Abstract
Aechmea setigera is an endemic bromeliad from Amazon with ornamental potential. Bromeliads have been propagated by tissue culture. The consistency of the culture medium in vitro multiplication influences the rate of propagation. In this sense, the objective of this study was to evaluate different culture systems with the use of 6-benzylaminopurine (BAP) on in vitro propagation and the effect of different substrates in acclimatization of plantlets Aechmea setigera . In vitro germinated seedlings were inoculated in MS medium in liquid stationary, semisolid, double-phase systems, plus 6-benzylaminopurine (BAP) in different concentrations (0, 2.2, 4.4, 8.8 and 17.7 μM). The ex vitro rooting and acclimatization were performed on substrate Plantmax Forest ®, vermiculite and sawdust eucalyptus. After three successive subcultures, the double-phase system showed a higher number of regenerated shoots in comparison to other systems. Acclimatization using the combination of commercial substrate Plantmax Forest ® and vermiculite favored the growth of micropropagated plants. The use of a culture medium double-phase without growth regulator, and the rooting in acclimatization are feasible strategy for the micropropagation of A. setigera .
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