Abstract: In order to explore the efficacy and activity of some wild Ganoderma in Hainan Island and the rational utilization of wild Ganoderma.The morphological and molecular identification of three wild Ganoderma collected from Hainan Island was carried out,and the monosaccharide composition and antioxidant capacity of fruiting polysaccharides were analyzed.The results showed that HN-1 was Ganoderma sinense,HN-2 was Ganoderma australe,HN-3 was Ganoderma mastoporum.Different Ganoderma showed a difference in the monosaccharide composition and molar ratio.HN-1 polysaccharide is mainly composed of mannose,xylose and rhamnose with a molar ratio of 1∶0.29∶0.14.The HN-2 polysaccharide is mainly composed of mannose and glucose,and the molar ratio is 1∶1.7.HN-3 polysaccharide is mainly composed of mannose,xylose and glucose,and its molar ratio is 1∶1.98∶1.8.The polysaccharides of three Ganoderma have strong antioxidant capacity,and their antioxidant capacity increases with the increase of polysaccharide concentration.HN-1 has the strongest antioxidant activity,followed by HN-3,and HN-2 has the weakest antioxidant activity.The results of this study provide basic information for better protection and utilization of wild Ganoderma resources in Hainan Island,and have certain reference value.

Key words: Ganoderma, phylogenetic evolution, polysaccharide composition, antioxidant activity