Extraction, Antimicrobial, and Antioxidant Activities of Crude Polysaccharides from the Wood Ear Medicinal Mushroom Auricularia auricula-judae (Higher Basidiomycetes)

International Journal of Medicinal Mushrooms
Ming CaiPeilong Sun

Abstract

In this study, crude polysaccharides of culinary-medicinal mushroom Auricularia auricular-judae were extracted by hot water extraction and alcohol precipitation, and their antimicrobial and antioxidant activities were investigated. An optimum extraction condition was obtained at a ratio of liquid to solid 70 mL/g, temperature 90°C, time 4 h and extraction number 4. Accordingly, the best yield of crude polysaccharides was 6.89% with 76.12% in purity. Some bacteria and fungi were used for antimicrobial studies. It was found that crude A. auricula-judae had great antimicrobial activities against Escherichia coli and Staphylococcus aureus, but no activities on the others. The inhibitory diameters of antimicrobial zones for the two were 5.55 ± 0.182 and 9.84 ± 0.076 mm, respectively. Moreover, crude A. auricula-judae had significant antioxidant activities in scavenging free radicals, reducing power assays, and Fe2+ chelating ability assay. Results revealed that crude A. auricula-judae has a great potential as antimicrobial and antioxidant, and it can be a supplementary food for human health.

Citations

Sep 19, 2017·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Annalisa MarucaFrancesco Ortuso
Jul 23, 2016·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Jiao-Jiao ZhangHua-Bin Li
Feb 6, 2021·Journal of Agricultural and Food Chemistry·Enchao LiuXianghong Meng
Oct 17, 2020·Planta medica·Violette HamersAurélie Urbain
Jun 5, 2018·Biomedicine & Pharmacotherapy = Biomédecine & Pharmacothérapie·Damini KothariSoo-Ki Kim

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