RESUMEN
An attempt was made to standardize the protocol for the shoot regeneration via caulogenesis in Pteris vittata L. employing leaf primordium explants. Calli were induced on Murashige and Skoog's (MS) and Parkers and Thompson's (P and T) media supplemented with different combinations of 2, 4-dichlorophenoxyaceticacid (2, 4-D), 6-benzylaminopurine (BAP), alpha-naphthalene acetic acid (NAA) and Indole-3-acetic acid (IAA). A combination of full strength MS medium with 2, 4-D (2.26 microM) and BAP (2.22 microM) was found to be ideal for profuse callusing (80%) against other combinations. More shoot differentiation (2.8 +/- 0.06) was achieved from the calli on one-fourth strength of P and T media fortified with BAP (4.44 microM) and NAA (2.68 microM) when compared to other combinations but statistically not significant.