The effect of BA (0.0-3.0 渭M) and methyl jasmonate (MeJA; 10-1000 渭M) treatment on callus growth, total phenolic content and corresponding antioxidant activity was also determined following 4 weeks of culture on 陆 MS medium (liquid). Maximum callus biomass (2.61 g fresh weight) was obtained in medium containing 1.0 渭M BA. The total phenolic content varied significantly (p < 0.05) in callus grown on BA, and ranged between 10.33 and 14.30 mg gallic acid equivalent (GAE) per g dry weight (DW) (compared to control 10.17 mg GAE per g DW). Antioxidant activity, measured by three in vitro assays, i.e., 2,2鈥? azinobis (3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) radical scavenging, 1,1-diphenyl-2 picrylhydrazyl (DPPH) radical scavenging and ferric reducing antioxidant power (FRAP) assays showed maximum activity in callus grown on 3.0 渭M BA containing medium. High performance liquid chromatography (HPLC) analysis showed the presence of high gallic acid content (143.63 mg/100 g DW) when compared to wild tuber (5.5 mg/100 g DW). The result indicate that callus grown on medium supplemented with 3.0 渭M BA showed high phenolic content along with increased antioxidant activity, however, callus growth was higher with 1.0 渭M BA. The result of this investigation has commercial applications as increased biomass production will yield active compounds, much needed by the pharmaceutical and neutraceutical industries.