Antioxidant properties and electrochemical behavior of cultivated commercial Indian edible mushrooms

Abstract

Methanolic extracts of cap and stipe of commercially obtained mushrooms Agaricus bisporus, Hypsizygus ulmarius, and Calocybe indica were analyzed for their antioxidant activity in different chemical systems including reducing power, free radical scavenging, ferric reducing antioxidant power (FRAP), superoxide scavenging, peroxide scavenging, metal chelating activities and electrochemical behavior. Scavenging effects on 2,2-diphenyl-1-picrylhydrazyl radicals were moderate (43.5-59.0%) at 1.5 mg/ml. Chelating effects on ferrous ions were moderate to excellent (40.6-96.1%) at 20 mg/ml. At 12 mg/ml, the reducing powers were excellent (2.54-1.71). FRAP results were in the range 2.15-0.98 at 16 mg/ml. The ability to scavenge H2O2 was moderate to excellent (48.9-97.7%) at 1.5 mg/ml. At 10 mg/ml, Agaricus bisporus cap proved to be better at scavenging superoxide radicals than others. Similar electrochemical responses of all extracts suggested similar electroactive chemical composition. The total phenols in the extracts ranged from 14.73-26.72 mg/g.The total flavonoid content ranged from 1.12-2.17 μg/g.

Comparison of antioxidant properties in cap and stipe of <i>Lentinula edodes </i> and #8211;a medicinal mushroom

“…In the present study, the extracts from the cap showed higher phenolic content than the stipe, in general (Fig. 1) compared to the reported values in other mushrooms such as cap methanolic extracts for Lactarius deliciosus (10.66 ± 0.52 mg GAE/g), Tricholoma portentosum (6.57 ± 0.31 mg GAE/g) and Hypsizygus ulmarius (26.72 ± 0.50 mg GAE/g) Babu and Rao, 2013). Mushroom extracts have high levels of phenolic compounds, composed of one or more aromatic rings bearing one or more hydroxyl groups, which can exhibit extensive free radical-scavenging activities as hydrogen donors or electron-donating agents and metal ion-chelating properties.…”

“…At 25 mg/mL concentration, the ferric reducing power of cap aqueous extract was found to be higher (332.77 ± 8.5 µM FeSO 4 equivalent) whereas, the lowest FRAP value was obtained in stipe methanolic extract at 5 mg/ml concentration (23.17 ± 0.23 µM FeSO 4 equivalent). Excellent FRAP in Hypsizygus ulmarius cap compared to other extracts were reported (Babu and Rao, 2013). The results revealed that cap aqueous extract possessed hydrogen-donating capacity indicating the significant reducing power of the extract.…”

“…There are various mushroom species, which are sources of physiological agents for medicinal applications, viz., antiviral, anti-tumor, cardiovascular and antibacterial . Antioxidant properties of several specialty and edible mushrooms have been studied earlier (Babu and Rao, 2013;Mishra et al, 2013 and2014). Lentinula edodes is the second most important edible mushroom in the world accounting 25% of the world mushroom production.…”

Total Phenolic Content, Antioxidant and Antimicrobial Properties of Pleurotus ostreatus Grown on Lime (Tilia Tomentesa) Leaves

“…There are two basic categories of antioxidants, natural and synthetic. Recently, interest has increased considerably in finding naturally occurring antioxidants for use in foods or medicinal materials to replace synthetic antioxidants, which are being restricted due to their carcinogenicity [17,18] and mushrooms is reported that natural antioxidans [19][20][21][22].…”

A Comparative Study on Antioxidant Properties and Metal Contents of Some Edible Mushroom Samples From Kastamonu, Turkey

“…These reactive species take part in degenerative processes and functional changes associated with diseases like cancer, rheumatoid arthritis, cirrhosis etc (Babu & Rao, 2013).…”