Abstract: In order to explore the difference in the main chemical constituents of Ganoderma lucidum fruiting bodies from different geographical regions (Anhui 1, Jilin 1 and Jilin 2), various analytical methods were used to determine the proximate chemical composition, microelement composition, polysaccharide composition, ganoderic acid content, amino acid composition and fatty acid composition. The results showed that the contents of protein, amino acids, fatty acids, microelements and triterpene compounds in G. lucidum from different regions were quite different. The contents of three microelements (Ca, Mg and Fe), essential amino acids and unsaturated fatty acids were high in all three samples. Both the total contents of amino acids and fatty acids were in the decreasing order: Anhui 1 > Jilin 2 > Jilin 1. The contents of crude water-soluble polysaccharides in these samples were similar, whereas the content of alkali soluble polysaccharides and the monosaccharide composition of purified polysaccharides were considerably different. Among the three samples, the total content of ganoderic acid A and ganoderic acid B in Anhui 1 was the highest (5.62 mg/g). These conclusions provide technical support for further improving the existing quality standard for G. lucidum fruiting bodies.

Key words: Ganoderma lucidum, chemical constituents, ganoderic acid, polysaccharides