Tag Archives: volatile components

Nutriceutical potential of Pleurotus tuber-regium sclerotium

Reginald C. Ohiri

Department of Biochemistry, Faculty of Science, University of Port Harcourt;East-West Road, Choba, Rivers State, Nigeria;
e-mail: raycohiri@yahoo.com; reginald.ohiri@uniport.edu.ng

The aim of the study was to determine the composition of the sclerotium of  Pleurotus tuber-regium and to analyze its nutritional potential. Major minerals and micronutrients content of the P. tuber-regium sclerotium were determined. The study has shown fairly high concentrations of potassium and magnesium as major minerals with values of 60.66 ± 4.13 and 41.79 ± 3.14 mg/kg, while manganese and zinc were micronutrients with the highest values of 1.20 ± 0.10 and 0.95 ± 0.07 mg/kg. Glutamic acid and aspartic acid were also observed in high concentrations with values of 11.51 ± 1.01 and 5.52 ± 0.86 mg/kg. The mushroom powder of P. tuber-regium was a source for production of oil, which was analyzed by GC-MS method. Benzenedicarboxylic acid mono-(2-ethylhexyl) ester and benzenedicarboxylic acid butyl-cyclohexyl ester were volatile constituents predominating with percentage total of 78.7 and 5.2, respectively. It is concluded that the presence of mineral elements, amino acids and volatile components observed in this fungus indicated the presence of the nutritional potential in the sclerotia of P. tuber-regium.

GC/MS analysis of Tremella fuciformis (White jelly mushrooms) oil

Reginald C. Ohiri

Department of Biochemistry, Faculty of science, University of Port Harcourt;
East-West Road, Choba, Rivers State, Nigeria;
e-mail: raycohiri@yahoo.com, reginald.ohiri@uniport.edu.ng

The use of mushrooms for the treatment of diseases can be traced to Paleolithic era. One mushroom that has shown potent medicinal properties both by oral consumption and topical application is the Tremella fuciformis. GC/MS analyses of T. fuciformis oil obtained by hydro-distillation showed four predominant compounds. 9,19-Cyclolanost-24-en-3-ol, (3.beta.)- was the most predominant with RT of 20.766 and 24.672 min and a percentage total of 32.681 followed by 7-Isopropenyl-1,4a-dimethyl-4,4a,5 ,6,7,8-hexahydro-3H-naphthalen-2-one with RT of 22.425 min and a percentage total of 21.334, lupeol had RT of 22.825 and 23.230 min and a percentage total of 18.531, while lanosterol had RT of 21.079 and 23.034 min and a percentage total of 17.845. These four compounds represent 90.391% of the total constituent compounds in T. fuciformis oil. The therapeutic properties of two predominant compounds (lanosterol and lupeol) of this mushroom confirm its use for the treatment of both dermatological and ophthalmological related diseases by traditional medical practitioners.