Effects of different extraction methods on the release of non-volatile flavor components in shiitake mushroom (Lentinus edodes)

Abstract

Shiitake mushroom is a highly nutritious and delicious edible fungus with a unique flavour, making it popular among consumers globally. In this study, the effects of different extraction methods on the release of non-volatile flavour substances in shiitake mushroom were investigated using e-tongue, high performance liquid chromatography (HPLC), and principal component analysis (PCA). The results of pretreatment showed that hot air drying at 60 ℃ had higher umami intensity. On the basis of it, enzymatic hydrolysis was found to be beneficial for the release of soluble sugars (alcohols), organic acids, and free amino acids, especially umami, sweet amino acids like Glu, Ser, and Thr. Double enzymatic hydrolysis had higher umami intensity. On the other hand, cooking was beneficial to the release of 5′-nucleotides, with 5′-AMP and 5′-GMP being key flavour substances in high-pressure cooking. In conclusion, enzymatic hydrolysis can increase the ratio of umami and sweet amino acids, and high-pressure cooking is the best way to promote the release of 5′ -nucleotides. The findings of this study provide a theoretical foundation for the development of shiitake mushroom condiment.