Resumo

MURILLO-GOMEZ, Paola Andrea; HOYOS S., Rodrigo  e  CHAVARRIAGA, Paul. Organogénesis in-vitro using three tissues types of tree tomato [ Solanum betaceum (Cav.)]. Agron. colomb. [online]. 2017, vol.35, n.1, pp.5-11. ISSN 0120-9965.  https://doi.org/10.15446/agron.colomb.v35n1.61330.

Tree tomato is a fruit with great economic potential due to its high nutritional value. The induction of direct organogenesis in this species is a great alternative for clonal propagation of disease-free plants, and also useful for genetic transformation. In this study was assessed the induction of organogenesis in vitro using three different tissues: leaves, petioles and sexual seeds of the variety Common. All tissues were cultured on MS supplemented with agar, sucrose and TDZ or BAP phytohormones at 0.5 to 3 mg L-1, combined or not with the auxins IAA and NAA. Although petioles and seeds had a great potential for regeneration of plantlets, leaves produced more shoots (average of 18.4 shoots/explant) on medium containing TDZ 0.5 mg L-1. Additionally, its easy handling and resistance to physical damage may be useful traits to perform genetic trans-formation. The highest average of shoots produced from seeds and petioles were 4.3 and 3.1 shoots/explant, respectively. The production of multiple shoots in petioles was influenced by low concentrations of auxins. The emergence of the radicle in the seeds was important for the formation of shoots.

Palavras-chave : Clonal propagation; shoot induction; tamarillo; tissue culture; phytohormones..

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