RESUMO
Callus cultures were initiated from leaf of Cassia bicapsularis L. on solid Murashige and Skoog [MS] basal medium supplemented with different growth regulators. Excellent growth of callus was obtained in medium supplemented with 1 mg/l 2, 4-dichlorophenoxyacetic acid [2, 4-D] and grown in the dark. The obtained callus was subcultured every 4 weeks in the dark at 25°C. The Callus was compact, yellowish brown in color and used for establishment of cell suspension cultures. Maximum growth of suspension cultures was achieved in medium supplemented with 1 mg/l 2, 4-D and 0.1 mg/l kinetin. The growth rate of cells was initially slow but as the cultures proceeded, the growth increased significantly over a period of 22 days then the growth of cells was stable for 35 days