A comparative study on the bioactive components and antioxidant activities of Phellinus orientoasiaticus and two species of Sanghuangporus
The Sanghuangporus species are well-known due to their medicinal values.Polysaccharides,flavonoids and triterpenes are the main active ingredients of Sanghuangporus,and the medicinal values of the three have received widespread attention.Phellinus orientoasiaticus is a wood-inhabiting fungus growing in the living trees of Rosaceae.It is phylogenetically related with Sanghuangporus and its medicinal value is rarely reported.To determine the medicinal value of P.orientoasiaticus,the natural basidiomata of Sanghuangporus baumii and S.lonicericola from Northeast China were selected as comparative studying materials for they are extensively investigated medicinal fungal species.The content of crude polysaccharides,total flavonoids,and total triterpenoids and their antioxidant activities were used as comparative research indicators.The determination results showed that the polysaccharide content for S.baumii was 4.64 mg/g,2.94 mg/g for S.lonicericola,and 3.68 mg/g for P.orientoasiaticus.The total flavonoid content was 65.53 mg/g,187.74 mg/g,and 46.19 mg/g respectively.The total triterpene content of S.baumii was 5.38 mg/g,of S.lonicericola 15.87 mg/g,and of P.orientoasiaticus 10.17 mg/g.The antioxidant activities included DPPH free radical scavenging capacity,ABTS free radical scavenging ability,superoxide anion scavenging ability,and hydroxyl radical scavenging ability.The polysaccharides of S.lonicericola and P.orientoasiaticus showed comparatively high antioxidant activity,and the antioxidant activity of total triterpenoids of S.lonicericola and P.orientoasiaticus was also comparatively strong.This study demonstrates that P.orientoasiaticus has a good application prospect for its comparatively high polysaccharide,total flavonoid and total triterpenes content and excellent antioxidant activity.
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