High frequency shoot regeneration from in vitro derived leaf explants of Wattakaka volubilis (L.f.) Stapf
was achieved through callus mediated organogenesis. Organogenic calli were induced from 20 day old
aseptic seedling explants on Murashige and Skoog medium fortified with various concentrations and
combinations of plant growth regulators, benzylaminopurine (BAP), α-naphthaleneacetic acid (NAA),
indole 3-butyric acid (IBA) and gibberellic acid (GA3). A mean of 8.6 shoots developed from organogenic
callus induced from a 2 x 2 cm leaf explants on MS medium with 3% sucrose having 5.37μM NAA in
combination with 2.22 μM BAP with 60% induction capacity. Further development of adventitious
shoots could be achieved by sub culturing the callus to the same medium with 4.40 μM BAP and 0.288
μM GA3. Organogenesis could not be achieved from the calli of ex vitro derived leaf explants. The
developed shoots were rooted on half-strength MS medium with 1% sucrose, 4.90 μM IBA and 0.93 μM
kinetin at a frequency of 85%. Well rooted plantlets were then transplanted to vermiculite soil (3:1)
mixture in polythene covered pots kept under culture room conditions. Approximately 60% plantlets
survived and grew into whole plants.