Abstract
In this study, three polysaccharides (AMP-H, AMP-V and AMP-F) were obtained from polysaccharides of Antler Mushroom (AMP) by hot air drying, vacuum drying and freeze drying, respectively. The chemical composition and antioxidant capacity of AMP-H, AMP-V and AMP-F were investigated. The results showed that the AMP was an acidic polysaccharide containing a small amount of protein. The drying method did not affect the monosaccharide type, but changed the composition ratio of monosaccharide and the content of uronic acid. The content of uronic acid in AMP-H was lower significantly than that in AMP-V and AMP-F (p<0.05). Antioxidant studies showed that AMP-H, AMP-V and AMP-F had strong scavenging ability against hydroxyl radical, superoxide anion radical and DPPH radical. Within a certain concentration range, antioxidant capacity of AMP-H, AMP-V and AMP-F was positively correlated with the mass concentration. The drying method had different effects on the antioxidant capacity of AMP. Compared with AMP-H and AMP-V, AMP-F had the strongest antioxidant activity. Based on the above results, freeze drying is the best drying method suitable for AMP preparation among the three tested methods.
Highlights
Velvet Antler mushroom (Lyophyllum decastes), is a kind of rare edible mushroom with medicinal properties
The possible reason is that structure of the uronic acid in AMP-H is destroyed under dry, oxygen and high temperature conditions (Chen and Huang, 2019)
The uronic acid content of AMP-H, AMP-V and AMP-F was less than 5%
Summary
Velvet Antler mushroom (Lyophyllum decastes), is a kind of rare edible mushroom with medicinal properties. It belongs to order Agaricales, dried mushroom family and Lyophyllum (Arana-Gabriel et al, 2018). Β-dextran is main functional ingredients of polysaccharides in Antler mushroom (AMP) containing β-1, 3-D dextran and β-1, 6-D dextran (Zheng et al, 2013). Studies have shown that AMP has multiple effects (Lee et al, 2011). It is a low-calorie and low-fat health product that can lower blood pressure and cholesterol and prevent senescence with antitumor, cosmetic and immunity-enhancing effects
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