Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.foodchem.2004.08.022
Title: Distribution of ergosterol in different tissues of mushrooms and its effect on the conversion of ergosterol to vitamin D2 by UV irradiation
Authors: Jasinghe, V.J.
Perera, C.O. 
Keywords: Agaricus bisporus
Ergosterol
Flammulina velutipes
Lentinula edodes
Mushrooms
Pleurotus cystidus
Pleurotus ostreatus
UV irradiation
Vitamin D2
Issue Date: Sep-2005
Citation: Jasinghe, V.J., Perera, C.O. (2005-09). Distribution of ergosterol in different tissues of mushrooms and its effect on the conversion of ergosterol to vitamin D2 by UV irradiation. Food Chemistry 92 (3) : 541-546. ScholarBank@NUS Repository. https://doi.org/10.1016/j.foodchem.2004.08.022
Abstract: Analysis of ergosterol content in different tissues of Shiitake mushrooms showed a significant difference (p < 0.01) in its distribution. Thus, the conversion of ergosterol in whole mushrooms to vitamin D2, by exposure to UV irradiation, was significantly affected (p < 0.01) by the orientation of the mushroom tissues to the UV. The highest ergosterol content was found in button mushrooms (7.80 ± 0.35 mg/g DM) while the lowest was in enoki mushrooms (0.68 ± 0.14 mg/g DM). The conversion of ergosterol to vitamin D2 was about four times higher when gills were exposed to UV-A irradiation than when the outer caps were exposed to the same. The lowest conversion to vitamin D2 (12.5 ± 0.28 μg/g DM) was observed for button mushrooms while the highest value (45.1 ± 3.07 μg/g DM) was observed for oyster mushrooms. The optimum moisture content of mushrooms for this conversion was around 78% on a wet basis and the temperature was around 35°C. © 2004 Elsevier Ltd. All rights reserved.
Source Title: Food Chemistry
URI: http://scholarbank.nus.edu.sg/handle/10635/93621
ISSN: 03088146
DOI: 10.1016/j.foodchem.2004.08.022
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