized by the highest content of carbohydrates.

Określono skład chemiczny owocników wybranych grzybów uprawnych: dwóch odmian Lentinula edodes', dwóch odmian Pleurotus eryngii, Auricularia auricula-judae oraz A. polytricha. Uprawę prowadzono na dwóch rodzajach trocin: brzozowych i bukowych. Określono zawartość białka, tłuszczu, węglowodanów oraz popiołu w owocnikach badanych grzybów. Uzyskane wyniki wykazały wpływ rodzaju trocin na skład chemiczny owocników badanych gatunków i odmian grzybów jadalnych. Najwyższą zawartością białka charakteryzowały się owocniki P. eryngii, natomiast owocniki L. edodes zawierały największą ilość tłuszczu i popiołu. Owocniki grzybów z rodzaju Auricularia charakteryzowały się największą zawartością węglowodanów.

Investigation of the kinetics of selenium accumulation by Lentinula edodes (Berk.) mycelial culture by use of reversed-phase high-performance liquid chromatography with fluorimetric detection

Turło J., Gutkowska B., Herold F., Łuczak I.

Acta Chromatographica

2009

Vol. 21, no. 1

1-11

We hypothesized that extracts from selenium (Se)-enriched Lentinula edodes mycelia would have higher anticancer and immunostimulating properties than the nonenriched extracts currently used to treat cancer. Previously, we demonstrated that submerged cultivated mycelia of L. edodes accumulated Se from the cultivation medium very efficiently, more so than yeast. The objective of this study was to investigate the kinetics of Se accumulation by L. edodes mycelial culture. The L. edodes mycelia were cultivated in medium enriched with 20 µg mL -1 Se in a 10-L jar fermenter. Each day, a 100-mL sample was taken from the fermenter and the concentration of Se in the dried mycelia, in the filtered medium, and in the wash water was determined by reversed-phase high-performance liquid chromatography (RP HPLC). We adapted a widely used fluorimetric method based on derivatization with 2,3-diaminonaphthalene for analysis of Se for RP HPLC. Se recovery was determined on the basis of the theoretical amount of Se in the cultivation medium. To detect volatile selenium compounds released from the fermenter, the concentration of Se in the ethanol and in the activated charcoal used in the washers and exhaust filters was determined. The time-course of the Se content of dry mycelial biomass and in filtered medium indicated that the most effective accumulation of Se occurred at the beginning of the trophophase (log phase of growth), between the second and fourth days of cultivation. The Se concentration in mycelia peaked on day 7 (3041 µg g -1 ) and decreased thereafter in proportion to the increase in the concentration of Se in the ethanol and activated charcoal from the fermenter exhaust filters.