Abstract

Seven strains of Polyporus umbellatus, collected from seven provinces of China, were employed to investigate each mycelial growing rate, extra- and intracellular polysaccharide content. The results showed that Hebei strain had the highest growing rate while Heilongjiang strain did the lowest. Both Shaanxi and Heilongjiang strains produced the most dried weight of mycelium, and at the same time Shaanxi and Hubei strains exhibited the highest intra- and extracellular polysaccharide content. Correlation analysis results showed that intra- and extracellular polysaccharide content had significant and positive relationship, but extracellular content was negatively correlated with daily mycelial growing rate.

Key words: Polyporus umbellatus, mycelium growth, polysaccharide content.