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Effect of UV irradiation of different material forms on the contents of vitamin D2 and ergosterol in shiitake and oyster mushrooms. (a) The contents of vitamin D2 in shiitake and oyster mushrooms by different treatments. (b) The contents of ergosterol in shiitake and oyster mushrooms by different treatments. The control is the unexposed mushrooms. Bars with different letters are significantly different (ANOVA and Duncan’s HSD, p < 0.05).
