Comparative analysis of two strains of Agaricus blazei fruiting bodies appearing in the same compost

Abstract

It was found that white and brown colors of Agaricus blazei Murrill simultaneously appeared in the same compost. In this paper, several factors such as light, pH and moisture content of the casing soil on the development of the white colored A. blazei. were examined. Furthermore, differences in the components of the fruitbodies and the pharmacological effects of brown and white fruit-body extracts from A. blazei. were compared. It was estimated the light and moisture content of the cultivation environment bore no significant effect on white fruit-body formation. However, the pH of the casing soil was found to be different between the sites of brown and white fruit-bodies. The different pH of the casing soil was assumed to be caused by a heterogeneous mixture of soil and calcium hydroxide for the sake of the pH adjuster, and the high pH of the casing soil might have been a factor in the white coloring of pileus. The comparisons of the chemical components of brown and white fruiting bodies showed differences in certain components. However, pharmacological tests such as the anti-platelet aggregation test stimulated by the platelet activating factor PAF or arachidonic acid, the inhibition test of the IL-8 gene expression stimulated by TNF-α, the anti-mutagen test of 2-amino-3-methylimidazo [4,5-f] quinolin, IQ, and the improvement test of human rough surfaces using the replica method did not show any significant differences.