title: Antioxidant property of edible mushrooms collected from Ethiopia.
abstract: Two cultivated (P. ostreatus and L. edodes) and five wild (L. sulphureus, A. campestris, T. clypeatus, T. microcarpus and T. letestui) edible mushrooms were analyzed for their antioxidant activities, total phenolics, total flavonoids, phenolic profile and ergothioneine content. Results showed that A. campestris had the greatest antioxidant activity in all assays with lower EC50 (mg/ml) values of 1.4, 3.6 and 0.035 for scavenging, reducing and chelating activities, respectively. To correlate well with activities, A. campestris also exhibited greater total phenolics and total flavonoids content of 14.6 mg GAE/g and 1.97 mg CE/g, respectively. The maximum concentration (μg/g) of the individual phenolic compounds were 7.80 (P. ostreatus) for caffeic acid, 4.55 (T. letestui) for chlorogenic acid, 15.8 (T. microcarpus) for p-coumaric acid, 20.3 (A. campestris) for ferulic acid, 561.9 (A. campestris) for gallic acid, 38.7 (A. campestris) for p-hydroxybenzoic acid and 7.08 (A. campestris) for myricetin. All samples tested contained different amounts of ergothioneine ranging from 0.08 (L. sulphureus) to 3.78 (P. ostreatus) mg/g in dry weight.
authors.affiliation: Center for Food Science and Nutrition, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia. Electronic address: ashuyz1@yahoo.com.
authors.forename: Ashagrie Z
authors.initials: AZ
authors.lastname: Woldegiorgis
authors.affiliation: Department of Life Sciences, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia.
authors.forename: Dawit
authors.initials: D
authors.lastname: Abate
authors.affiliation: Center for Food Science and Nutrition, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia.
authors.forename: Gulelat D
authors.initials: GD
authors.lastname: Haki
authors.affiliation: Department of Food Science, The Pennsylvania State University, University Park, PA 16802, United States.
authors.forename: Gregory R
authors.initials: GR
authors.lastname: Ziegler
mesh_terms: D000363:Agaricales / Q000737:chemistry*; D000975:Antioxidants / Q000032:analysis*; D005002:Ethiopia; D010084:Oxidation-Reduction; D010636:Phenols / Q000032:analysis*
chemical_list: D000975:Antioxidants; D010636:Phenols
keywords: Antioxidant; Ergothioneine; Flavonoids; Mushroom; Phenolics