Micropropagation of ‘Manacá-de-Cheiro’ (<i>Brunfelsia uniflora</i> (Pohl) D. Don), an Ornamental Species Native to Brazil
2025
Ana Victória Conde van den Broek | Mariana Pelais Leite | Jean Carlos Cardoso
The introduction of new ornamental species and cultivars is one of the hallmarks of innovation in global floriculture. <i>Brunfelsia uniflora</i>, a subshrub native to Brazil, has white, lilac, and blue flowers on the same plant, in addition to a distinctive fragrance. As it is a wild species, technologies such as large-scale clonal propagation of superior genotypes are still scarce, limiting its supply to the flower market. Therefore, a successful micropropagation protocol was developed for <i>B. uniflora</i> using nodal segments and shoot tips as initial explants. In the multiplication phase, the use of 6-benzylaminopurine produced the highest multiplication rates (10.3–10.9 shoots/explant) and the number of leaves in the shoots. In vitro shoot rooting using MS medium with reduced macronutrient concentrations and supplemented with IBA resulted in a 91.7% rooting rate. The greatest difficulty in micropropagating this species was the high percentage of shoots that developed calli. The highest percentage of callus formation occurred with the addition of auxins at high concentrations (1.0 and 1.5 mg L<sup>−1</sup>). Even so, the shoots and plantlets were acclimatized, demonstrating the effectiveness of this technique for the production of <i>B. uniflora</i> plantlets.
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