Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Enhancement of ergocalciferol (vitamin D) content in mushrooms by UV irradiation

자외선 조사에 의한 버섯의 ergocalciferol(비타민 D) 함량의 증진

  • 최성진 (대구가톨릭대학교 생명공학과)
  • Received : 2017.05.17
  • Accepted : 2017.06.15
  • Published : 2017.06.30
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Abstract

Ergocalciferol is known as having vitamin D activity. In this study, the effects of UV irradiation on the increase of egocalciferol content were investigated in 7 kinds of mushrooms, i.e, lily mushroom (Flammulina velutipes), oyster mushroom (Pleurotus ostreatus), young oyster mushroom (Pleurotus ostreatus), king oyster mushroom (Pleurotus eryngii), button mushroom (Agaricus bisporus), shiitake (Lentinula edodes), and wood ear mushroom (Auricularia auricula-judae). Mushrooms which were not exposed to UV light contained negligible amount of ergocalciferol in all kinds of tested mushrooms, but UV irradiation increased their content of ergocalciferol. Of UV A, B and C, UV B light was the most effective to increase ergocalciferol contents. In mushrooms, the increase in ergocalciferol content occurred only in the peel within 1 mm depth from the surface, which was directly exposed to the UV light. Therefore, when fresh whole mushrooms were irradiated with UV light, lily mushroom, the mushroom with a larger surface area compared to volume, such as lily mushroom, was more favorable in producing ergocalciferol. On the other hand when the mushrooms were freeze-dried and cut, the mushrooms with a higher ergosterol, such as king oyster mushroom, shiitake or button mushroom, were more favorable in generating ergocalciferol.

Ergocalciferol은 vitamin D의 활성을 가지는 것으로 알려져 있다. 본 연구에서는 팽이(Flammulina velutipes), 느타리 (Pleurotus ostreatus), 애느타리(Pleurotus ostreatus), 새송이(Pleurotus eryngii), 양송이(Agaricus bisporus), 표고(Lentinula edodes), 목이(Auricularia auricula-judae) 등 7종의 버섯을 대상으로 자외선 조사에 따른 ergocalciferol(EC, 비타민 $D_2$) 함량의 증진 효과를 조사하였다. 자외선을 조사하지 않은 버섯의 ergocalciferol 함량은 극히 낮았으나 자외선 조사에 의해 ergocalciferol 함량이 크게 증가하였으며, 자외선 A, B, C 중 특히 자외선 B가 EC 함량 증진에 효과적이었다. 버섯에서 ergocalciferol의 생성은 자외선에 직접 노출되는 부위 즉 깊이 1 mm 이내의 버섯 표면에서만 일어나는 것으로 조사되었다. 따라서 세절하지 않은 생 버섯에 자외선을 조사할 경우 팽이 버섯과 같이 체적에 비해 표면적인 넓은 종류의 버섯에서 ergocalciferol 생성이 많았고, 건조 및 세절할 경우에는 EC 생성의 기질인 ergosterol의 함량이 높은 버섯에서 ergocalciferol 생성이 많았는데, 새송이, 표고, 양송이 등이 이에 속하였다.

Keywords

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