title: Antioxidant capacity of fresh and processed fruit bodies and mycelium of Auricularia auricula-judae (Fr.) Quél.
abstract: Auricularia auricula-judae is currently grown in Malaysia. In the present study, the methanolic extracts from fruit bodies (fresh, oven-dried, and freeze-dried) and mycelium of A. auricula-judae were evaluated for their antioxidant capacities based on 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging activity and ferric reducing antioxidant power (FRAP) assay. The total phenolic content in the extracts were also measured. The extract of freeze-dried fruit bodies of A. auricula-judae had potent DPPH free radical scavenging activity with a 50% effective concentration of 2.87 mg/mL, whereas the FRAP value of A. auricula-judae mycelium was 5.22 micromol of FeSO(4).7H(2)O equivalents/g of mycelium sample. Further, a positive correlation (R(2) = 0.7668) between FRAP level of A. auricula-judae extracts and the total phenolic contents was observed. Thus the method of processing of fresh fruit bodies had an effect on the antioxidant potential of A. auricula-judae.
authors.affiliation: Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia.
authors.forename: Y S
authors.initials: YS
authors.lastname: Kho
authors.forename: S
authors.initials: S
authors.lastname: Vikineswary
authors.forename: Noorlidah
authors.initials: N
authors.lastname: Abdullah
authors.forename: U R
authors.initials: UR
authors.lastname: Kuppusamy
authors.forename: H I
authors.initials: HI
authors.lastname: Oh
mesh_terms: D000975:Antioxidants / Q000302:isolation & purification / Q000494:pharmacology*; D001487:Basidiomycota / Q000737:chemistry*; D001713:Biphenyl Compounds; D005296:Ferrous Compounds; D016166:Free Radical Scavengers / Q000302:isolation & purification / Q000494:pharmacology*; D005612:Freeze Drying; D025282:Mycelium; D010636:Phenols / Q000302:isolation & purification; D010851:Picrates; D028321:Plant Preparations / Q000494:pharmacology*
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D005296:Ferrous Compounds; D016166:Free Radical Scavengers; D010636:Phenols; D010851:Picrates; D028321:Plant Preparations; C020748:ferrous sulfate; C004931:1,1-diphenyl-2-picrylhydrazyl