RELATIONSHIP BETWEEN FRUITING BODIES COMP OSITIONS AND SUBSTRATE IN HIRATAKE AND MAITAKE MUSHROOMS CULTIVATED ON SAWDUST SUBSTRATE BEDS - CHEMICAL-COMPOSITIONS AND MINERAL CONTENTS

Twentyfive samples of Hiratake (Pleurotus ostreatus) and sixteen sampl es of Maitake (Grifola frondosa) mushroom cultivated on sawdust substr ate beds paired with its substrate beds, which were all of distinct or igins, were available. Proximate compositions and mineral contents in these mushrooms and substrate beds were determined. Effect of the sawd ust substrate composition on the mushroom composition were examined. I n Hiratake mushroom, protein content in fruiting bodies was significan tly related to nitrogen content in the substrates. Concentrations of m inerals to the fruiting bodies from the substrates were found in K (3. 20 times), Na (1.64 times), P (1.70 times), Cu (1.90 times), Zn (2.38 times) and Cd (2.75 times) but significant correlation between them wa s only found in Cd. In Maitake mushroom, protein content in fruiting b odies was not significantly related to nitrogen content in the substra tes. Concentration to the fruiting bodies from the substrates were fou nd in K (16.51 times), Na (6.59 times), Mg (1.24 times), P (4.04 times ), Cu (3.37 times), Zn (4.10 times) and Cd (9.26 times) but significan t correlation between them was only found in Cu.