Cultural characteristics of mycelial growth of Pleurotus eryngii

Abstract

　Cultural chracteristics of mycelial growth of Pleurotus eryngii were examined and compared with those of Lentinus edodes and Grifola frondosa. The results were as follows. (1) The optimum temperature for mycelial growth of P. eryngii on YMG medium was 30°C. (2) Pleurotus eryngii grew in the intial pH range of 5.0-8.0 with the optimum at pH 6.0, while L. edodes and G. frondosa grew well at the intial pH of 4.0 and 5.0, respectively, but very poorly at pH higher than 6.0. (3) The pH of cultured medium changed with mycelial growth of P. eryngii. It shifted to higher value when the intitial pH was lower than 6.0, and to lower value when the initial pH was higher than 6.5. (4) Pleurotus eryngii grew fairly well under illumination by fluorescent lighting at below 700 lx, while the mycelial growth of L. edodes and G. frondosa was completely arrested by illumination.