Abstract

GUTIERREZ, María Isabel; MIRANDA, Diego  and  CARDENAS-HERNANDEZ, Julián Fernando. Effect of pre-germination treatments on the germination of seeds of purple passion fruit (Passiflora edulis Sims.), sweet granadilla (Passiflora ligularis Juss.) and cholupa (Passiflora maliformis L.). rev.colomb.cienc.hortic. [online]. 2011, vol.5, n.2, pp.209-219. ISSN 2011-2173.

The aim of this research was to determine the effect of chemical and mechanical scarification on germination of purple passionfruit, sweet granadilla and cholupa seeds under laboratory conditions (alternating temperature 30/20°C [12/12 hours], relative humidity of 60% and in the dark for 30 days). The seeds of the three species seeds were subjected to three types of mechanical scarification (removal the basal point, removal the apical point and seed coat puncture), six treatments of chemical scarification (immersion in H₂SO₄ at 49% and 98%, for 1, 3 or 5 minutes) and compared to the control. Purple passionfruit seeds subjected to removal of the basal point and puncture achieved significant increases on germination (94% and 91% respectively) compared to other treatments and species. Sweet granadilla seeds also increased their germination after the removal of the basal point and seed coat puncture (52% and 30% respectively). No treatment favored the germination of cholupa seeds compared to the control.

Keywords : mechanical scarification; chemical scarification; alternating temperature; dark.

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