Patchouli is an aromatic species whose essential oil is largely employed by perfume industry. This conventional propagation is carried out using cuttings. Micropropagation is an alternative for clonal propagation of pathogens free individuals in large scale. We analyzed the influence of different combinations of auxins and kinetin in patchouli organogenesis and different kinds of substrate mixtures for the acclimatization of micropropagated plantlets. Two tests of organogenesis induction were carried out. In the first, five kinetin concentrations (0.0; 1.0; 2.0; 4.0 and 6.0 mg L‑1) and four IAA concentrations (0.0; 0.5; 1.0 and 2.0 mg L-1) were tested, and in the second, five kinetin concentrations (0.0; 0.5; 1.0; 2.0 and 4.0 mg L-1) and three NAA concentrations (0.0; 0.1 and 0.5 mg L-1). For acclimatization the following substrates were analyzed: coconut dust + formulated fertilizer (NPK 3-12-6 + Ca, S, Zn, B, Cu, Fe, Mn and B at 3.0; 2.5; 0.1; 0.025; 0.01; 0.075; 0.05 and 0.0015%, respectively) at the concentration of 12 g L-1 + limestone (1 g L-1) [PBC]; coconut dust + vermiculite (2:1) + formulated fertilizer at the concentration of 12 g L-1 + limestone (1 g L-1) [PBCV (2:1)]; coconut dust + vermiculite (1:1 v/v) + formulated fertilizer at the concentration of 12 g L-1 + limestone (1 g L-1) [PBCV (1:1)]; coconut dust + limestone (1 g L-1) + MS salts [PCMS]; vermiculite added with MS salts, using 15 mL of the salt mixture per plant [VMS]; vermiculite + formulated fertilizer at the concentration of 12 g L-1 [VMB]. Direct organogenesis can be promoted by MS medium supplemented with 2.47 mg L-1 of kinetin and 0.1 mg L-1 of NAA. The shoot elongation, individualization and shoot rooting steps, however, were promoted in MS medium without growth regulators. For acclimatization one of the best results was obtained using PBCV (1:1).
Pogostemon cablin; aromatic plant; micropropagation; substrates
