This work aimed at optimizing the micropropagation protocol of Pfaffia tuberosa, a medicinal species found in several regions of Brazil. The treatment of donor plants with benomyl (1%), successively followed with solutions of commercial bleach (2 drops/100mL water; for 2 min), ethanol (70%; for 10 seconds), sodium hypochloride (1%) + commercial bleach (2 drops/100mL water; for 10 minutes) and HgCl2 (0.1%; for 5 min) on the disinfection step of explants were suitable for disinfection and plant regeneration. in vitro plantlets must be subcultivated to a new MS medium at 30 days intervals. Explants from nodal segments showed a higher multiplication rate when compared to apical segments. A decline was not observed on the propagation rate during five successive subcultives in vitro. Plantlets showed an elevated index of survival in the acclimatization step.
medicinal plant; tissue culture; Amaranthaceae; brazilian ginseng; disinfection
