Carbon is an essential nutrient needed by fungi and affects mycelial growth. Pleurotus
ostreatus, for example, grows well on medium that contains millet extract [10] while broth media
that contain dextrose are good for Pleurotus florida mycelial growth [17]. Jonathan and Fasidi [15]
reported that the edible mushroom Psathyerella atroumbonata grows well on glucose. Growth of P.
portentosus CMUHH121-005, on the other hand, was observed to be significantly enhanced in MS
medium that contained 3% malt extract in this study.