3.4. Effect of MHP in solid-state culture
To investigate the effect of MHP on mycelial growth in the solid state cultivation, the MHP modified agar (containing the same composition as PDA with potato starch being replaced by MHP) and the PDA were compared separately. Images of the hyphae growth are displayed in Fig. 2. It was found that the hyphae growth rate of P. eryngii in PDA and MHP agar were 4.57±0.23 and 6.43 ± 0.21 mm/day, respectively. It was noted that the MHP in solidstate culture could facilitate the hyphae growth, and gave a better growth enhancement result than that of the PDA medium.