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RESEARCH PAPER
Year : 2019  |  Volume : 8  |  Issue : 4  |  Page : 41-47

Effect OF UV-B light and sunlight exposure on the Vitamin d2 content of button (Agaricus bisporus) and oyster (Pleurotus ostreatus) Mushrooms


1 Associate Professor, Department of Home Science, Women's Christian College, Chennai, India
2 Assistant Professor, Department of Home Science, SDNB Vaishnav College for Women, Chennai, India

Correspondence Address:
T S Lakshmi
Associate Professor, Department of Home Science, Women's Christian College, Chennai
India
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Source of Support: None, Conflict of Interest: None


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Mushrooms are found to have vitamin D2 in an inactive form (ergosterol), which when exposed to UV light can be converted to its active form (ergocalciferol). This study had scrutinized the vitamin D2 content of cultivated button (Agaricus bisporus) and oyster mushrooms (Pleurotus ostreatus), treated post-harvest using UV-B (sample B) and sunlight (sample C) on exposing them to the respective treatments for 30 min each. The untreated mushrooms (sample A) of both varieties were used as a baseline comparator to the vitamin D2 content in mushrooms exposed to sun and UV light. The mushrooms were exposed to sunlight between 11 a.m to 3.00 p.m, as it is the time when UVB radiation is at its peak. The vitamin D2 content of the mushrooms were estimated using the liquid chromatography mass spectrometry. The UV light treatment caused an increase in the vitamin D2 content of button mushroom from 0.41 to 7.41 μg/100 g and from 0.34 to 8.39 μg/ 100 g in oyster mushrooms. On exposure to sunlight, the vitamin D2 content of button mushrooms was found to be 2.29 μg/100 g whereas that of the oyster mushrooms was found to be below the levels of quantification. Thus, UV light provides an effective method for increasing vitamin D2 levels in button and oyster mushrooms.


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