Abstract: In order to evaluate the effects of exogenous indole butyric acid (IBA) and callus formation on the anti-oxidant activity, total phenolics, and anthocyanin constituents of Morus nigra L. and M. alba L. cuttings, we investigated the variations before and after the treatment. The results indicate that anti-oxidant ability, total phenolic, and anthocyanin constituents of the callus stems of both Morus species were higher than those of non-callus forming species. There were also increases observed in anti-oxidant ability, total phenolic, and anthocyanin constituents of calli treated with IBA (1 000–3 000 mg/L).(Author for correspondence. Tel: +90 346 219 1010; Fax: +90 346 219 1186; E-mail: msokmen@cumhuriyet.edu.tr)

Key words: anthocyanin, anti-oxidant activity, callus, cutting, indole butyric acid, mulberry, phenolics.