Production of glycoalkaloids from callus cultures of Solanum hainanense Hance

Leaf explants of the Solanum hainanense plant, grown in vitro, were cultured in basal Murashige and Skoog (MS) media supplemented with 0.5 mg/L kinetin and 1 mg/L 2,4-dichlorophenoxyacetic acid (2,4-D) for callus initiation. For maintenance and proliferation, the callus was cultured on MS medium supplemented with 1 mg/L 6-benzylaminopurine (BAP) and 0.5 mg/L 2,4-D. The glycoalkaloid content in the callus was at its maximum after ten weeks of culture (188.65 mg/g), whereas that of the one-year-old control was 22.22 mg/g in the root and 5.99 mg/g in the stem. The glycoalkaloid extracted from the callus inhibited the activity of collagenase on collagen gel. High performance liquid chromatography (HPLC) analysis showed that biotransformation occurred when a callus was grown on medium supplemented with various carbon sources. These results suggest that callus of S. hainanense is a good material for production of glycoalkaloid.