Cardarelli M., Borgognone D., Colla G., In vitro propagation of Obregonia denegrii Frič. (Cactaceae), Propagation of Ornamental Plants, 2010, 10(1):29-36
The experiments examine seed germination, seedling growth and areole activation in Obregonia denegrii in vitro cultures. The authors compare explant types and the effects of growth regulators, putrescine and silver nitrate on shoot number, callus formation, hyperhydricity and rooting. The tables show separate stages of the protocol. GA₃ concentration is reported inconsistently in the methods and the germination table.