ABTS Cation scavenging activity and total phenolic content of three moss species

A limited number of mosses have ever been studied in regard to antioxidant activity, with only a few belonging to the European species. As part of our ongoing screening of bryophytes as natural antioxidant resources, a relevant biological activity investigation was conducted on three moss species, namely Brachythecium rutabulum (Hedw.) Schimp. (Brachytheciaceae), Calliergonella cuspidata (Hedw.) Loeske (Hypnaceae) and Hypnum mammillatum (Brid.) Loeske (Hypnaceae), collected in Germany. The antioxidant activity of corresponding aqueous extracts was evaluated on the basis of their ABTS (2,2'-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid)) cation scavenging activities. The total phenolic contents were determined as well. This study led to the detection of a moderate total phenolic content of the moss B. rutabulum, indicating for the first time its potential in searching for novel antioxidant agents.