Studies on the Effects of Media on Growth and Nutritional Composition of Pleurotus Tuber-regium (Fries) Singer Mushroom

The effects of different solutions and media on growth and nutrient composition of Pleurotus tuber-regium were investigated. The different solutions used are glucose, fructose, sucrose and Knop\'s solutions. The media used are cassava agar, cocoyam agar, corn agar, potato agar and yam agar. Glucose solution produced the highest growth in stipe height (9.50 ± 0.91cm), stipe diameter (4.46 ± 0.59cm) and pileus diameter (9.50 ± 0.59 cm). Knop\'s solution induced the least stipe diameter (7.20 ± 0.59cm) while sucrose produced the least stipe diameter (3.90±0.54cm) and pileus diameter (7.50 ± 0.95cm). Analyses of nutrient composition (%) showed that fructose solution induced the highest protein (13.6±0.99%) and fibre (15.6±0.36%) contents. The highest oil (15.0±0.17%) content was induced by glucose solution but it also induced the least protein (3.06 ± 0.09%) content. The best diametric mycelial extension (1.64cm±0.087), wet (1.105± 0.054g) and dry (0.768±0.008g) weights were observed on cocoyam agar. The least diametric mycelial extensions of 1.26± 0.087 and 1.33 ± 0.087cm were produced on corn agar and potato agar, respectively. Corn agar gave the least wet (0.845 ± 0.084g) and dry (0.74 ± 0.008g) weights. Keywords: Pleurotus tuber-regium, Growth, Nutritional composition, Sclerotium, Mushroom Bio-Research Vol. 6 (2) 2008: pp. 355-358

 CC Onyeke, LE Onyishi, OS Okeke, EC Nwachukwu