Resumo

HENAO RAMIREZ, Ana María; URREA TRUJILLO, Aura Inés  e  ATEHORTUA GARCES, Lucía. IN VITRO GERMINATION AND VEGETATIVE PROPAGATION THROUGH BUD DEVELOPMENT OF SACHA INCHI (Plukenetia volubilis). Acta biol.Colomb. [online]. 2022, vol.27, n.1, pp.70-78.  Epub 12-Fev-2022. ISSN 0120-548X.  https://doi.org/10.15446/abc.v27n1.88727.

This study describes the in vitro seed germination and micropropagation of Plukenetia volubilis (sacha inchi), an oilseed crop rich in omega-3 fatty acids, with health benefits and several industrial applications. Seed germination was evaluated in different culture media (MS and 1/2 MS), seed coat presence/absence and culture temperature (18 °C and 28 °C). Micropropagation was performed using axillary bud development (ABD) on nodal segments from in vitro seedlings. KIN, BAP and 2-ip were evaluated for ABD, and the effect of modified MS in 453 mg L-1 CaCl2 and 351.62 mg L-1 MgSO4 on ABD and shoot survival was assessed to improve the process. Finally, six treatments were evaluated to optimize ABD and shoot leaf formation. Seed germination of 91.6 % was achieved in MS at 28 °C when the seed coat was removed. ABD was obtained in 45 % and 40 % with 0.4 mg L-1 KIN and 0.6 mg L-1 2-ip, respectively, with the least CAL. The modification in 453 mg L-1 CaCl2 then allowed 76 % ABD and 82 % explant survival. ABD response was optimized to 95 % and 2.45 leaves with MS medium + CaCl2 modification + 10 % coconut water + 0.4 mg L-1 KIN. The same results were obtained by replacing the latter with 0.6 mg L-1 2-ip. Rooting was achieved in MS without PGR, and acclimatization was successful. The results indicate that plant production via germination and vegetative propagation is effective for commercial purposes.

Palavras-chave : Axillary buds; Calcium; Kinetin; Micropropagation; 2-ip.

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