Huang Guocheng, Cai Weixi, Xu Baojun
1 Food Science and Technology Program, Beijing Normal University-Hong Kong Baptist University United International College, Zhuhai, Guangdong, China.
Int J Vitam Nutr Res. 2017 Sep;87(5-6):1-10. doi: 10.1024/0300-9831/a000294. Epub 2016 Nov 21.
Mushrooms are a great source of vitamin D and vitamin B; however, the content of these vitamins in dried mushrooms has not fully been investigated. Thus, the objectives of this study were to determine the contents of vitamin D, ergosterol, and vitamin B in commercially dried edible mushrooms in China and to investigate the effect of UV-C irradiation on fresh mushrooms. Among the 35 species of dried mushrooms considered for this study, the average ergosterol content was 1.98 mg/g, while the average vitamin D content was 16.88 µg/g. The average vitamin B content in dried mushrooms was 12.68 µg/g. Fresh shaggy ink caps and oyster mushrooms, when exposed to UV-C at 254 nm at a dose of 0.25 J/cm for 10, 30, and 60 min, showed significantly (p < 0.05) increased vitamin D2 content (229.7 and 67.0 µg/g, respectively) as compared to its fresh counterparts. The conversion of ergosterol to vitamin D induced by UV-C irradiation at 0.25 J/cm was significant (p < 0.05). In conclusion, dried commercial mushrooms have higher contents of ergosterol and vitamin D than fresh mushrooms. UV-C radiation can be used to increase vitamin D content in mushrooms.
蘑菇是维生素D和维生素B的重要来源;然而,干蘑菇中这些维生素的含量尚未得到充分研究。因此,本研究的目的是测定中国市售干制食用菌中维生素D、麦角甾醇和维生素B的含量,并研究紫外线C照射对鲜蘑菇的影响。在本研究考虑的35种干蘑菇中,麦角甾醇的平均含量为1.98毫克/克,而维生素D的平均含量为16.88微克/克。干蘑菇中维生素B的平均含量为12.68微克/克。新鲜的鬼伞和平菇在254纳米的紫外线C照射下,剂量为0.25焦耳/平方厘米,照射10、30和60分钟,与新鲜对照相比,维生素D2含量显著增加(分别为229.7和67.0微克/克)(p<0.05)。在0.25焦耳/平方厘米的紫外线C照射下,麦角甾醇向维生素D的转化是显著的(p<0.05)。总之,市售干蘑菇的麦角甾醇和维生素D含量高于鲜蘑菇。紫外线C辐射可用于增加蘑菇中的维生素D含量。